International Journal of Electrochemical Science最新文献

{"title":"Designing novel 0D/1D/2D architectural CoOx/MWCNTs/rGO hierarchically porous nanocomposite for high-performance supercapacitors","authors":"Gaosheng Nie ,&nbsp;Xiongfei Sun ,&nbsp;Liyin Xu ,&nbsp;Ke Wu ,&nbsp;Zilong Wei ,&nbsp;Shuwu Liu","doi":"10.1016/j.ijoes.2025.100958","DOIUrl":"10.1016/j.ijoes.2025.100958","url":null,"abstract":"<div><div>MOF-derived cobalt oxides (CoO_x) have attracted extensive attentions due to their excellent theoretical specific capacitances, permanent porosity and controllable structures. However, the inherent poor conductivity of single-component cobalt oxide, and the structural collapse, pore loss and agglomeration during pyrolysis process are still the main factors to limit the performance of CoO_x. Structure design of 3D hierarchical porous heterostructure composites through 0D/1D/2D materials is an effective strategy for boosting the capacitive performance of CoO_x. Herein, the rationally designed 3D hierarchically porous CoO_x/MWCNTs/rGO ternary hybrid composite was constructed through high-temperature pyrolysis of a facile self-assembled 0D/1D/2D Co-MOF/MWCNTs/GO precursor. Indeed, The CoO_x/MWCNTs/rGO electrode exhibited an excellent specific capacitance of 520 F g⁻¹ at 0.5 A g⁻¹, outstanding rate capability of 80.77 % capacitance retention even at 20 A g⁻¹, and ideal durability with about 8.4 % capacitance decay after 10000 cycles. Moreover, the CoO_x/MWCNTs/rGO exhibited a maximum energy density of 14.6 Wh kg⁻¹ with a power density of 41.2 W kg⁻¹.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"20 4","pages":"Article 100958"},"PeriodicalIF":1.3,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation of p-phenylenediamine acetaldehyde-metal ion complexes and its electrochemical properties","authors":"Xin Wang,&nbsp;Zhiruo Bian,&nbsp;Da Wang,&nbsp;Cong Liu,&nbsp;Zhaoxu Yu,&nbsp;Qingning Li","doi":"10.1016/j.ijoes.2025.100955","DOIUrl":"10.1016/j.ijoes.2025.100955","url":null,"abstract":"<div><div>The development of electrochemical energy storage is of great significance to \"carbon peak\" and \"carbon neutrality\". As a key research direction of electrochemical energy storage, supercapacitors are widely used in transportation information, industrial manufacturing, intelligent equipment and other fields with high power density, long cycle life and good safety The objective of this paper is to prepare p-phenylenediamine acetaldehyde is also known as Schiff base B. From there, we introduced metal ionic complexes (M=Al^3 +, Co²⁺, Cu²⁺) to prepare p-phenylenediamine glycolaldehyde-metal ionic complexes (Schiff base B-M,M=Al³⁺, Co²⁺, Cu²⁺). The Schiff base B-M polymer exhibited a finer structure and a higher specific surface area when compared to Schiff base B-M. Additionally, the Schiff base B's spherical structure was destroyed, exposing more of the electrode material's active sites. This led to the formation of richer ion channels between the electrolyte ions in the electrolyte and the electrode material, ultimately improving the capacitive performance. Cyclic voltammetry (CV), constant current charge/discharge (GCD), and electrochemical impedance spectroscopy (EIS) were used to assess the electrochemical performance of Schiff base B-M. The findings demonstrated a significant increase in the specific capacitance of the Schiff base B-M electrode material when compared to the Schiff base B electrode material, suggesting that the doping of metal ions can raise the specific capacitance of poly-Schiff bases. The Schiff base B-Cu electrode material had the best multiplicative performance, with a specific capacitance of 52 F/g at 10 A/g and a multiplicative performance of 50.2 %, while the Schiff base B-Co had a specific capacitance of 38 F/g with a multiplicative performance of Schiff base B-Cu had a specific capacitance of 52 F/g at 10 A/g with a multiplicative performance of 50.2 %, while Schiff base B-Co had a multiplicative performance of 38 F/g with a multiplicative performance of 28.5 %, and Schiff base B-Al had a multiplicative performance of 28 F/g with a multiplicative performance of 23.3 % only. Because of this, Schiff base B-M would be a potential material for supercapacitors and provided an avenue for more study into different poly-Schiff alkali metal complexes as supercapacitor electrode materials.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"20 3","pages":"Article 100955"},"PeriodicalIF":1.3,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143098832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of coating layers on microstructure and electrochemical properties of Ti/RuO2-IrO2-TiO2 anode prepared by polymeric sol-gel method","authors":"Shuai Zhou ,&nbsp;Likun Xu ,&nbsp;Yonglei Xin ,&nbsp;Yonghong Lu ,&nbsp;Mingshuai Guo ,&nbsp;Penghe Liu ,&nbsp;Haibo Xu ,&nbsp;Tigang Duan","doi":"10.1016/j.ijoes.2025.100957","DOIUrl":"10.1016/j.ijoes.2025.100957","url":null,"abstract":"<div><div>The effect of coating layers on the microstructure and electrochemical properties of Ti/RuO₂-IrO₂-TiO₂ anode prepared by polymeric sol-gel method was systematically investigated using surface analysis techniques of SEM, EDS, XRD, and electrochemical methods of CV, EIS, potentiodynamic polarization, and accelerated life test. The results show that the area fraction of surface cracks and the coating porosity of the anode are enlarged with the increase of coating layers. The micro cracks on the above layer are affected by the surface morphology of the previous layer of the coating. As the number of coating layers is increased, the electrochemically active surface area and electrocatalytic activity of the anode are enhanced, and the accelerated lifetime of the anode is prolonged. The anode with 12 layers shows the highest utilization efficiency of the coating. The residual oxide coating after failure of the anode is increased with adding layers. The consumption rate of the coating is large for the anode with three or less layers, which is decreased obviously and then stabilized as the number of layers continues to increase.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"20 3","pages":"Article 100957"},"PeriodicalIF":1.3,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143098833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced control of magnetite nanoparticle electrosynthesis through cyclic voltammetry","authors":"Lucero I. Ledesma-Fosados ,&nbsp;Nohra V. Gallardo-Rivas ,&nbsp;Ulises Páramo-García ,&nbsp;Ricardo García-Alamilla ,&nbsp;José de J. Pérez-Bueno ,&nbsp;Ana M. Mendoza-Martínez","doi":"10.1016/j.ijoes.2025.100956","DOIUrl":"10.1016/j.ijoes.2025.100956","url":null,"abstract":"<div><div>In this work, we report the electrosynthesis of magnetite (Fe₃O₄) nanoparticles using cyclic voltammetry with a carbon steel sacrificial anode in NaCl solutions. The study explored scan rates between 1 and 20 mV/s in NaCl concentrations of 0.01 M and 0.1 M. Comprehensive characterization using Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD), and dynamic light scattering (DLS) revealed that the slower scan rates and higher electrolyte concentrations promoted the formation of well-crystallized magnetite. At higher scan rates and lower NaCl concentrations, intermediate iron oxide phases such as goethite (α-FeOOH) and lepidocrocite (γ-FeOOH) were observed. The smallest crystallite size (18 nm) was obtained at 1 mV/s in 0.1 M NaCl, confirming that lower scan rates favor smaller and more uniform nanoparticles. This work highlights the influence of scan rate and electrolyte concentration on nanoparticle size, phase purity, and morphology, offering insights into controlling these parameters for optimized synthesis. The findings have significant implications for environmental applications such as water remediation and energy storage technologies.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"20 4","pages":"Article 100956"},"PeriodicalIF":1.3,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"One-pot synthesis of Schiff base as an excellent corrosion inhibition for Inconel 800 alloy in sulfuric acid medium: Experimental, DFT calculation and spectroscopic inspections","authors":"Faten E. El-Morsy ,&nbsp;Nashwa Mohammed Alahmar ,&nbsp;Norah Salim Alhebshe ,&nbsp;Marwah M.M. Madkhali","doi":"10.1016/j.ijoes.2025.100944","DOIUrl":"10.1016/j.ijoes.2025.100944","url":null,"abstract":"<div><div>A new heterocyclic Schiff base was synthesized and characterized, namely: N¹,N³-Bis(1-(pyridin-2-yl)ethylidene)malonohydrazide (H₂L). The molecular chemical structure of H₂L was characterized using proton nuclear magnetic resonance (¹HNMR), Infrared spectroscopy (IR), and elemental analysis. The inhibition effect of compound H₂L against the corrosion of Inconel 800 in 1 M H₂SO₄ was studied by chemical (weight loss) and electrochemical techniques (Tafel polarization and electrochemical impedance spectroscopy, EIS). Electrochemical and gravimetric measurements showed that% IE increases with increasing concentration and exhibited a maximum efficiency of 91 % at 18 × 10⁻⁶ M by the WL method. Inhibition efficiency increases with higher concentration and decreases as the temperature increases. The polarization technique indicates that this compound behaves as a mixed-type inhibitor. The adsorption of this compound was found to obey the Langmuir adsorption isotherm. The surface examination of the Inconel 800 surface with H₂L was tested using scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy <em>(EDX)</em>, and atomic force microscope (AFM) to confirm that H₂L was adsorbed on Inconel 800 forming a film. The kinetic and thermodynamic parameters were calculated and discussed. The results of the theoretical study using DFT confirm the experimental results.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"20 3","pages":"Article 100944"},"PeriodicalIF":1.3,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143149378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation and characterization of metal oxide/carbon nanotube nanocomposites for photocatalytic and photo-electrocatalytic hydrogen production: A review","authors":"Dina Thole ,&nbsp;Sheriff A. Balogun ,&nbsp;Kwena D. Modibane ,&nbsp;Reineck Mhlaba ,&nbsp;Ebrahiem Botha ,&nbsp;Nicholas M. Musyoka","doi":"10.1016/j.ijoes.2025.100929","DOIUrl":"10.1016/j.ijoes.2025.100929","url":null,"abstract":"<div><div>The study of metal oxide and carbon nanomaterials for hydrogen evolution reaction (HER) catalysis stands out among the innovative solutions required by the rapid advancement of renewable energy. The potential of metal oxide catalysts to produce hydrogen is promising. In parallel, a lot of attention is being given to carbon nanotubes because of their numerous applications in environmental remediation and renewable energy. Despite an extensive amount of research on these materials, their composites, metal oxide-carbon nanotubes (MO-CNTs), remain relatively underexplored for their photocatalytic and photoelectrocatalytic (PEC) capabilities. This comprehensive study fills this knowledge gap by concentrating on the techniques used in producing and characterizing MO-CNTs composites. Aiming ways of developing methods to produce green hydrogen energy that is cost-effective. The most economical method of producing hydrogen remains to be photocatalysis. One of the important properties in photocatalysis is the band gap of the material. Many metal oxides are reported to have a high band gap; for example, recent reports indicate that TiO₂ has a band gap of 3.11 eV. Upon forming the composite with CNTs, the band gap was reduced to 3.09 eV. The reduction in the band gap is responsible for improved hydrogen production. To further understand the composites of MO-CNTs, characterization techniques, including scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), cyclic voltammetry (CV), and chronoamperometry (CA), were thoroughly discussed. These techniques assist in understanding and improving the MO-CNTs composites and the synergy between the MO and CNTs. The synergistic effects of the metal oxides and carbon nanotubes are responsible for the outstanding enhancement in hydrogen production under light irradiation, as revealed by photocatalytic tests.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"20 3","pages":"Article 100929"},"PeriodicalIF":1.3,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143098830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrochemical, surface, and theoretical studies on amine-based organic compounds as efficient corrosion inhibitors for mild steel in 1 M HCl","authors":"Mohamed Aoulad Belayachi ,&nbsp;Otmane Kharbouch ,&nbsp;Khadija Dahmani ,&nbsp;Anouar El Magri ,&nbsp;Nordine Er-rahmany ,&nbsp;Issam Saber ,&nbsp;Fatima El hajri ,&nbsp;Galai Mouhsine ,&nbsp;Shaim Abdelillah ,&nbsp;Zakaria Benzekri ,&nbsp;Said Boukhris ,&nbsp;Rafa Almeer ,&nbsp;Abdelkarim Chaouiki","doi":"10.1016/j.ijoes.2025.100951","DOIUrl":"10.1016/j.ijoes.2025.100951","url":null,"abstract":"<div><div>The present article examines the inhibitory efficiency of two synthesized amine-based organic molecules, namely 11-(2-chlorophenyl)-3,3-dimethyl-2,3,4,5,10,11-hexahydro-1H-dibenzo[be][1,4]diazepin-1-one (<strong>CDHD</strong>) and 3,3-dimethyl-11-phenyl-2,3,4,5,10,11-hexahydro-1H-dibenzo[be][1,4]diazepin-1-one (<strong>DPHD</strong>), in reducing the corrosion of mild steel in a 1 M hydrochloric acid solution. These inhibitors were synthesized and characterized by NMR spectroscopy, and their corrosion inhibition performance was evaluated using gravimetric and electrochemical techniques, including open circuit potential (OCP), Tafel polarization, and electrochemical impedance spectroscopy (EIS). Potentiodynamic polarization curves showed that the tested compounds act as mixed-type inhibitors. EIS analyses indicated that the charge transfer resistance increased from 22.7 Ω.cm² to 397.8 Ω.cm² and 606.2 Ω·cm² at a concentration of 10⁻³ M of <strong>CDHD</strong> and <strong>DPHD</strong>, respectively. Additionally, it was found that the adsorption of both compounds on the mild steel surface follows the Langmuir adsorption isotherm equation. These compounds also retained their inhibition efficiency at high temperatures. Surface morphology and elemental composition analyses of steel samples, performed using scanning electron microscopy (SEM) coupled with energy dispersive X-ray spectroscopy (EDS), confirmed the formation of a barrier layer covering the mild steel surface. Furthermore, quantum chemical calculations using density functional theory (DFT) provided insights into the reactivity and adsorption characteristics of the inhibitors, validated by molecular dynamic simulations. The study highlights the high efficiency of both inhibitors, with inhibition efficiencies reaching 95.9 % for DPHD at a concentration of 10⁻³ M, emphasizing their potential as environmentally friendly corrosion inhibitors for industrial applications.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"20 4","pages":"Article 100951"},"PeriodicalIF":1.3,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A semi-analytical solution of a nonlinear boundary value problem arises in porous catalysts","authors":"S. Krishnakumar ,&nbsp;P. Jeyabarathi ,&nbsp;M. Abukhaled ,&nbsp;L. Rajendran","doi":"10.1016/j.ijoes.2025.100953","DOIUrl":"10.1016/j.ijoes.2025.100953","url":null,"abstract":"<div><div>In the heterogeneous catalysis, the interaction of transport effects significantly influences reaction rates. Heterogeneous catalysis is essential in several industrial processes and has various practical applications, such as protecting the environment, power generation, synthesis of chemicals, and the manufacturing of biodiesel. This intricate interaction includes external mass transfer resistance and intra-particle diffusion within the porous catalysts, which are often different from conventional chemical kinetics. The heterogeneous catalysts employed in many chemical applications are either porous materials or are created as microscopic particles with a few nanometers diameter coated on a porous substrate like silica or alumina. Mathematical modeling of such phenomena involves nonlinear boundary value problems, with necessitating approximate solutions due to their complexity. This article introduces the efficient Akbari-Ganji method (AGM), which is a semi-analytical approach for solving the nonlinear equations without requiring problem transformation or distinct nonlinear term treatment. We utilize the AGM to derive reliable analytical solutions for a nonlinear reaction-diffusion equation, specifically encompassing the Langmuir-Hinshelwood-Hougen-Watson (LHHW) model. By comparing AGM results with numerical simulations implemented in the MATLAB, this study highlights the AGM's ability in addressing nonlinear boundary value problems. The AGM's significance resides in its potential to unravel complex catalyst-related challenges and engineering applications. This work underlines the power of analytical solutions, allowing explicit insights, broad generalizations, sensitivity analyses, and parametric studies, and hence enriching our understanding of transport phenomena in the heterogeneous catalysis.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"20 3","pages":"Article 100953"},"PeriodicalIF":1.3,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143149380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of heat treatment on corrosion resistance of NiTi shape memory alloys in NaCl solution","authors":"Li Xinmei ,&nbsp;Suo Shuai ,&nbsp;Xue Tianxiang ,&nbsp;Li Wen ,&nbsp;Bu Yanjiang ,&nbsp;Wu Dongting","doi":"10.1016/j.ijoes.2025.100949","DOIUrl":"10.1016/j.ijoes.2025.100949","url":null,"abstract":"<div><div>This study conducts quenching heat treatment on hot-rolled Nickel-Titanium (NiTi) shape memory alloys, and explores effects of quenching heat treatment on microstructure and corrosion resistance of NiTi shape memory alloys through microstructure, cyclic tensile mechanical properties, polarization curves, electrochemical impedance spectroscopy, and Mott-Schottky tests. It reveals that quenching heat treatment refines the alloy's grain structure, enhances the uniformity of the microstructure, facilitates the diffusion and dissolution of Ti-C carbides, and optimizes the distribution of the alloy's chemical composition. While heat treatment may result in a reduction of the material's super-elasticity, it significantly enhances its corrosion resistance. It reduces the self-corrosion current density and corrosion rate, increases the charge transfer resistance, decreases the carrier concentration, and strengthens the stability of the passivation film. Consequently, quenching heat treatment proves to be an effective method for optimizing the performance of NiTi shape memory alloys and enhancing their corrosion resistance.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"20 4","pages":"Article 100949"},"PeriodicalIF":1.3,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrodeposition and recovery of copper from simulated wastewater using alkali-modified amidoxime carbon felt coated with polyacrylonitrile","authors":"Dingqian Xue ,&nbsp;Chunjian Deng ,&nbsp;Jiayi Wu ,&nbsp;Hao Cheng ,&nbsp;Wei Hu ,&nbsp;Yongzhuang Zhang ,&nbsp;Zhongbing Wang ,&nbsp;Chunli Liu ,&nbsp;Guisheng Zeng","doi":"10.1016/j.ijoes.2025.100954","DOIUrl":"10.1016/j.ijoes.2025.100954","url":null,"abstract":"<div><div>The recovery of copper ions by electrodeposition is a common method for the treatment of copper-containing wastewater, but the effect of using ordinary carbon felt electrode electrodeposition is not ideal. In order to further improve the electrodeposition effect of carbon felt electrode on Cu²⁺, in this study，polyacrylonitrile was coated on the surface of the carbon felt, after which the sample was subjected to amidoxime and alkaline hydrolysis. The modified amidoxime carbon felt was prepared by loading amidoxime, amide and carboxyl groups at the same time. The experimental results showed that the modified amidoxime carbon felt had good selectivity for Cu²⁺ during adsorption. Under the same experimental conditions, the adsorption and electrodeposition of Cu²⁺ by the modified amidoxime carbon mat were greater than those by the amidoxime carbon mat. Using modified amidoxime carbon felt as the working electrode and bare carbon felt as the opposite electrode, an asymmetric AC voltage with a frequency of 400 Hz, + 5 V (20 %) and −10 V (80 %) was applied at 25 °C, the initial concentration of Cu²⁺ was 100 mg/L, and the initial pH was 3.5. The Cu²⁺ electrodeposition efficiency of the modified carbamic acid mat was the highest, and the recovery efficiency of Cu²⁺ reached 99.99 %. Since there are lone electron pairs on the amidoxime group, amide group and carboxyl group supported by the modified amidoxime carbon felt at the same time, the adsorption site of Cu²⁺ can be increased, so the recovery efficiency of Cu²⁺ can be greatly improved.The use of modified amidoxime carbon felt in this study provides a new way to recover copper from copper wastewater.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"20 4","pages":"Article 100954"},"PeriodicalIF":1.3,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143421087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}