ChemElectroChem最新文献_第6页

Engineering Cu, Mn, and Co-Modified Graphene/Ferrites on Gas Diffusion Layers Electrodes for Efficient Electrocatalytic Nitrogen Reduction to Ammonia Cu， Mn和共改性石墨烯/铁氧体在气体扩散层电极上的高效电催化氮还原为氨

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-07-15 DOI: 10.1002/celc.202600005

Clécia Andrade dos Santos, Marina Medina, Luciane Pimenta Cruz Romão, Maria V. Boldrin Zanoni

{"title":"Engineering Cu, Mn, and Co-Modified Graphene/Ferrites on Gas Diffusion Layers Electrodes for Efficient Electrocatalytic Nitrogen Reduction to Ammonia","authors":"Clécia Andrade dos Santos, Marina Medina, Luciane Pimenta Cruz Romão, Maria V. Boldrin Zanoni","doi":"10.1002/celc.202600005","DOIUrl":"https://doi.org/10.1002/celc.202600005","url":null,"abstract":"Graphene with spinel ferrites (MFe2O4, M: Mn, Co, and Cu) is excellent low-cost material as electrocatalysts for ammonia synthesis. This study investigated the enhanced electrocatalytic efficiency of GDL/graphene-MnFe2O4, GDL/graphene-CoFe2O4, and GDL/graphene-CuFe2O4 for the reduction of nitrogen (N2) and addressed gaps in ammonia (NH3) synthesis via electrocatalytic N2 reduction, seeking decentralized, low-carbon alternatives to the Haber–Bosch process. The materials were synthesized using water rich in natural organic matter as a solvent and were deposited onto a gas diffusion layer (GDL) electrode using the drop-coating method. The main results highlighted the efficiency of all electrodes, but a higher yield was obtained for GDL/graphene-MnFe2O4, which reached 48 µg h−1 cm−2 and a faradaic efficiency of 56%. These findings highlight the influence of transition-metal substitution on the stability of ferrite compounds and illustrate a simple and cost-effective method for obtaining an efficient alternative for NH3 synthesis using electrocatalysts prepared from economic precursors.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 14","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202600005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148467535","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 Semi-Ionic C–F Bond Ratio of the Carbon Fluoride Cathodes With High Conductivity for Primary Lithium Batteries 提高一次锂电池高电导率氟化碳阴极半离子C-F键比

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-07-15 DOI: 10.1002/celc.70206

Junqian Liu, Qinhao Yang, Mengyao Li, Jingjing Wang, Wenbin Li, Ruixian Duan, Jun Li, Xifei Li

{"title":"Enhancing Semi-Ionic C–F Bond Ratio of the Carbon Fluoride Cathodes With High Conductivity for Primary Lithium Batteries","authors":"Junqian Liu, Qinhao Yang, Mengyao Li, Jingjing Wang, Wenbin Li, Ruixian Duan, Jun Li, Xifei Li","doi":"10.1002/celc.70206","DOIUrl":"https://doi.org/10.1002/celc.70206","url":null,"abstract":"For lithium/carbon fluoride (Li/CFX) battery, due to the strong covalent nature of the C–F bond, CFX exhibits very low electronic conductivity and is prone to polarization, resulting in poor rate performance of Li/CFX batteries, which cannot meet high-power discharge requirements. In this work, a sodium hydroxide (NaOH) reduction method is employed to chemically modify CFX with low-temperature calcination at 450°C. This process significantly increased the proportion of semi-ionic C–F bonds by 7%, while reducing the covalent C–F bonds by ≈20%. The increased semi-ionic C–F bond ratio enhances electron transport efficiency and facilitates Li+ diffusion, leading to substantially improved discharge voltage plateaus and specific capacities at high rates. The optimized CFX-Mg composite with 0.5% Mg doping achieves a maximum discharge rate of 15 C with a discharge capacity of 686 mAh g−1, an energy density of 1.09 × 103 Wh kg−1 at 0.5 C, and a peak power density of 1.68 × 104 W kg−1. Additionally, it demonstrates excellent performance across a wide temperature range (−10 to 60°C). This research provides a novel and effective approach for developing high-performance cathode materials for Li/CFX batteries.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 14","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70206","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148467536","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

Advances in High-Stability Oxygen Evolution Reaction Catalysts for Seawater Electrolysis 高稳定性海水电解析氧反应催化剂研究进展

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-07-15 DOI: 10.1002/celc.202500464

Huijun Xin, Lei Yang, Rui Wang, Tianshui Li, Haoran Sun, Li Dong, Linlin Zhou, Wei Liu, Yun Kuang

引用次数: 0

B-Modified Ti3C2Tx Electrode via H3BO3 Annealing Strategy for Enhanced Supercapacitance 基于H3BO3退火策略的b修饰Ti3C2Tx电极增强超级电容

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-07-15 DOI: 10.1002/celc.70215

Xiumei Chen, Xiaojie Xu, Xuexia He, Qi Li, Jie Sun, Zhibin Lei, Zong-HuaI Liu

{"title":"B-Modified Ti3C2Tx Electrode via H3BO3 Annealing Strategy for Enhanced Supercapacitance","authors":"Xiumei Chen, Xiaojie Xu, Xuexia He, Qi Li, Jie Sun, Zhibin Lei, Zong-HuaI Liu","doi":"10.1002/celc.70215","DOIUrl":"https://doi.org/10.1002/celc.70215","url":null,"abstract":"Although Ti3C2Tx is an exceptional energy storage material due to its high capacitance, tunable surface functional groups, and excellent electrical conductivity, a disordered interfacial environment caused by the inherent surface terminal groups on the Ti3C2Tx nanosheets causes the slowing of the ion transport kinetics and decrease of the specific capacitance. A simple boron modified Ti3C2Tx surface strategy is developed to covalently anchor boron species onto the Ti3C2Tx surface via B–O–Ti bonds in the present work, B modified Ti3C2Tx electrode material (B-Ti3C2Tx−400) is obtained and its structure, surface chemistry, and the electrochemical performance are systematically investigated. The modified boron species reorganize the local interfacial environment of Ti3C2Tx nanosheets, reduce ion diffusion resistance, and enhance accessibility of active sites, thus significantly improve the specific capacitance and rate performance, and the as-prepared B-Ti3C2Tx−400 material electrode exhibits a high specific capacitance of 491 F g−1. Moreover, the assembled B-Ti3C2Tx-400-based symmetric supercapacitor achieves an energy density of 7.94 Wh kg−1 (at 400 W kg−1) and retains 88.5% of its initial capacitance over 10,000 charge–discharge cycles at 50 mV s−1. This work offers a facile and practical strategy for optimizing the energy storage performance of Ti3C2Tx-based energy storage materials through surface chemical modification approach.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 14","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70215","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148467537","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

Getting the Most of Your Catalyst: How Process Parameters and Pulse Procedures Affect the Performance of eCO2R 充分利用催化剂：工艺参数和脉冲程序如何影响eCO2R的性能

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-07-14 DOI: 10.1002/celc.70275

Florian Pradellok, Jan Hüwels, Matthias Wessling, Robert Keller

{"title":"Getting the Most of Your Catalyst: How Process Parameters and Pulse Procedures Affect the Performance of eCO2R","authors":"Florian Pradellok, Jan Hüwels, Matthias Wessling, Robert Keller","doi":"10.1002/celc.70275","DOIUrl":"https://doi.org/10.1002/celc.70275","url":null,"abstract":"Electrochemical pathways that convert CO2 into multi-carbon (C2+) products could mitigate greenhouse gas emissions while supplying chemical building blocks. Realizing this potential requires scalable process designs and optimized operating strategies, including dynamic modes such as pulsed current. Here, we systematically investigate the effects of current density, electrolyte temperature, CO2 excess rate, and pulsed operation on C2+ production in a commercially available flow cell equipped with gas diffusion electrodes (GDEs) and industrially relevant materials. High current densities up to 400 mA cm−2 significantly increased the Faradaic efficiency toward C2+ products. Lower electrolyte temperature (20 °C) enhanced C2+ production compared to 40 °C, likely due to greater CO2 solubility and CO adsorption, which promote CO dimerization. A reduced CO2 excess rate (λ = 2) further favored C2+ formation, potentially by decreasing CO2 adsorption in favor of CO surface coverage. Contrary to prior reports in H-type cells, pulsed current operation did not improve C2+ production in the GDE-equipped flow cell, suggesting that enhanced mass transport minimizes pulsing benefits observed in diffusion-limited systems. This study identifies low temperature, reduced CO2 excess, and statically applied high current densities as key parameters for enhancing C2+ formation under scalable conditions.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 14","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70275","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148467023","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

A Porous Kevlar Separator for Impact-Tolerant Lithium-Ion Batteries 用于耐冲击锂离子电池的多孔凯夫拉隔膜

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-07-14 DOI: 10.1002/celc.70272

Zhiqi Chen, Yunfeng Chao, Yeqing Xu, Gordon G. Wallace, Jie Ding, Caiyun Wang

引用次数: 0

Importance of Interfacial and Intraparticle Conductivity Enhancement in the Electrochemical Response of Composite Electrode Materials in 3D-Printed Supercapacitors 3d打印超级电容器复合电极材料界面和颗粒内电导率增强在电化学响应中的重要性

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-07-09 DOI: 10.1002/celc.70266

Matthew Ferguson, Alex Lonergan, Colm O’Dwyer

{"title":"Importance of Interfacial and Intraparticle Conductivity Enhancement in the Electrochemical Response of Composite Electrode Materials in 3D-Printed Supercapacitors","authors":"Matthew Ferguson, Alex Lonergan, Colm O’Dwyer","doi":"10.1002/celc.70266","DOIUrl":"https://doi.org/10.1002/celc.70266","url":null,"abstract":"Enhancing conductivity is important for supercapacitor electrochemical behavior, and this is especially evident when using nonmetallic 3D printed cell components. Here, we study two different 3D-printed cell types and examine the influence of the conductivity enhancement of the printed current collector and the slurry composition on the response of supercapacitor cells. Current collectors printed using vat polymerization and subsequently metallized, and similar collectors made using conductive polylactic acid by fused deposition modeling, are compared in a similarly designed printed coin cells. Various slurry mixtures of porous Mn3O4 with carbon electrode materials and additives (single-walled carbon nanotubes, graphene nanoplatelets (GNPs), and Super-P) bound with PVDF are compared in both types of cell. Electrochemical analysis using cyclic voltammetry and galvanostatic charge–discharge measurements reveals that composite conductivity strongly influences charge storage behavior in 3D-printed supercapacitors, while the conductivity of the current collector interface influences rate capability, ohmic losses, and long-term cycling stability. Metallized Vat-P printed current collectors, with smoother and entirely conductive interface with the composite material, offer improved voltammetric and galvanostatic stability and response for all slurries. Whereas FDM printed, rough PLA current collectors with sparsely distributed graphitic surface contacts to the electrode material, show poorer stability during long-term cycling and rate tests.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 14","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70266","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148466622","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

Highly Sensitive Electrochemical Detection of 2,4-Dichlorophenoxyacetic Acid Using Bare Screen-Printed Carbon Electrode 裸网印刷碳电极对2,4-二氯苯氧乙酸的高灵敏度电化学检测

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-07-09 DOI: 10.1002/celc.70271

Al-Monsur Jiaul Haque, Connor Sullivan, Eric Brack, Jayant Kumar, Ramaswamy Nagarajan, Pradeep Kurup

{"title":"Highly Sensitive Electrochemical Detection of 2,4-Dichlorophenoxyacetic Acid Using Bare Screen-Printed Carbon Electrode","authors":"Al-Monsur Jiaul Haque, Connor Sullivan, Eric Brack, Jayant Kumar, Ramaswamy Nagarajan, Pradeep Kurup","doi":"10.1002/celc.70271","DOIUrl":"https://doi.org/10.1002/celc.70271","url":null,"abstract":"We report an electrochemical method for the highly sensitive detection of the widely used chlorinated aromatic herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) using a bare screen-printed carbon electrode. Experimental conditions were optimized, yielding a pulse amplitude of 150 mV, a sample of pH of 2.0, and an electrolyte concentration of 0.5 M. Under these conditions, the method exhibited a linear response from 2 to 100 µM (R2 = 0.9963), with an LOQ of 2.1 µM and an LOD of 0.7 µM. The sensitivity of the sensor is 0.8055 µA µM−1, and the sensitivity normalized for the active surface area of the electrode is 6.2 µA µM−1 cm−2. The overall performance of the proposed method is better or similar, compared to some of the modified electrodes used in recent studies reported in the literature for 2,4-D sensing. The method showed good electrode-to-electrode reproducibility of the signal and reusability of the sensor for the detection of 2,4-D in different solutions using the same electrode. The developed method also showed acceptable percentage recoveries (ranging from 80.1% to 112.0 %) when used for the detection of 2,4-D spiked in real water samples from different sources.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 14","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70271","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148466623","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 and Cu Oxalates in Li-Ion Battery Electrolytes: Comparative Observations and Recycling Consequences 锂离子电池电解质中的Al和Cu草酸盐：比较观察和回收后果

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-07-09 DOI: 10.1002/celc.70273

Anna Rollin, Janina Gottschalk, Michael Kurrat, Petr Novák

{"title":"Al and Cu Oxalates in Li-Ion Battery Electrolytes: Comparative Observations and Recycling Consequences","authors":"Anna Rollin, Janina Gottschalk, Michael Kurrat, Petr Novák","doi":"10.1002/celc.70273","DOIUrl":"https://doi.org/10.1002/celc.70273","url":null,"abstract":"Given that Li-ion batteries are rapidly increasing in their spread, effective recycling approaches and thus contamination management of the recycled material have become essential. We investigated oxalate-based recycling options using metal oxalates (focusing on Al and Cu) as model impurities in graphite || LiNi0.8Mn0.1Co0.1O2 (NMC811) full cells. Fresh 1 M LiPF6 in 50/50 v/v ethylene carbonate/dimethyl carbonate (LP30) electrolytes without and with contaminants at their maximum solubility were compared with aged electrolytes. Electrochemical testing revealed that aged LP30-based contaminated electrolytes matched cells with freshly contaminated electrolytes: they retain the same capacity and have matching impedance spectra. In the absence of vinylene carbonate (VC), neither is time-dependent degradation detectable nor does metal oxalate contamination impair cell performance. Chemical analyses confirmed that no detectable chemical reactions occurred between any metal oxalate and the VC-free electrolyte during the 30-day aging period. In contrast, when VC was present, adding Al or Cu oxalate to the electrolyte increased internal cell resistance and accelerated capacity fade during cell cycling. Post-mortem analyses revealed Al-containing surface layers on graphite electrodes, indicating that performance decreases because Al oxalate-derived films are formed. These results highlight the complex interplay between electrolyte additives and impurity specification in battery aging.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 14","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70273","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148466621","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

“Innocent” Electrolytes Can Influence Organic Electrosynthetic Selectivity “无害”电解质可以影响有机电合成的选择性

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-07-06 DOI: 10.1002/celc.70267

Zachary A. Nguyen, Nhu H. Quach, Mayank Tanwar, Joshua A. Beeler, Kevin McFadden, Dylan G. Boucher, Matthew Neurock, Shelley D. Minteer

{"title":"“Innocent” Electrolytes Can Influence Organic Electrosynthetic Selectivity","authors":"Zachary A. Nguyen, Nhu H. Quach, Mayank Tanwar, Joshua A. Beeler, Kevin McFadden, Dylan G. Boucher, Matthew Neurock, Shelley D. Minteer","doi":"10.1002/celc.70267","DOIUrl":"https://doi.org/10.1002/celc.70267","url":null,"abstract":"Organic electrosynthesis has emerged as a powerful strategy for leveraging electricity in organic synthesis. Despite its growing popularity, the fundamental molecular interactions governing electrochemical systems remain poorly understood. Many electrosynthetic reactions show strong dependence on the identity of the allegedly inert supporting electrolyte, which can significantly impact yields and selectivity, yet the physical origins of these effects are largely unexplored. A mechanistic understanding of electrolyte effects would enable more rational reaction design for applications. Here, we use cyclic voltammetry to investigate cobalt-based metal–carbon bond homolysis and elucidate how common supporting electrolytes influence reaction rates. Bulk electrolysis experiments further reveal how electrolyte choice affects overall selectivity. Peak-ratio analysis indicates that Co(Salen)–benzyl bond cleavage proceeds via a reversible homolysis mechanism that becomes rate-limited by bond dissociation at high substrate concentrations. The reaction rate varies systematically with electrolyte identity, and changes in oxidative addition rates are quantified using simulations. These experimental findings are supported by ab initio and classical molecular dynamics simulations, as well as density functional theory calculations, which provide insights into reaction pathways, energetics, and dynamics. Together, these results demonstrate that electrolyte selection enables rational tuning of reaction rates and downstream selectivity, highlighting the critical role of electrolytes in metal-catalyzed organic electrosynthesis.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 14","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70267","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148462800","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