ChemElectroChem最新文献_第10页

Coupling Anodic Reactions in Electrochemical Nitrate Reduction to Ammonia 电化学硝酸还原制氨的耦合阳极反应

IF 3.5 4区化学

ChemElectroChem Pub Date : 2025-02-28 DOI: 10.1002/celc.202400605

Chaeeun Lim, Hyein Jo, Prof. Kijung Yong

{"title":"Coupling Anodic Reactions in Electrochemical Nitrate Reduction to Ammonia","authors":"Chaeeun Lim, Hyein Jo, Prof. Kijung Yong","doi":"10.1002/celc.202400605","DOIUrl":"https://doi.org/10.1002/celc.202400605","url":null,"abstract":"Ammonia is a widely produced chemical globally, primarily used in fertilizers and chemical products. Recently, it has gained attention as a green hydrogen carrier due to its high hydrogen content and energy density. However, the conventional Haber-Bosch process for ammonia synthesis is energy-intensive, requiring high temperatures and pressures. Also, it is a significant source of CO2 emissions. To address these environmental concerns, the electrochemical nitrate reduction reaction (NO3RR) has emerged as a promising approach for green ammonia production, utilizing nitrate from wastewater and renewable energy sources. While most previous research focuses on cathodic ammonia production, it needs to emphasize the importance of optimizing anodic reactions in NO3RR systems to reduce energy consumption and improve efficiency. The conventional oxygen evolution reaction (OER), typically coupled with NO3RR, is kinetically slow and requires a high standard potential. Therefore, alternative anodic reactions with lower standard potentials not only save energy but also yield valuable byproducts. Furthermore, coupling NO3RR with anodic reactions like zinc oxidation allows for power generation, where a positive cell potential indicates spontaneous reactions. This dual approach, energy saving and generation, opens new pathways for sustainable ammonia production, reducing overall energy demands while supporting the shift toward green ammonia systems.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"12 8","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202400605","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143826991","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}

引用次数: 0

Simultaneous Electrochemical Detection of Puerarin and Daidzein by Ag Nanoparticles and CuO Nanowires Coated ZnO Nanorod Arrays Self-Supporting Electrode 银纳米粒子和氧化铜纳米线包覆ZnO纳米棒阵列自支撑电极同时检测葛根素和大豆苷元

IF 3.5 4区化学

ChemElectroChem Pub Date : 2025-02-28 DOI: 10.1002/celc.202400592

Jiaqiang Liu, Qi Ai, Yuanxia Zuo, Xinhui Zhao, Qilong Wu, Mingyan Wang, Jun Chen

{"title":"Simultaneous Electrochemical Detection of Puerarin and Daidzein by Ag Nanoparticles and CuO Nanowires Coated ZnO Nanorod Arrays Self-Supporting Electrode","authors":"Jiaqiang Liu, Qi Ai, Yuanxia Zuo, Xinhui Zhao, Qilong Wu, Mingyan Wang, Jun Chen","doi":"10.1002/celc.202400592","DOIUrl":"https://doi.org/10.1002/celc.202400592","url":null,"abstract":"In this study, ZnO nanorods (ZnONR) were directly grown on carbon fiber paper (CFP), followed by the uniform chemical deposition of CuO nanowires (CuONW) and subsequent hydrothermal synthesis of Ag nanoparticles (AgNP) to form the ternary composite electrode AgNP-CuONW/ZnONR@CFP. When the prepared electrodes were investigated as a non-enzyme biosensor, two distinct and separated differential pulse voltammetric peaks for puerarin (PU) and daidzein (DAI) were observed, indicating that the simultaneous and selective detection of both isoflavones was feasible. The sensor exhibited a linear response across a broad concentration range of 0.01 to 30 μmol/L for puerarin (PU) and 0.05 to 15 μmol/L for daidzein (DAI), with detection limits of 4.0 nmol/L for PU and 17.8 nmol/L for DAI, respectively. Additionally, when used to detect puerarin (PU) and daidzein (DAI) in traditional Chinese medicine samples, the sensor performed excellently, yielding results that consistent with those obtained from high-performance liquid chromatography (HPLC) analysis.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"12 7","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202400592","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770535","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}

引用次数: 0

Al-Rich Cu/CuOx Catalyst in a CO2-Reduction Tandem Electrolyzer with CO-Enriched Gas Feed for Enhanced C2+-Products Selectivity 富al Cu/CuOx催化剂在co -富co气进料co2还原串联电解槽中的应用

IF 3.5 4区化学

ChemElectroChem Pub Date : 2025-02-25 DOI: 10.1002/celc.202400664

Jonas Weidner, Christian N. Tchassem, Debanjan Das, Ridha Zerdoumi, Guilong Lu, Xin Wang, Martin Muhler, Nivedita Sikdar, Wolfgang Schuhmann

{"title":"Al-Rich Cu/CuOx Catalyst in a CO2-Reduction Tandem Electrolyzer with CO-Enriched Gas Feed for Enhanced C2+-Products Selectivity","authors":"Jonas Weidner, Christian N. Tchassem, Debanjan Das, Ridha Zerdoumi, Guilong Lu, Xin Wang, Martin Muhler, Nivedita Sikdar, Wolfgang Schuhmann","doi":"10.1002/celc.202400664","DOIUrl":"https://doi.org/10.1002/celc.202400664","url":null,"abstract":"Electrochemical CO2 conversion is an important strategy to produce high-value carbon-containing molecules, such as ethylene and ethanol. Despite huge progress in recent years concerning CO2 reduction catalyst development with increased selectivity, high selectivity for C2+ products at high current densities is still a challenge. We report the development and optimization of a new surface Al-rich Cu/CuOx catalyst with high selectivity for C2+-products at high current densities of up to −800 mA cm−2. We integrated the corresponding catalyst-modified gas-diffusion electrode into a second flow-through electrolyzer, which was connected to a first flow-through electrolyzer comprising a highly CO-selective Ni−Cu dual-atom N-doped carbon catalyst. The enrichment of the CO2 stream with CO generated at a current density of −400 mA cm−2 in the first electrolyzer increased the production rate of ethanol formation at the Al-rich Cu/CuOx catalyst at a current density of −300 mA cm−2 by 28 %, while maintaining the production rate of ethylene. Thereby, the overall yield of C2+-products obtained by CO2 reduction was significantly increased.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"12 7","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202400664","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770515","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}

引用次数: 0

Kinetic and Mechanistic Investigation of Cobalt Oxide Hydroxide Thin Films by Square-Wave Voltammetry and Multi-Frequency Electrochemical Faradaic Spectroscopy 方波伏安法和多频电化学法拉第光谱法研究氢氧化钴薄膜的动力学和机理

IF 3.5 4区化学

ChemElectroChem Pub Date : 2025-02-25 DOI: 10.1002/celc.202400694

Franz Glaubitz, Erik Lindemann, Valentin Mirceski, Uwe Schröder

{"title":"Kinetic and Mechanistic Investigation of Cobalt Oxide Hydroxide Thin Films by Square-Wave Voltammetry and Multi-Frequency Electrochemical Faradaic Spectroscopy","authors":"Franz Glaubitz, Erik Lindemann, Valentin Mirceski, Uwe Schröder","doi":"10.1002/celc.202400694","DOIUrl":"https://doi.org/10.1002/celc.202400694","url":null,"abstract":"In this study, a detailed investigation of the redox behavior of cobalt(II/III) oxide-hydroxide is presented. With the enhanced sensitivity and unique pulse nature of square-wave voltammetry (SWV), two distinct electrode processes could be observed, proposing a two-step oxidation of Co(OH)2 according to: Co(OH)2→CoO(OH)→CoO2. In the initial scan of cyclic voltammetry, Co(OH)2 is irreversibly oxidized to CoO(OH) with the quasireversible Co3O4/CoO(OH) redox system prevailing in subsequent scans. The system was further kinetically characterized. Theoretical studies and the unique peak splitting in SWV revealed that the electrode reaction is associated with an anodic charge transfer coefficient of <math></math>\u0000=0.59 and an apparent standard rate constant of ks,app=(2.9±0.1) ⋅ 10−5 cm s−1. To cope with the complexity of the electrode process pertinent to the redox couple Co3O4/CoO(OH), the recently introduced and advanced multi-frequency electrochemical Faradaic spectroscopy (MEFS) was applied. With rapid measurement times of only 4 s, compared to multiple, hour-long experiments for square-wave and cyclic voltammetry, an apparent standard rate constant of ks,app=(2.2±0.2) ⋅ 10−5 cm s−1 was obtained with MEFS, which is quite close to the established methods, highlighting the advantages of this novel square-wave derived technique.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"12 9","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202400694","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143905397","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}

引用次数: 0

High-Entropy Halides for Intercalation Battery Electrode Materials 用于嵌入电池电极材料的高熵卤化物

IF 3.5 4区化学

ChemElectroChem Pub Date : 2025-02-21 DOI: 10.1002/celc.202400659

Sebastian Schumacher, Dr. Evgeny V. Alekseev, Dr. Shicheng Yu, Dr. Hermann Tempel, Prof. Dr. Rüdiger-A. Eichel

{"title":"High-Entropy Halides for Intercalation Battery Electrode Materials","authors":"Sebastian Schumacher, Dr. Evgeny V. Alekseev, Dr. Shicheng Yu, Dr. Hermann Tempel, Prof. Dr. Rüdiger-A. Eichel","doi":"10.1002/celc.202400659","DOIUrl":"https://doi.org/10.1002/celc.202400659","url":null,"abstract":"The potential use of high-entropy materials in batteries has recently attracted considerable interest. Compared to traditional materials, high-entropy materials exhibit a high defect density and degree of internal entropy, resulting in enhanced ion storage capabilities, ionic conductivity, and electrochemical stability. High-entropy oxides represent a more extensively investigated material for various electrochemical applications, particularly for potential use as a cathode or electrolyte in battery applications. These multicomponent systems are distinguished by their structural complexity and exhibit enhanced cycling stability, exceeding the performance of traditional oxide materials. The exploration of high-entropy halides as electrode materials is less extensive than that of their traditional counterparts, despite the latter being the subject of considerable research. This work offers a concise overview of how high-entropy materials can be applied to halide phases, focusing on the transition from high-entropy oxides to high-entropy halides.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"12 9","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202400659","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143905370","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}

引用次数: 0

ECL-Based Readout of Electric Field-Induced Fine-Tuning of Redox Activity 基于ecl的电场诱导氧化还原活性微调读数

IF 3.5 4区化学

ChemElectroChem Pub Date : 2025-02-21 DOI: 10.1002/celc.202500012

Changlin Zhou, Leslie R. Arias-Aranda, Dr. Gerardo Salinas, Dr. Laurent Bouffier, Prof. Dr. Zonghua Wang, Prof. Dr. Alexander Kuhn, Prof. Dr. Neso Sojic

{"title":"ECL-Based Readout of Electric Field-Induced Fine-Tuning of Redox Activity","authors":"Changlin Zhou, Leslie R. Arias-Aranda, Dr. Gerardo Salinas, Dr. Laurent Bouffier, Prof. Dr. Zonghua Wang, Prof. Dr. Alexander Kuhn, Prof. Dr. Neso Sojic","doi":"10.1002/celc.202500012","DOIUrl":"https://doi.org/10.1002/celc.202500012","url":null,"abstract":"Magnesium, a highly reactive alkaline earth metal, acts spontaneously as a strong reducing agent. In this work, the redox reactivity of Mg is fine-tuned selectively in a wireless manner by means of bipolar electrochemistry (BE). This is demonstrated by mapping the spatial electroactivity of Mg via the electrochemiluminescence (ECL) emission of the Ru(bpy)32+/S2O82− system. Asymmetric ECL patterns are obtained by controlling the applied external electric field. The ECL intensity is increased by up to approximately 80 % at the cathodic extremity whereas a 50 % decrease is observed at the anodic side of a bipolar electrode. Additionally, the influence of the spatial distribution of the electric field on the reactivity of Mg and its concomitant ECL emission is evaluated, producing complex luminescent patterns. These findings, illustrate the wireless modulation of redox reactivity by BE.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"12 11","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202500012","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144256475","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}

引用次数: 0

Electrochemical Borylation of C−C and C−Het Bonds C - C和C - Het键的电化学硼化反应

IF 3.5 4区化学

ChemElectroChem Pub Date : 2025-02-19 DOI: 10.1002/celc.202400560

Tsoh Lam Cheung, Hairong Lyu

引用次数: 0

Quantifying the Impact of Oxidative Treatments on Electrode Overpotentials in the All-Vanadium Redox Flow Battery 量化氧化处理对全钒氧化还原液流电池电极过电位的影响

IF 3.5 4区化学

ChemElectroChem Pub Date : 2025-02-19 DOI: 10.1002/celc.202400620

Ridge M. Bachman, Peter Samora Owuor, Abdullah Khan, Derek M. Hall

{"title":"Quantifying the Impact of Oxidative Treatments on Electrode Overpotentials in the All-Vanadium Redox Flow Battery","authors":"Ridge M. Bachman, Peter Samora Owuor, Abdullah Khan, Derek M. Hall","doi":"10.1002/celc.202400620","DOIUrl":"https://doi.org/10.1002/celc.202400620","url":null,"abstract":"Despite the commercialization of flow batteries, little is known about how much electrode treatment methods affect individual electrode overpotential contributions. Thermal oxidation is one of the most common electrode treatment methods in literature, which has increased the energy efficiencies of vanadium redox flow batteries (VRFBs) by 10 to 20 % depending on their operating current density. However, it is unclear how much electrode overpotential remains after these treatments, which is critical to identifying viable pathways for further improvement. Herein, we demonstrate how membrane-based reference electrodes provide an opportunity to examine individual electrode overpotentials during operation to gain deeper insights into their role in battery performance. Without oxidative treatments, negative electrode overpotential contributions range from 150 to 250 mV depending on the operating current density, overshadowing positive electrode contributions. Use of oxidative treatment reduced negative electrode contributions by nearly 50 % percent from their initial values but marginally increased positive electrode overpotential values. Treating the negative electrode while leaving the positive electrode untreated resulted in the best performance observed but still had 150 to 300 mV of electrode overpotentials remaining, suggesting that additional electrode improvements can still provide significant gains in energy efficiency.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"12 7","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202400620","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770520","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}

引用次数: 0

Enhancing Sodium Ion Battery Performance through Biphasic Layered Oxide Cathodes 通过双相层状氧化物阴极提高钠离子电池性能

IF 3.5 4区化学

ChemElectroChem Pub Date : 2025-02-18 DOI: 10.1002/celc.202400657

Seung-Jun Kang, Sung-Joon Park, Kwan Woo Nam, Seung-Ho Yu

引用次数: 0

Front Cover: Perovskite Oxides for Electrocatalytic Hydrogen/Oxygen Evolution Reaction (ChemElectroChem 4/2025) 封面：用于电催化析氢/析氧反应的钙钛矿氧化物（ChemElectroChem 4/2025）

IF 3.5 4区化学

ChemElectroChem Pub Date : 2025-02-17 DOI: 10.1002/celc.202580401

Lu Lu, Mingzi Sun, Tong Wu, Qiuyang Lu, Baian Chen, Cheuk Hei Chan, Hon Ho Wong, Zikang Li, Bolong Huang

引用次数: 0