|
Journal of Applied Electrochemistry
Journal Prestige (SJR): 0.646  Citation Impact (citeScore): 2 Number of Followers: 12  Hybrid journal (It can contain Open Access articles)ISSN (Print) 1572-8838 - ISSN (Online) 0021-891X Published by Springer-Verlag  [2468 journals]
|
- Correction: Recent progress in the fabrication of nanostructured
zinc-based ternary metal oxides for high-performance lithium-ion batteries
-
Free pre-print version: Loading...
PubDate: 2023-06-01
-
- Correction: A comparison study of the electrochemical polishing of laser
powder bed fusion HR-2 stainless steel and AlSi10Mg-
Free pre-print version: Loading...
PubDate: 2023-06-01
-
- Optimization of electroosmotic flow to enhance the removal of contaminants
from low‑permeable soils-
Free pre-print version: Loading...
Abstract: Electrokinetic is an effective method for the extraction of contaminants from low-permeable soils. This work examines the influence of Ca+2 ions on the electroosmotic flow and the effect of electric potential, current, and pH variations on the removal of Pb2+, Na+, and Clˉ ions from artificially contaminated soil during vertical electrokinetic experiments. The DC electric field of 1 Vcm−1 was applied across the soil specimen via steel mesh electrodes for 24, 48, and 72 h of the experiment. In this work, the vertical electrokinetic cell was used to avoid the deposition of Na+ and Pb +2 ions near the soil surface after the treatment. making it even less permeable. The results show that the formation of acidic and alkaline environments in soil specimens affects the transport of ionic species by reducing the effect of electromigration and electroosmotic water flow. The enhancement of electroosmosis using Ca+2 ions as an electrolyte increased the extraction efficiency of Pb2+ (i.e., 41%) and Na+ (i.e., 82%) ions instead of the Clˉ (i.e., 69%) ions due to the high electroosmotic flow (i.e., 81 mL) from anode to the cathode. For relatively low electroosmotic flow (i.e., 19 mL), the extraction efficiency of Clˉ ions (i.e., 76%) was higher than that of Pb2+ (i.e., 27%) and Na+ (i.e., 44%) ions. The results demonstrated that the extraction efficiency of ions and energy consumption increased with treatment time and were higher during the first 24 h of the experiments. Graphical
PubDate: 2023-06-01
-
- Enhanced electrochemical performances of three-dimensional cubic ordered
mesoporous carbon by boron-doping for supercapacitor applications-
Free pre-print version: Loading...
Abstract: The boron-doped three-dimensional (3D) cubic ordered mesoporous carbon (B-OMC) is prepared by the decomposition of acetylene and triisopropyl borate on Fe-KIT-6 at 700 °C via in house developed simple bubbler-assisted chemical vapour deposition setup. The small-angle XRD and HRTEM analysis confirmed that the resultant material possesses a 3D cubic structure with an Ia3d space group and highly ordered mesopores that are arranged in regular intervals, respectively. The N2 adsorption/desorption isotherm revealed a surface area of about 301.07 m2/g and average pore size of around 4.57 nm. X-ray photoelectron spectroscopy (XPS) confirms that the boron atoms on the carbon nanostructure can be doped successfully. The electrochemical performance of the B-OMC shows a high specific capacitance of 329 F/g at a scan rate of 1 mV/s and 297 F/g at a current density of 0.2 A/g, excellent cycling stability of 97%, and low resistance in 6 M KOH. The fabricated symmetric supercapacitor device (B-OMC//B-OMC) with 1 M Na2SO4 reveals a relatively high energy density (10.27 Wh/kg) and power density (300.59 W/kg). Furthermore, the symmetric supercapacitor exhibited good cyclic stability with specific capacitance retention of 88.4% after 10,000 consecutive cycles, even with a high potential window of 2.0 V. Graphic
PubDate: 2023-06-01
-
- Efficient photoanode characteristics of cadmium sulfide films
multi-deposited through a chemical bath deposition process-
Free pre-print version: Loading...
Abstract: Photoelectrochemical and photocatalytic reactions are extensively investigated in terms of artificial photosynthesis as well as environmental purification, where the application of a photoelectrode (or a photocatalyst) responding to visible light for a targeted reaction is desired towards the massive decomposition to products. Cadmium sulfide (CdS) has attracted attention as one of the promising candidates, owing to its narrow band gap and large absorption coefficient. In the present work, CdS photoelectrode was prepared for the first time by chemical bath deposition process, especially with multiple deposition steps. When it was utilized as the photoanode in the presence of S2−, the steady-state photocurrents of the multi-deposited CdS were much higher than that of the single-deposited one. The above improvement was attributable to an increase in surface area originating in the formation of porous structure. In addition, the multi-deposited CdS got thicker on the vertical direction to electrode substrate, causing the redshift of its absorption edge, and thus enhancing the photoanodic output. This work provides a novel and effective approach for fabricating CdS photoelectrode. Graphical abstract
PubDate: 2023-06-01
-
- Electrochemical generation of hydrogen peroxide during cathodic
polarization of metallic orthopedic biomaterials-
Free pre-print version: Loading...
Abstract: Cathodic electrical stimulation has previously been studied for both the augmentation of bone healing as well as the treatment of implant associated infections. One of the proposed mechanisms of both of these effects is the electrochemical generation of hydrogen peroxide during the oxygen reduction reaction. Titanium and 316L stainless steel are commonly used as implants and surgical hardware in orthopedic applications. The oxygen reduction reaction has been shown to be complex on passivated metal electrodes such as these. Therefore, the exact potential ranges of H2O2 generation on these materials in physiologically relevant media are not fully characterized. This study employed Rotating Ring-Disk Electrode techniques as well as Scanning Electrochemical Microscopy methods to characterize the electrochemical generation of H2O2 on titanium and 316L stainless steel. Graphical abstract
PubDate: 2023-06-01
-
- Degradation of 1,4-dioxane from water and plating industry wastewater
using electrochemical batch and plug flow reactors-
Free pre-print version: Loading...
Abstract: The occurrence of 1,4-dioxane in the water has received significant attention due to its possible adverse effects to the environment and human health. The conventional techniques used for wastewater treatment are insufficient for the complete removal of 1,4-dioxane. Therefore, there is a need to develop technologies that can provide higher and faster 1,4-dioxane degradation capabilities. In this study, Electrochemical oxidation of 1,4-dioxane in laboratory water and electroplating industry wastewater was carried out in batch and plug flow reactor (PFR) configurations. Different process parameters were investigated and process optimization was performed. For the batch reactor, complete degradation of 1,4-dioxane from laboratory water was observed in 40 min with a pseudo-first order rate constant of 0.1076 min−1. For the simulated plating industry wastewater, 85.4% 1,4-dioxane was removed, while TOC and COD removals were 51% and 79%, respectively. For the PFR, 91% 1,4-dioxane degradation were observed for simulated wastewater, while COD removal was 99%. Since the electrochemical PFR showed the best performance, plating industry wastewater was treated via PFR under optimized conditions where 83% 1,4-dioxane degradation was achieved. Metal removals from the wastewater were also ranged between 88 and 99% via PFR. The electrical energy per order (EE/O) value of electrochemical treatment of 1,4-dioxane via electrochemical PFR was 6.62 kWh/m3 during the treatment of plating wastewater. 1,4-dioxane-2-one and 1,4-dioxane-2-ol were identified for the first time during electrochemical treatment of plating wastewater. Graphical abstract
PubDate: 2023-06-01
-
- A comparison study of the electrochemical polishing of laser powder bed
fusion HR-2 stainless steel and AlSi10Mg-
Free pre-print version: Loading...
Abstract: Electrochemical polishing (ECP) is effective for improving the surface quality of additively manufactured (AM) parts. However, ECP effects of AM parts manufactured from varied materials show significant differences owing to the complexity of phase composition, chemical composition, and specific surface defects. Accordingly, this paper compares the electrochemical polishing (ECP) results and mechanisms of the laser powder bed fusion (LPBF) additive manufacturing (AM) of HR-2 stainless steel (single-phase) and AlSi10Mg (multi-phase). Both kinds of LPBF parts show a significantly smoother surface after the ECP process. Following ECP, the Sa of HR-2 was reduced from 11.50 μm to 1.73 μm, while the Sa of AlSi10Mg was reduced from 14.91 μm to 4.70 μm. Notably, compared with LPBF HR-2, LPBF AlSi10Mg forms a solid viscous layer due to the buildup of polishing products after ECP, thus inhibiting the diffusion and reaction of the ions during the polishing process, resulting in a decrease in the polishing effect. Therefore, an in situ mechanical brushing (ECMP) targeting the product layer is conducted along with the ECP, and the surface roughness of the LPBF AlSi10Mg is further reduced to 2.19 μm. Due to the properties of the viscous layer, such an ECMP method is only suitable for the AlSi10Mg but not the HR-2 to further reduce the surface roughness as the ECMP LPBF HR-2 surface quality deteriorated from 1.73 to 2.51 μm. Graphical
PubDate: 2023-06-01
-
- Application of the Box–Behnken design in the response surface
methodology for the precipitation of Ni/Ni oxalate composite anodes-
Free pre-print version: Loading...
Abstract: In this work, first, using the Box–Behnken method, the temperature, oxalic acid/nickel mole ratio, and stirring duration are optimized to maximize the precipitation efficiency of nickel oxalate. Then, ANOVA is used to study the statistically significant parameters and their interactions. At 42.5 °C, with a 1.25 oxalic acid/nickel mole ratio and a 135 min stirring duration, 99.94% precipitation efficiency is achieved. A good agreement (R2 = 0.9535) between the predicted and experimental values is reported. Then, this obtained nickel oxalate hydrate is heat-treated at 290 °C for 3 h in a vacuum and turned into a composite made of anhydride oxalate and metallic nickel. The possible use of this composite as an anode material is first investigated: it delivers a capacity of 552.24 mAh g−1 after 100 cycles under a load of 100 mA g−1. Cyclic voltammetry is utilized to probe its lithiation mechanism. The structural and morphological properties of the composite are cited as a reason for its good cycling performance. Graphical abstract
PubDate: 2023-06-01
-
- Evaluation of microbial corrosion in biofuel storage tanks using
split-chamber zero resistance ammetry-
Free pre-print version: Loading...
Abstract: Split-chamber zero resistance ammetry (SC-ZRA) was used to study microbiologically influenced corrosion by aerobic chemoorganotrophic microeukaryotes isolated from biodiesel storage tanks. The magnitude and direction of electric current were measured between two shorted carbon steel electrodes, which were deployed in separate chambers connected by a salt bridge (via a SC-ZRA assembly). This approach permitted rapid screening for the corrosive activity of these previously understudied microeukaryotes. During this study, two previously understudied microeukaryotes (Byssochlamys sp. SW2 and Yarrowia lipolytica) showed increased biomass, an increase in electrochemical signal (current), and a corresponding increase in corrosion rate (weight loss). However, other previously understudied microeukaryote (Wickerhammomyces sp. SE3) showed an increase in biomass without an increase in electrochemical signal and minimal corrosion rate, indicating that the SC-ZRA technique can screen for the corrosive activity of a microorganism, regardless of overall microbial activity. This technique could be used to quickly assess the corrosive potential for a range of previously understudied microorganisms. Graphical
PubDate: 2023-06-01
-
- Reaction pathway of nitrate and ammonia formation in the plasma
electrolysis process with nitrogen and oxygen gas injection-
Free pre-print version: Loading...
Abstract: The plasma electrolysis method using N2 and O2 injection is an effective and environmentally friendly solution for nitrogen fixation into nitrate and ammonia. The reaction pathway, the effect of the N2 and O2 gas injection composition are important parameters in understanding the mechanism and effectiveness of these processes. This study aims to determine the formation pathway of nitrate and ammonia by observing the formation and role of reactive species as well as intermediate compounds. Two reaction pathways of NOx and ammonia formation have been observed. The NOx compound formed in the solution was oxidized by ∙OH to NO2, followed by the production of a stable nitrate compound. The ammonium produced from the ammonia pathway was generated from nitrogen reacting with ∙H from H2O. The amount of NH3 formed was lesser compared to the NOx compounds in the liquid and gas phases. This indicates that the NOx pathway is more dominant than that of ammonia. The gas injection test with a ratio of N2/O2 = 79/21 was the most effective for nitrate formation compared to another ratio. The results of the emission intensity measurement test show that the reactive species ∙N, ∙N2*, ∙N2+, ∙OH, and ∙O have a significant role in the nitrate formation through the NOx pathway, while the reactive species ∙N and ∙H lead to the formation of NH3. The highest nitrate product was obtained at a ratio of N2/O2: 79/21 by 1889 mg L−1, while the highest ammonia product reached 31.5 mg L−1 at 100% N2 injection. Graphic
PubDate: 2023-06-01
-
- Developing a photo-electric-field wireless electrochemical system for
highly efficient removal of diazinon as an organic model pollutant as a
next-generation electrochemical advanced oxidation process-
Free pre-print version: Loading...
Abstract: In order to treat wastewater effectively, this research suggests a general, next-generation electrochemical advanced oxidation process strategy based on electric-field-driven technology. In a single cell, wireless electrochemistry based on heterogeneous photo-electro Fenton-like (HPEFL) and photo-electro-catalytic (PEC) processes was integrated. The organic framework was composed of (MIL-53(Fe)) and graphitic carbon nitride (g-C3N4) as the cathode, and the anode was composed of N-TiO2/graphite. Using wireless electric fields and light, the HPEFL/PEC process should synergize simultaneously to destroy organophosphorus pesticides effectively. A single-factor experiment was conducted to optimize the contaminants encountered during the wireless process and reaction conditions. Under optimal circumstances (E: 2.1 ± 0.1 V, pH: 3.2), as demonstrated in this system, total organic carbon (TOC) removal efficiency was 93.0 ± 3.5% and chemical oxygen demand (COD) 97.0 ± 2.5% within 35 min, which is highly competitive when compared to previous advanced oxidation process works (typically less than 90% total organic carbon (TOC%) removal), contaminants encountered during the wireless HPEFL/PEC process. Also, the comparison mechanism of removal in two systems: the wireless electrode system and the two-electrode system (cathode and anode electrodes) were also examined by measuring the generation amount of hydrogen peroxide and hydroxide radicals. The residues and intermediates of diazinon as an organic pollutant removal were identified using gas chromatography-mass spectrometry (GC–MS) and ion chromatography. The results showed that all diazinon was eliminated after 17 min by the wireless HPEFL/PEC process. The current work demonstrates the exceptional capabilities of wireless electrochemistry for water and wastewater treatment. Graphical abstract
PubDate: 2023-06-01
-
- “Synergetic electrochemical performance of Nix–Mnx sulfide-based
binary electrode material for supercapattery devices”-
Free pre-print version: Loading...
Abstract: Mixed transition metallic sulfides have attracted researchers’ attention due to their unique electronic and electrochemical properties for energy storage devices. Herein, we have investigated nickel manganese sulfides (Nix–Mnx–S) based binary anode material for supercapattery devices. The hydrothermal method was used to synthesize the Nix–Mnx–S-based nanomaterials with different Ni to Mn ratios. Scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray (EDX), and Brunauer-Emmett-Teller spectroscopy (BETS) is used to examine surface characteristics, crystallinity, elemental analysis, and homogeneity. The electrochemical measurement of the Nix–Mnx–S-based electrode material is first explored in three electrodes assembly while maintaining a 1 M KOH electrolyte environment. Among all the electrodes, Ni0.50Mn0.50 S demonstrated exceptional performance with a specific capacity of 713 C/g or 1188 F/g at the current density of 1.0 A/g. Lastly, the Ni0.50Mn0.50 S based nanomaterials are used as working electrode and activated carbon (AC) as reference electrode for the two electrodes assembly test (Ni0.50 Mn0.50 S//AC). Which showing a high energy density of 35.24 (Wh/Kg), power density of 3200 (W/Kg), extraordinary specific capacity 158.6 C/g with coulomb efficiency 91.6% and capacity retention 70% after 11,000 galvanostatic charging/discharging (GCD) cycles. Our findings provide a platform to improve the performance of asymmetric energy storage devices. Graphical abstract
PubDate: 2023-06-01
-
- Recent progress in the fabrication of nanostructured zinc-based ternary
metal oxides for high-performance lithium-ion batteries-
Free pre-print version: Loading...
Abstract: Great efforts have been made to develop the fabrication of zinc-based ternary metal oxides used in lithium-ion batteries due to their excellent properties of good electrochemical activities, stable chemical structures, and high specific capacities in recent decades. Here, we reviewed the synthetic methods of zinc-based ternary metal oxides and their application in high-performance lithium-ion batteries, including effects of synthesis factors on morphologies and electrochemical properties of the materials. Meanwhile, various electrochemical and physical characterization techniques were used to characterize the Li-storage electrochemical processes of electrodes. Metal ion exchange methods, as popular and convenient synthesis ways, were used to synthesize zinc-based ternary metal oxides based on readily synthesized metal compounds as templates and metal ion sources by liquid phase cation exchange in the last decade. We key described the alcohol solvothermal zinc ion exchange reaction process and discussed effects of Zn/Ti mole ratios on structures and Li-storage electrochemical performance of the materials. Accordingly, we also predicted on the future development prospects of zinc-based ternary metal oxides. Graphical abstract
PubDate: 2023-06-01
-
- Characterization and electrooxidation activity of ternary metal catalysts
containing Au, Ga, and Ir for enhanced direct borohydride fuel cells-
Free pre-print version: Loading...
Abstract: Carbon nanotube (CNT)-supported catalysts were synthesized by the sodium borohydride (NaBH4) reduction method and characterized by X-ray diffraction, transmission electron microscopy, inductively coupled plasma-mass spectrometry, and X-ray photoelectron spectroscopy analyses. The catalytic activities of the catalysts were examined by cyclic voltammetry, chronoamperometry, electrochemical impedance spectroscopy, and linear sweep voltammetry electrochemical analyses for direct borohydride fuel cells (DBFCs) in NaBH4 solution. The characterization analyses revealed the structure, particle size, and metal ratios of CNT-supported metals. The NaBH4 electrooxidation results indicate that the 3% AuGaIr/CNT catalyst had a specific activity of 5.65 (1529.98 mA mg−1 Au) mA cm−2 and higher catalytic activity than the other catalysts. Furthermore, the electrochemical surface area (ECSA) values were obtained by calculating the reduction peak of the metal oxide in the NaOH solution by CV analysis. The ECSA value (128.57 m2 g−1) of 3% AuGaIr/CNT catalyst was much higher than the other catalysts. The 3% AuGaIr/CNT catalyst had faster electron transfer rate with low (961.8 Ω) charge transfer resistance (Rct) and also high stability compared to the other catalysts. The study presents an up-and-coming new type of anode catalyst for DBFC applications. Graphic
PubDate: 2023-06-01
-
- Electrochemical sensor based on a ZnO-doped graphitized carbon for the
electrocatalytic detection of the antibiotic hydroxychloroquine.
Application: tap water and human urine-
Free pre-print version: Loading...
Abstract: In December 2019, the world experienced a new coronavirus, SARS-CoV-2, causing coronavirus disease 2019 originating from Wuhan.The virus has crossed national borders and now affects more than 200 countries and territories. Hydroxychloroquine has been considered as a drug capable of treating COVID-19. The objective of this work is to establish a simple platform for electrocatalytic detection of hydroxychloroquine in human urine samples and pharmaceutical samples (tablets) using a ZnO@CPE sensor constructed by simple and inexpensive hydrothermal methods using a square wave voltammetry method. The best results are obtained in a PBS electrolyte with irreversible behavior of the hydroxychloroquine complement and controlled by diffusion coupled with absorption phenomena. The ZnO@CPE shifts the oxidation potential of hydroxychloroquine with the formation of a single very intense peak at the position of Epa = 0.5 V/(vs Ag/AgCl) with a shift is ΔEp = 0.1 V(vs Ag/AgCl) compared to the unmodified electrode. The obtained ZnO@CPE hybrid nanocomposite was characterized by different techniques and showed excellent electrocatalytic activity and higher active surface area compared to the bare carbon paste electrode. Under the optimized experimental conditions, the ZnO@CPE sensor showed good analytical performance for the determination of trace amounts of hydroxychloroquine, a wide linearity range from 10–3 M to 0.8 × 10–6 M with a very low detection limit in the range of 1.33 × 10–7 M, satisfactory selectivity, acceptable repeatability and reproducibility. The calculated recovery and coefficient of variation for the two samples analyzed are very satisfactory, ranging from 97.6 to 102% and 1.2 to 2.3% respectively. The proposed applied method and the fabricated sensor offer the possibility to analyze traces of hydroxychloroquine in real human urine and water samples. Graphical abstract Strategy for the electro-oxidation reaction of hydroxychloroquine on the electro-catalytic surface of the ZnO@Carbon graphite electrode and real-time detection of hydroxychloroquine.
PubDate: 2023-06-01
-
- Enhanced photoelectronic performance of MoS2 nanosheets decorated TiO2
nanotube arrays via simultaneously promoting light absorption and charge
separation-
Free pre-print version: Loading...
Abstract: Both light absorption and charge separation are highly important to the photoelectronic performance of semiconductor-based electrodes. Herein, we describe the fabrication of TiO2 nanotube arrays (NTAs) decorated with dual-functional molybdenum disulfide (MoS2) nanosheets using a facile hydrothermal method. The obtained MoS2/TiO2 heterojunction shows a high photocurrent density of 0.76 mA cm−2 at 1.23 VRHE (V vs. the reversible hydrogen electrode), which is over five times higher than that of pristine TiO2 NTAs. The enhanced photoelectronic performance is mainly attributed to the synergistic effect between the extended light absorption and improved charge separation after the introduction of MoS2 nanosheet. This simple yet general strategy provides a unique platform to improve the catalytic activity of photoelectrode materials with a narrow band-gap. Graphical abstract Both light absorption and charge separation are simultaneously enhanced via the fabrication of MoS2 nanosheets covered the top of TiO2 nanotube arrays (NTAs) to form MoS2/TiO2 heterojunction. This simple yet general strategy provides a unique platform to improve the catalytic activity of photoelectrode materials with a narrow band-gap.
PubDate: 2023-06-01
-
- Glycerol determination by chronoamperometry using Ni(OH)2/RGO on carbon
paste electrode-
Free pre-print version: Loading...
Abstract: Glycerol is a by-product obtained in the transesterification reaction together with biodiesel, a necessary renewable fuel. The presence of glycerol in fuel can bring up environmental harm and engine damage, making fuel quality control important. In this context, composite electrodes (CE) were developed with low-cost materials like syringes, copper wire, graphite, and paraffin. The surface of composite electrodes was modified with reduced graphene oxide (RGO) and hydroxide nickel (Ni(OH)2). SEM, EDX, Raman, and FT-IR ATR characterized the developed material. The electrooxidation of glycerol in an alkaline medium containing 0.10 M of NaOH was investigated by CV. In the presence of glycerol, the modified electrode increased the anodic and cathodic peak current with an anodic peak potential shift to 0.54 V. The electrodes were employed in a study of the determination of glycerol in real biodiesel samples by a chronoamperometric technique. The modified electrode showed a sensitivity of 1.63 × 103 µA mM and a LOD for glycerol of 2.24 × 10–5 M (R = 0.996). The mean response time of the modified electrodes to glycerol was 1.85 s. These electrodes show good reproducibility and competitive detection limit compared to the literature. The proposed method presented satisfactory results, with 94.98 and 100.39% sample recoveries. Graphical abstract
PubDate: 2023-05-27
-
- Design of an elevated pressure electrochemical flow cell for CO2 reduction
-
Free pre-print version: Loading...
Abstract: The electrochemical CO2 reduction reaction (CO2RR) has been proposed as a sustainable way of closing the carbon cycle while synthesizing useful commodity chemicals. One of the possible routes to scale up the process is the elevated pressure CO2RR, as this increases the concentration of the poorly soluble CO2 in aqueous systems. Yet, there are not many studies that focus on this route owing to the inherent challenges with high pressure systems. In this study, a novel high pressure flow cell setup has been designed and validated. The modular design uses a clamp system, which facilitates simple stacking of multiple cell parts while being capable of handling pressures up to 50 bar. The effects of CO2 pressure on the reaction were investigated on a gold (Au) foil cathode in a 0.1 M KHCO3 electrolyte. We successfully measured gaseous products produced during high pressure operation using an inline gas chromatograph. We find that the selectivity toward CO2 reduction products is enhanced while that of H2 evolution is suppressed as the pressure is increased from 2 to 30 bar. The reported setup provides a robust means to conduct high pressure electrolysis experiments in an easy and safe manner, making this technology more accessible to the electrochemical CO2RR community. Graphical abstract
PubDate: 2023-05-27
-
- Fast and facile electrosynthesis Ni-PtBTC MOF-derived nanocomposite as
highly efficient electrocatalysis for HER-
Free pre-print version: Loading...
Abstract: The use of renewable energy, especially water resources, through hydrogen evolution reduction (HER) is an important topic in research. In this survey, carbon cloth electrode (CCE) was applied as the working electrode, and NiBTC, Ni, Ni-Pt, and Ni-PtBTC were in situ electrosynthesized on the surface CCE as modifiers electrodes. After microstructural characterization of each modified electrode by field emission scanning electron microscopy (FE-SEM), their elemental analysis was accomplished by energy-dispersive X-ray analysis. The electrocatalytic performance of each presented modified CCEs toward HER was compared by linear scanning voltammetry and Tofel plot slope. Among these modified carbon cloth electrodes, Ni-PtBTC-modified CCE was shown the highest electroactive properties with an onset potential of 170 mV and Tafel slope of 40 mV dec−1. The results showed a minimum charge transfer resistance (Rct) of 112.3 Ω cm2 for Ni-PtBTC-modified CCE, and this modified electrode showed good stability under HER conditions despite low amount of platinum. Graphical abstract
PubDate: 2023-05-25
-
