Electrochemistry Communications最新文献_第4页

Effect of dopamine modification on the oxygen reduction reaction activity of Pt/C catalyst 多巴胺修饰对Pt/C催化剂氧还原反应活性的影响

IF 4.2 3区工程技术

Electrochemistry Communications Pub Date : 2026-01-01 Epub Date: 2025-12-04 DOI: 10.1016/j.elecom.2025.108093

Guoyu Shi , Donald A. Tryk , Akihiro Iiyama , Makoto Uchida , Hironori Osada , Katsuyoshi Kakinuma

{"title":"Effect of dopamine modification on the oxygen reduction reaction activity of Pt/C catalyst","authors":"Guoyu Shi , Donald A. Tryk , Akihiro Iiyama , Makoto Uchida , Hironori Osada , Katsuyoshi Kakinuma","doi":"10.1016/j.elecom.2025.108093","DOIUrl":"10.1016/j.elecom.2025.108093","url":null,"abstract":"<div><div>Modifying Pt-based catalysts with organic molecules offers a promising strategy to enhance oxygen reduction reaction (ORR) performance. In this study, dopamine (DA) was used to modify Pt/C, and its impact on electrochemical behavior and ORR activity was systematically investigated. Through DA modification, the ORR activity can be improved to 1.5 times that of pristine Pt/C. This enhancement is linked to DA's ability to maintain a more metallic Pt surface by preventing excessive oxidation. Density functional theory (DFT) calculations indicate that DA binds moderately strongly to the Pt surface, based on π-bonds between Pt and the aromatic carbons in a flat configuration that partially covers the surface while leaving active sites accessible. DA effectively inhibits the formation of surface-blocking OH<sub>top</sub>–OH<sub>bridge</sub> pairs on (111) terraces, thus preserving O<sub>2</sub> adsorption sites at (110) edges and unpaired OH<sub>top</sub> sites, which are necessary in the ORR. Thus, this work provides mechanistic insight into DA's function and suggests a practical route to improving fuel cell performance through organic–inorganic interface engineering.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"182 ","pages":"Article 108093"},"PeriodicalIF":4.2,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145732952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Exploring the sub-nanometre domain: Evaluating mass loading effects on platinum nanocluster catalysts fabricated via magnetron sputtering 探索亚纳米领域：评价磁控溅射制备的铂纳米团簇催化剂的质量负载效应

IF 4.2 3区工程技术

Electrochemistry Communications Pub Date : 2026-01-01 Epub Date: 2025-12-11 DOI: 10.1016/j.elecom.2025.108095

Richard O.D. Clark , Eman Alharbi , Gazi Aliev , Wolfgang Theis , Emerson C. Kohlrausch , Jesum Alves Fernandes , Neil V. Rees

{"title":"Exploring the sub-nanometre domain: Evaluating mass loading effects on platinum nanocluster catalysts fabricated via magnetron sputtering","authors":"Richard O.D. Clark , Eman Alharbi , Gazi Aliev , Wolfgang Theis , Emerson C. Kohlrausch , Jesum Alves Fernandes , Neil V. Rees","doi":"10.1016/j.elecom.2025.108095","DOIUrl":"10.1016/j.elecom.2025.108095","url":null,"abstract":"<div><div>Herein we demonstrate the use of magnetron-sputtered, low weight-loading platinum on carbon black catalysts as a pathway to reducing mass of platinum in electrolyser and fuel cell applications. In contrast to wet chemical methods, which often require multi-step syntheses involving toxic chemicals and washing post synthesis, magnetron sputtering can produce catalysts for use immediately after production. Scanning transmission electron microscope (STEM) analysis shows these bespoke catalysts possess a bimodal distribution of particle sizes, with nanoparticles approximately half the size of commercial equivalents (ca.1 vs > 2 nm) and a distinct distribution of single metal atoms, dimers and trimers. Measurement of the electrochemically active surface area (ECSA) revealed a higher surface area across all fabricated catalysts, ranging from 17 % to 51 % higher than commercial equivalents. This increased surface area provides a comparable hydrogen evolution reaction (HER) onset potential at a fraction of the platinum loading, indicating both that kinetics are not affected measurably by changes in platinum size and that the Pt particles are well dispersed across the support. In contrast, the oxygen reduction reaction (ORR) activity showed clear kinetic differences due to particle size with the onset potential varying by over 100 mV across the catalyst samples, reflecting the influence of stable platinum nanoclusters on catalytic activity. Rotating ring disc electrode (RRDE) voltammetry offered additional insight into the size and dispersion of the platinum nanoclusters across the samples, elucidating differences between them</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"182 ","pages":"Article 108095"},"PeriodicalIF":4.2,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145786470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Time-resolved X-ray computed tomography of wetting at the outer surface of the microporous layer in a polymer electrolyte fuel cell 聚合物电解质燃料电池微孔层外表面润湿的时间分辨x射线计算机断层扫描

IF 4.2 3区工程技术

Electrochemistry Communications Pub Date : 2025-12-01 Epub Date: 2025-10-24 DOI: 10.1016/j.elecom.2025.108065

Satoru Kato, Satoshi Yamaguchi, Yoriko Matsuoka, Akihiko Kato, Takahisa Suzuki, Yasutaka Nagai

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Corrigendum to “Illite-reinforced polymer/inorganic hybrid electrolytes for high-performance solid-state Lithium-metal batteries” [Electrochem. Commun. 181 (2025) 108075] “高性能固态锂金属电池用伊利石增强聚合物/无机杂化电解质”的勘误表[电化学]。common . 181 (2025) 108075]

IF 4.2 3区工程技术

Electrochemistry Communications Pub Date : 2025-12-01 Epub Date: 2025-11-05 DOI: 10.1016/j.elecom.2025.108076

Yujeong Yun , Jeong-Jin Yang , Jekyeong Yu , Sunkyung You , Jae-Kwang Kim , Young-Ran Lee , Seongki Ahn , Jinjoo Park , Hong-Il Kim

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In situ construction of a dual-metal 2D conjugated metal-organic framework on carbon paper for asymmetric supercapacitors 非对称超级电容器用碳纸双金属共轭金属有机骨架的原位构建

IF 4.2 3区工程技术

Electrochemistry Communications Pub Date : 2025-12-01 Epub Date: 2025-11-09 DOI: 10.1016/j.elecom.2025.108077

Liguo Qian , Zhikai Tong , Yunling Jia , Ying Li

{"title":"In situ construction of a dual-metal 2D conjugated metal-organic framework on carbon paper for asymmetric supercapacitors","authors":"Liguo Qian , Zhikai Tong , Yunling Jia , Ying Li","doi":"10.1016/j.elecom.2025.108077","DOIUrl":"10.1016/j.elecom.2025.108077","url":null,"abstract":"<div><div>Two-dimensional conjugated metal-organic frameworks (2D <em>c</em>-MOFs), with their excellent electrical conductivity, high porosity, large specific surface area, and tunable active sites, have emerged as promising electrode materials for supercapacitors. However, limited charge transport pathways and low electron mobility in single-metal 2D <em>c</em>-MOFs significantly restrict their energy storage performance. To overcome these limitations, we propose a universal and innovative strategy for constructing bimetallic 2D <em>c</em>-MOFs. Activated carbon paper (CP) was used as the substrate. By adjusting the ratios of different metal ions (M<sub>1</sub>/M<sub>2</sub> = Co, Cu, Ni), a bottom-up in situ self-assembly strategy was employed to synthesize three types of M<sub>1</sub>/M<sub>2</sub>-HHTP@CP electrode materials (Co/Ni-HHTP@CP, Co/Cu-HHTP@CP, Cu/Ni-HHTP@CP; HHTP = 2,3,6,7,10,11-hexahydroxytriphenylene). The results show that the synergistic effect of Co and Ni is stronger than that of Co/Cu or Cu/Ni. Furthermore, the strengthened chemical bonding between Co/Ni-HHTP and CP markedly enhances the stability and electron transport of the electrode, resulting in a high specific capacitance of 544 F g<sup>−1</sup> for Co/Ni-HHTP@CP. When assembled into an asymmetric supercapacitor (Co/Ni-HHTP@CP || AC), the device delivers a power density of 400 W kg<sup>−1</sup> and an energy density of 52.11 W h kg<sup>−1</sup>, while maintaining 93.02 % of its initial capacitance and 95.96 % Coulombic efficiency even after 5000 cycles. This study offers a new strategy for the rational design of bimetallic 2D <em>c</em>-MOFs-based supercapacitors.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"181 ","pages":"Article 108077"},"PeriodicalIF":4.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145526400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Electrolyte-dependent nitrogen bubble dynamics in hydrazine oxidation at Pt ultramicroelectrodes 铂超微电极上肼氧化中电解质依赖的氮泡动力学

IF 4.2 3区工程技术

Electrochemistry Communications Pub Date : 2025-12-01 Epub Date: 2025-10-26 DOI: 10.1016/j.elecom.2025.108074

Jihae Kim , Donghoon Han

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Label-free electrochemical immunosensing of cystatin C base on aptamer/gold/MXene nanoribbons 基于适体/金/MXene纳米带的胱抑素C的无标记电化学免疫传感

IF 4.2 3区工程技术

Electrochemistry Communications Pub Date : 2025-12-01 Epub Date: 2025-10-24 DOI: 10.1016/j.elecom.2025.108063

Yiting Wang , Yu Huang , Lingling Zhu , Xunyu Xu , Bin Qiu , Yuqing Chen , Qianshun Chen

{"title":"Label-free electrochemical immunosensing of cystatin C base on aptamer/gold/MXene nanoribbons","authors":"Yiting Wang , Yu Huang , Lingling Zhu , Xunyu Xu , Bin Qiu , Yuqing Chen , Qianshun Chen","doi":"10.1016/j.elecom.2025.108063","DOIUrl":"10.1016/j.elecom.2025.108063","url":null,"abstract":"<div><div>Cystatin C (Cys<img>C) is gaining prominence as a pivotal biomarker for evaluating gestational diabetes mellitus, a condition with profound implications for both maternal and fetal well-being. Herein, a facile and sensitive label-free electrochemical immunosensor for Cys-C was developed utilizing a modified electrode based on Ti₃C₂Tₓ MXene nanoribbons (TiC NRs) decorated with gold nanoparticles (Au NPs) (TiC NRs/Au) nanohybrids. Comprehensive characterization of the TiC NRs/Au hybrids was performed using scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and electrochemical techniques. The Cys-C specific aptamer (Apt) was immobilized onto the modified electrode surface via the formation of the Au<img>S bonds between the Au NPs and the thiolated Apt. Potassium ferrocyanide (K₄[Fe (CN)₆]) served as the electrochemical signal probe; binding of Cys-C to the immobilized Apt resulted in a measurable suppression of this probe's signal, thereby enabling target quantification. Following optimization of key assay parameters, the immunosensor demonstrated a broad linear detection range spanning 0.3 to 800 ng/mL and achieved a remarkably low detection limit of 0.1 ng/mL for Cys<img>C, underscoring the significant clinical diagnostic potential of this novel sensing strategy.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"181 ","pages":"Article 108063"},"PeriodicalIF":4.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145463721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Amperometric biosensors: Why might the response show a logarithmic dependence on analyte concentration? 安培生物传感器：为什么响应可能显示对分析物浓度的对数依赖？

IF 4.2 3区工程技术

Electrochemistry Communications Pub Date : 2025-12-01 Epub Date: 2025-10-22 DOI: 10.1016/j.elecom.2025.108064

Morgan P. Milner , Stanislav V. Sokolov , Richard G. Compton

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Illite-reinforced polymer/inorganic hybrid electrolytes for high-performance solid-state Lithium-metal batteries 用于高性能固态锂金属电池的伊利石增强聚合物/无机混合电解质

IF 4.2 3区工程技术

Electrochemistry Communications Pub Date : 2025-12-01 Epub Date: 2025-10-25 DOI: 10.1016/j.elecom.2025.108075

Yujeong Yun , Jeong-Jin Yang , Jekyeong Yu , Sunkyung You , Jae-Kwang Kim , Young-Ran Lee , Seongki Ahn , Jinjoo Park , Hong-Il Kim

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Accelerated degradation of carbon steel in seawater for the purpose of passive demolition of marine structures 用于被动拆除海洋结构物的碳钢在海水中的加速降解

IF 4.2 3区工程技术

Electrochemistry Communications Pub Date : 2025-12-01 Epub Date: 2025-10-25 DOI: 10.1016/j.elecom.2025.108066

Matthew J. Cullin , Raghu Srinivasan

{"title":"Accelerated degradation of carbon steel in seawater for the purpose of passive demolition of marine structures","authors":"Matthew J. Cullin , Raghu Srinivasan","doi":"10.1016/j.elecom.2025.108066","DOIUrl":"10.1016/j.elecom.2025.108066","url":null,"abstract":"<div><div>This work investigates electrochemical methods for accelerating the corrosion of plain carbon steel in seawater with the intention of informing efforts to passively demolish steel marine structures. The study examined both galvanic (dissimilar metal) and oxidizing chemical (non-galvanic) approaches to increasing the corrosion rate of plain carbon steel in seawater. Zero-resistance ammetry experiments showed that when coupled to plain carbon steel in substitute ocean [sea] water, Grade 2 titanium and 316 stainless steel increased the corrosion rate of plain carbon steel (over baseline) by 4.8x and 13x respectively. Polarization measurements were used to investigate the effect of oxidizing chemicals in substitute ocean [sea] water on the corrosion rate of plain carbon steel, in the absence of a galvanic couple. The most aggressive of the candidate species, 0.1M oxalic acid + 0.01M FeCl<sub>3</sub>, produced a plain carbon steel corrosion rate of 26.1 mpy. The results of this work indicate that both the titanium galvanic couple approach, and aggressive chemical approach (oxalic acid + ferric chloride), are viable options for the passive demolition of carbon steel marine structures.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"181 ","pages":"Article 108066"},"PeriodicalIF":4.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145526293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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