Electrochemistry Communications最新文献_第10页

Comparative studies of recent advances in quantum dots nanocomposites for supercapacitor electrodes 超级电容器电极用量子点纳米复合材料的比较研究

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2025-01-20 DOI: 10.1016/j.elecom.2025.107874

Ghobad Behzadi Pour , Leila Fekri Aval

{"title":"Comparative studies of recent advances in quantum dots nanocomposites for supercapacitor electrodes","authors":"Ghobad Behzadi Pour , Leila Fekri Aval","doi":"10.1016/j.elecom.2025.107874","DOIUrl":"10.1016/j.elecom.2025.107874","url":null,"abstract":"<div><div>Novel material innovation is a driving force for advancing high-performance electrochemical energy storage technologies. Quantum dots (QDs), over the last decade, have exhibited immense potential in applications related to bioimaging, optoelectronics, catalysis, and energy storage, together with a remarkable rise in greener synthesis methods. Carbon nanomaterials, particularly carbon quantum dots (CQDs) and graphene quantum dots (GQDs), have garnered significant interest due to their exceptional characteristics, including high electrical conductivity, thermal stability, mechanical robustness, chemical durability, photoluminescence, affordability, and ease of surface modification. CQDs show promise for supercapacitors due to their unique properties but face challenges like limited surface area. Improving CQD synthesis and purification is crucial for enhancing supercapacitor performance. GQDs are praised for their conductive networks and surface properties, but more research is needed on industrial-scale synthesis. This review reported the recent advances in the electrochemical characteristics and synthesis of various QDs in supercapacitor electrodes.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"172 ","pages":"Article 107874"},"PeriodicalIF":4.7,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143102660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Electro-isolation of galvanic current 电流的电隔离

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2025-01-01 DOI: 10.1016/j.elecom.2024.107850

Guang-Ling Song , Xinran Yao

引用次数: 0

Electrochemical modification and analytical exploration of resazurin as a redox-active probe for electrochemical biosensors reazurin作为电化学生物传感器氧化还原活性探针的电化学修饰及分析探索

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2025-01-01 DOI: 10.1016/j.elecom.2024.107848

Balamurugan Thangavel , Won Han , Joong Ho Shin

{"title":"Electrochemical modification and analytical exploration of resazurin as a redox-active probe for electrochemical biosensors","authors":"Balamurugan Thangavel , Won Han , Joong Ho Shin","doi":"10.1016/j.elecom.2024.107848","DOIUrl":"10.1016/j.elecom.2024.107848","url":null,"abstract":"<div><div>An electrochemical potential-assisted functionalization strategy is used to immobilize resazurin (AZ) on multiwalled carbon nanotube surfaces in a physiological buffer leading to the formation of a resorufin/dihydro resorufin (RR/DRR) redox couple. The electrochemical characterizations that reveal the modified surface are surface-confined behavior with an electron transfer rate constant of 4.4 s<sup>−1</sup>. Thus modified RR/DRR redox couple was found to modulate the interfacial characteristics to the benefits of bio-electrocatalysis since the redox molecule has sensitivity to pH, negative redox potential, and selectivity to analytes. The hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) reduction and sensing performance of the AZ-modified electrode surface were evaluated. The experimental results revealed the direct detection of high concentrations of H<sub>2</sub>O<sub>2</sub> at the electrified interface before the oxygen reduction potential. Furthermore, the designed sensor exhibited high selectivity for H<sub>2</sub>O<sub>2</sub> even in the presence of interfering molecules in the solution. In addition, for the demonstration, the <em>glucose oxidase</em> enzymes were immobilized on carbon nanotubes modified with an RR/DRR redox couple, and the electron tunneling behavior was investigated. The developed sensor could be used for the reagent-less electrochemical biosensing of glucose up to 30 mM. Thus, the AZ-based redox electrode catalysts can be applied in diverse biosensor applications.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"170 ","pages":"Article 107848"},"PeriodicalIF":4.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Titanium deoxidation mechanism probed using an electron beam melting method 用电子束熔化法探讨了钛的脱氧机理

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2025-01-01 DOI: 10.1016/j.elecom.2024.107856

Hyun chul Kim , Namhun Kwon , Jae-Hong Shin , Dong hyun Kim , Soong Ju Oh , Kyoung-Tae Park

{"title":"Titanium deoxidation mechanism probed using an electron beam melting method","authors":"Hyun chul Kim , Namhun Kwon , Jae-Hong Shin , Dong hyun Kim , Soong Ju Oh , Kyoung-Tae Park","doi":"10.1016/j.elecom.2024.107856","DOIUrl":"10.1016/j.elecom.2024.107856","url":null,"abstract":"<div><div>In this study, we examine the volatilization of oxygen in titanium under electron beam melting (EBM) conditions, correlating the beam output with oxygen content changes. The potential for titanium deoxidation through the application of electron beams remains a subject of ongoing debate. To verify this experimentally, the effects of electron beam processing on the oxygen contents of different titanium raw materials are quantified by nitrogen/oxygen analysis. Moreover, the mechanism of oxygen diffusion in titanium, which is affected by the positively charged surface layer generated by the electron beam, is evaluated by determining the corresponding activation energy using density functional theory (DFT) calculations. An average reduction of oxygen concentration by 50 % was observed following EBM. Residual gas analysis confirmed the evolution of oxygen gas over a duration of 10 min. Thermodynamic calculations indicate that deoxidation is feasible at temperatures exceeding 4,000 K in a vacuum of approximately 5 <span><math><mrow><mo>×</mo></mrow></math></span> 10<sup>−7</sup> Torr, thereby substantiating the potential for deoxidation. Furthermore, DFT calculations demonstrated that the oxygen diffusion coefficient increases proportionally with an increase in positive surface charge, thereby facilitating the removal of oxygen in an electron beam environment.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"170 ","pages":"Article 107856"},"PeriodicalIF":4.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of precursors and pH factors for enhancing the performance of nickel-based catalysts for anion exchange membrane water electrolysis 提高阴离子交换膜电解镍基催化剂性能的前驱体和pH因子的设计

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2025-01-01 DOI: 10.1016/j.elecom.2024.107851

Eon-ju Park , Chiho Kim , Jooyoung Lee , Shin-Woo Myeong , Hoseok Lee , Sungjun Heo , Song Jin , Minjeong Park , Oi Lun Li , Sung Mook Choi

{"title":"Design of precursors and pH factors for enhancing the performance of nickel-based catalysts for anion exchange membrane water electrolysis","authors":"Eon-ju Park , Chiho Kim , Jooyoung Lee , Shin-Woo Myeong , Hoseok Lee , Sungjun Heo , Song Jin , Minjeong Park , Oi Lun Li , Sung Mook Choi","doi":"10.1016/j.elecom.2024.107851","DOIUrl":"10.1016/j.elecom.2024.107851","url":null,"abstract":"<div><div>In response to the escalating global energy crisis and climate change, green hydrogen is increasingly recognized as a clean energy solution. This study presents an innovative approach to enhance the performance of nickel-based catalysts for anion exchange membrane water electrolysis (AEMWE) through careful selection of precursor materials and pH optimization in the co-precipitation process. By optimizing precursor types and pH conditions during co-precipitation synthesis, we achieved high yields of Ni(OH)<sub>2</sub>, which were then thermally treated to form NiO. Notably, the nitrate-based NiO (N-NiO) exhibited superior catalytic activity and durability, attributed to its favorable microstructure and charge transfer capabilities. In addition, to verify universality of the N-NiO study and to assess the water electrolysis performance, we synthesized a binary compound, nickel–cobalt oxide (NCO), by incorporating Co, and evaluated its electrochemical performance in an AEMWE single-cell system. The nitrate-based NCO-based single-cell achieved a high current density of 1.38 A/cm<sup>2</sup> at 1.8 V<sub>cell</sub> in 1 M KOH at 50 °C, with a low degradation rate of 23 mV/kh at 1 A/cm<sup>2</sup> for 300 h. These findings provide valuable insights into the optimization of catalyst properties for hydrogen production and highlight significant commercial potential for hydrogen production and other electrochemical applications.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"170 ","pages":"Article 107851"},"PeriodicalIF":4.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic study on the anodic dissolution of 304 stainless steel with elastic stress in sodium chloride solution 304不锈钢弹性应力在氯化钠溶液中阳极溶解的动态研究

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2025-01-01 DOI: 10.1016/j.elecom.2024.107847

Jiayue Zhou, Guangming Ding, Qincheng Li, Pengyu Yang, Yongyan Zhu

引用次数: 0

Visualization of lithiated/delithiated particle distribution in Li4Ti5O12 electrode by ultralow-voltage scanning electron microscopy imaging 超低电压扫描电镜成像显示Li4Ti5O12电极中锂化/稀薄颗粒分布

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2025-01-01 DOI: 10.1016/j.elecom.2024.107849

Mitsunori Kitta

{"title":"Visualization of lithiated/delithiated particle distribution in Li4Ti5O12 electrode by ultralow-voltage scanning electron microscopy imaging","authors":"Mitsunori Kitta","doi":"10.1016/j.elecom.2024.107849","DOIUrl":"10.1016/j.elecom.2024.107849","url":null,"abstract":"<div><div>Characterization of the spatial distribution of lithiated/delithiated particles in Li-ion battery electrodes would facilitate an understanding of the reactions taking place. Here, ultralow-voltage (<1 kV) accelerated scanning electron microscopy (ULV-SEM) was used to visualize the distribution of lithiated/delithiated particles in the Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> electrode. A conductive additive-free electrode was prepared using commercially available Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> powder and partially lithiated using an electrochemical cell. The secondary electron (SE) image of the partially lithiated electrode acquired at an acceleration volage of 500 V shows a clear distribution of the lithiated/delithiated secondary particles. The contrast of the high-angle backscattered electron (HA-BSE) image of the corresponding voltage is different from that of the SE mode, providing heterogeneous physical information on the secondary particles in the electrode, such as inhomogeneous surface electronic conductive pathway of each particle. With its facile and high-throughput screening, ULV-SEM imaging is a promising method for characterizing LIB electrodes and clarifying the reactions occurring.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"170 ","pages":"Article 107849"},"PeriodicalIF":4.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In situ synthesis of Mo-doped carbon-coated NiCo2S4 nanosheet networks for supercapacitors 超级电容器用掺杂mo碳包覆NiCo2S4纳米片网络的原位合成

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2025-01-01 DOI: 10.1016/j.elecom.2024.107853

Kaiyu Wang , Fan Zhou , Jiangnan Chu , Wenchong Ouyang , Kun Wang , Zhengwei Wu

{"title":"In situ synthesis of Mo-doped carbon-coated NiCo2S4 nanosheet networks for supercapacitors","authors":"Kaiyu Wang , Fan Zhou , Jiangnan Chu , Wenchong Ouyang , Kun Wang , Zhengwei Wu","doi":"10.1016/j.elecom.2024.107853","DOIUrl":"10.1016/j.elecom.2024.107853","url":null,"abstract":"<div><div>Supercapacitors offer numerous advantages, including high power output, quick charging and discharging rates, and stable cycling performance. Nevertheless, their energy density and cycle life still fall short of current industry demands for energy storage. To address these challenges, this work fabricated nanostructured electrodes by synthesizing molybdenum-doped carbon-coated NiCo<sub>2</sub>S<sub>4</sub> (C@NiCo<sub>2</sub>S<sub>4</sub>-Mo), using NiCo<sub>2</sub>S<sub>4</sub> as the precursor. The doping of molybdenum, a transition metal with many oxidation states, significantly improved the electronic structure and stability of the electrode material. Additionally, incorporating a carbon-coated structure enhanced the material’s stability during cycling, extending its operational lifespan. The results demonstrated that C@NiCo<sub>2</sub>S<sub>4</sub>-Mo exhibited exceptional electrochemical properties, featuring a defined capacitance of 931.75 Farad/g under the current flux of 1 A/g. This high specific capacitance value, a vital factor regarding capacitor performance, directly influences the energy storage capacity of the device, indicating the high potential of the C@NiCo<sub>2</sub>S<sub>4</sub>-Mo material for supercapacitors. It was observed that the particular capacity retention was 76.6 % when the current density was increased by a factor of 10. The substance also showed favorable pseudocapacitive characteristics, retaining 87.7 % of its particular capacitance after prolonged cycling in cyclic voltammetry (CV) tests, highlighting its outstanding cyclic stability. Furthermore, supercapacitors constructed from C@NiCo<sub>2</sub>S<sub>4</sub>-Mo achieved an energy density of 14.5 Wh/kg at a power density of 700 kW/kg, making them promising candidates for energy storage applications.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"170 ","pages":"Article 107853"},"PeriodicalIF":4.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of anti-poisoning catalysts for hydrogen oxidation reaction in next-generation anion exchange membrane fuel cells 下一代阴离子交换膜燃料电池氢氧化反应抗中毒催化剂的设计

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2025-01-01 DOI: 10.1016/j.elecom.2024.107852

Jiho Min , Yunjin Kim , Seunghyun Lee , Keonwoo Ko , Sourabh S. Chougule , Abhishek A. Chavan , Khikmatulla Davletbaev , Beomjun Pak , Hyelim Park , Sung-Dae Yim , Namgee Jung

{"title":"Design of anti-poisoning catalysts for hydrogen oxidation reaction in next-generation anion exchange membrane fuel cells","authors":"Jiho Min , Yunjin Kim , Seunghyun Lee , Keonwoo Ko , Sourabh S. Chougule , Abhishek A. Chavan , Khikmatulla Davletbaev , Beomjun Pak , Hyelim Park , Sung-Dae Yim , Namgee Jung","doi":"10.1016/j.elecom.2024.107852","DOIUrl":"10.1016/j.elecom.2024.107852","url":null,"abstract":"<div><div>Extensive research has been conducted on hydrocarbon-based ionomers and membranes with high ionic conductivity and chemical stability for next-generation anion exchange membrane fuel cells (AEMFCs). However, it is well known that the benzene groups of hydrocarbon-based ionomers seriously poison the active sites of Pt catalysts, thereby reducing hydrogen oxidation reaction (HOR) activity and AEMFC performance. Over the past years, the development of benzene-tolerant catalysts has mainly focused on metal alloy nanoparticles such as PtRu, without pursuing the design of breakthrough catalyst structures that can more effectively reduce benzene poisoning. Here, we introduce an anti-poisoning catalyst structure promoted by the synergistic effect of carbon shell encapsulation and metal alloying. The porous carbon shell encapsulating the metal nanoparticles is expected to prevent direct adsorption of benzene groups, while the alloying of Pt and Ru can reduce the benzene adsorption energy itself. Comparative electrochemical analysis results confirm that the carbon shell-encapsulated metal alloy catalyst significantly alleviate benzene poisoning, exhibiting superior HOR activity than the conventional alloys in benzyltrimethylammonium hydroxide (BTMAOH) solution.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"170 ","pages":"Article 107852"},"PeriodicalIF":4.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrochemical detection of pesticides: A comprehensive review on voltammetric determination of malathion, 2,4-D, carbaryl, and glyphosate 农药的电化学检测：马拉硫磷、2,4-D、西维因和草甘膦的伏安法测定综述

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2024-11-17 DOI: 10.1016/j.elecom.2024.107839

Andualem Ejigu , Molla Tefera , Atnafu Guadie

引用次数: 0