ChemElectroChem最新文献_第4页

Electrochemically Reduced Graphene Oxide as a Support for Polyaniline-Coated Gold Nanoparticles in Non-Enzymatic EC-SERS Detection of Hydrogen Peroxide 电化学还原氧化石墨烯作为聚苯胺包覆金纳米粒子在非酶EC-SERS检测过氧化氢中的载体

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-08-25 DOI: 10.1002/celc.70278

Kacper Jędrzejewski, Krystian Pupel, Barbara Pałys

{"title":"Electrochemically Reduced Graphene Oxide as a Support for Polyaniline-Coated Gold Nanoparticles in Non-Enzymatic EC-SERS Detection of Hydrogen Peroxide","authors":"Kacper Jędrzejewski, Krystian Pupel, Barbara Pałys","doi":"10.1002/celc.70278","DOIUrl":"https://doi.org/10.1002/celc.70278","url":null,"abstract":"Hydrogen peroxide is an important reactive oxygen species involved in oxidative stress, enzymatic reactions, food processing, and environmental monitoring; therefore, sensitive and operationally stable methods for its determination remain relevant in electroanalytical chemistry. Here, we report an enzyme-free electrochemical surface-enhanced Raman spectroscopy (EC-SERS) platform based on screen-printed gold electrodes modified with ultrathin graphene oxide (GO) or electrochemically reduced graphene oxide (ERGO) layers and polyaniline-coated gold nanoparticles (PANI@AuNPs) as redox-active Raman nanoprobes. H2O2 was quantified indirectly using the ratiometric SERS marker I1565/I1595, which reflects the conversion of reduced/benzenoid PANI domains into oxidized/quinoid structures rather than direct detection of a characteristic H2O2 Raman band. The ERGO-based platform provided an H2O2 detection limit of 8.13 × 10−7 M and excellent linearity over the 10−6–10−2 M range. Compared with the previously reported horseradish peroxidase (HRP)–assisted system, it offers an enzyme-free alternative with simpler preparation and improved tolerance to millimolar H2O2 concentrations, where the enzyme is inhibited. Preliminary matrix tolerance tests showed that the response in tap water was comparable to that in PBS, while diluted milk caused an approximately 10.5% decrease in the ratiometric signal, supporting the potential applicability of the PANI@AuNPs/ERGO platform in environmental water and selected food–related matrices.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 17","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70278","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148848816","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

Layer-By-Layer Self-Assembled Nickel Hexacyanoferrate Electrodes Coupled With Polypyrrole for Battery-Type Sodium Ion Exchange Systems 电池型钠离子交换系统的聚吡咯偶联层自组装六氰酸镍电极

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-08-24 DOI: 10.1002/celc.70292

Henry Michel Zelada Romero, Pablo Curyk, Ernesto Julio Calvo, Valeria Carolina Estefania Romero

{"title":"Layer-By-Layer Self-Assembled Nickel Hexacyanoferrate Electrodes Coupled With Polypyrrole for Battery-Type Sodium Ion Exchange Systems","authors":"Henry Michel Zelada Romero, Pablo Curyk, Ernesto Julio Calvo, Valeria Carolina Estefania Romero","doi":"10.1002/celc.70292","DOIUrl":"https://doi.org/10.1002/celc.70292","url":null,"abstract":"The growing demand for sustainable energy storage and efficient desalination technologies has driven the development of electrochemical systems capable of addressing both challenges. In this work, nickel hexacyanoferrate (NiHCF) electrodes were supported on graphite felt using the layer-by-layer (LbL) electrostatic self-assembly technique and compared with electrodes obtained by ink impregnation. The LbL electrodes show a significant improvement in electrochemical performance, reaching up to 83% of the theoretical capacity, compared to 53% in electrodes prepared by ink impregnation. This improvement is attributed to a more homogeneous and conformal distribution of the active material, which favors accessibility to the active sites and reduces polarization, consistent with electron microscopy analyses and charge–discharge profiles. The influence of the counter electrode and the number of deposited bilayers was also evaluated. The use of polypyrrole (PPy) as a chloride reversible counter electrode increases the capacity of the system, while symmetrical NiHCF/NiHCF “rocking-chair” configurations exhibit greater cyclic stability. Specific capacity scales with the number of layers without significant diffusion limitations. LbL electrodes show good capacity at various currents and stability over 200 cycles and perform ion removal in desalination tests in undivided, membrane-less hybrid LbL NiHCF-PPy flow system, highlighting their potential for sodium storage and electrochemical desalination.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 17","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70292","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148848803","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

Indium-Induced Electronic Structure Engineering of In3Ni2/NiPx for Alleviating Kinetic Mismatch in Alkaline Hydrogen Evolution 缓解碱氢析氢动力学失配的铟诱导In3Ni2/NiPx电子结构工程

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-08-20 DOI: 10.1002/celc.70286

Yutian Ma, Tao Yang, Qiuling Ma, GuiFa Long, Chunyang Zhao, Junhu Ma, Hongfu Gao, Chen Cao, Zelong Li

{"title":"Indium-Induced Electronic Structure Engineering of In3Ni2/NiPx for Alleviating Kinetic Mismatch in Alkaline Hydrogen Evolution","authors":"Yutian Ma, Tao Yang, Qiuling Ma, GuiFa Long, Chunyang Zhao, Junhu Ma, Hongfu Gao, Chen Cao, Zelong Li","doi":"10.1002/celc.70286","DOIUrl":"https://doi.org/10.1002/celc.70286","url":null,"abstract":"Developing efficient and sustainable energy conversion technologies is critical to global energy and environmental remediation. Electrocatalytic water splitting has emerged as a promising route for green hydrogen supply. Nevertheless, alkaline HER performance is greatly limited by sluggish water dissociation. An inherent kinetic mismatch persists between water activation and hydrogen evolution. Nickel phosphide (NiPx) catalysts are widely investigated for alkaline hydrogen evolution reaction (HER). They possess favorable hydrogen adsorption capability and low fabrication cost. Herein, an In3Ni2/NiPx catalyst was fabricated on CP via a one-step electrodeposition strategy. The catalyst delivers outstanding alkaline HER performance, requiring low overpotentials of 55 mV to achieve current densities of 10 mA cm−2, respectively. Long-term stability is maintained within 210 h. XPS and EXAFS characterizations reveal that indium (In) introduction trigger significant electronic structure reconstruction and charge redistribution. Key intermediates including H*, OH* and H2O* show optimized adsorption after In introduction. Water dissociation energy barrier is reduced to 0.78 eV. Hydrogen adsorption free energy is adjusted to a near-thermoneutral value of 0.02 eV. Heterometal modification offers a feasible strategy to tune reaction kinetics. It also provides a rational design route for high-performance alkaline HER catalysts.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 17","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70286","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148784663","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 Performance Screening of Cu-Based Multimetal Electrocatalysts for CO2 Reduction cu基多金属CO2还原电催化剂的电化学性能筛选

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-08-20 DOI: 10.1002/celc.70293

Ann Cathrin Brix, Muhammad Adib Abdillah Mahbub, Anirudha Shekhawat, Wolfgang Schuhmann

{"title":"Electrochemical Performance Screening of Cu-Based Multimetal Electrocatalysts for CO2 Reduction","authors":"Ann Cathrin Brix, Muhammad Adib Abdillah Mahbub, Anirudha Shekhawat, Wolfgang Schuhmann","doi":"10.1002/celc.70293","DOIUrl":"https://doi.org/10.1002/celc.70293","url":null,"abstract":"Targeting the electrocatalytic CO2 reduction reaction (eCO2RR) using complex multimetal catalysts is a relatively new approach in electrocatalyst design. We explored the eCO2RR performance for lanthanoids and similar rare-earth elements such as Gd, Sc, Tb, Nd, Sm, and Y as components in CuAgAl catalyst mixtures. Product selectivity is highly sensitive to the complexity of the catalysts (i.e. the number and identity of constituting elements) and the potential (activity) controlled by the compositions. Particularly, most of the Gd-containing catalysts showed high Faradaic efficiency (FE) for C2+ products (FEC2+), >60%, at a current density of −400 mA cm−2. Using mean absolute error analysis, we investigated the correlation between multimetal composition, product selectivity, and required potential at a defined current density. The modulation in product distribution is likely promoted by the distinct properties of the multimetal catalysts. Operando Raman measurements of two multimetal catalysts (Cu80Ag5Al5Gd5Sm5 and Cu80Ag5Al5Nd5Sm5) revealed different mechanisms shown by the variations in the local alkalinity of the microenvironments and catalyst reconstruction, despite both catalysts exhibit an FEC2+ of 65%. Exploring multimetal catalysts expands the design space for elemental selection, allowing for distinct mechanisms that expand the understanding of selectivity modulation.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 17","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70293","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148784736","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

Rational Design of Trimetallic Alloy for a High-Performance and Selective Nitrogen Reduction Electrocatalysis 高性能选择性氮还原电催化用三金属合金的合理设计

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-08-16 DOI: 10.1002/celc.70288

Muzammil Hussain, Kassa Belay Ibrahim, Tofik Ahmed Shifa, Alberto Vomiero, Elisa Moretti

{"title":"Rational Design of Trimetallic Alloy for a High-Performance and Selective Nitrogen Reduction Electrocatalysis","authors":"Muzammil Hussain, Kassa Belay Ibrahim, Tofik Ahmed Shifa, Alberto Vomiero, Elisa Moretti","doi":"10.1002/celc.70288","DOIUrl":"https://doi.org/10.1002/celc.70288","url":null,"abstract":"Electrocatalytic nitrogen reduction is a vital strategy for green ammonia production. However, this is highly challenged by poor selectivity, and hence, the development of novel catalysts is scanty. The present research provides insight into the development of a new trimetallic alloy, CuAgMo, on multiwalled carbon nanotubes (MWCNT) for the nitrogen reduction reaction (NRR). Based on characterization techniques, the XRD shows successful growth of the trimetallic alloy on the MWCNT surface, and SEM–HRTEM images present the growth of CuAgMo nanoclusters on MWCNT and the existence of an interface. X-ray Absorption Spectroscopy (XAS) analysis confirms the reduction of metals toward cluster formation that could act as an active site for nitrogen reduction. The resulting CuAgMo@CNT nanocluster exhibits high activity and selectivity, achieving a Faradaic efficiency of 38.8% at −1.5 V versus the reversible hydrogen electrode in a 0.5 M KOH electrolyte. Furthermore, chronoamperometry shows that the electrocatalyst demonstrated stability for 90 h, outperforming most recently reported electrocatalysts for NRR. The outcomes of the present research demonstrate a feasible pathway for the rational design of electrocatalysts for N2 fixation.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 16","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70288","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783713","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

Triethanolamine Promotes Formate Selectivity in Aqueous CO2 Reduction by Immobilized Mn(bpy)(CO)3Br 三乙醇胺促进固定化Mn(bpy)(CO)3Br还原水中CO2的甲酸盐选择性

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-08-13 DOI: 10.1002/celc.70285

Maartje C. van Rijn, Lok Nga Poon, Robin N. Dürr, Victor Mougel, Sonja Pullen

{"title":"Triethanolamine Promotes Formate Selectivity in Aqueous CO2 Reduction by Immobilized Mn(bpy)(CO)3Br","authors":"Maartje C. van Rijn, Lok Nga Poon, Robin N. Dürr, Victor Mougel, Sonja Pullen","doi":"10.1002/celc.70285","DOIUrl":"https://doi.org/10.1002/celc.70285","url":null,"abstract":"CO2 capture and electrochemical conversion is a sustainable and circular process to produce carbon-based chemicals. Capture of CO2 can be achieved with amine-based capturing agents, which have been reported in combination with homogeneous catalysts in solution. Amines have a range of effects on CO2 reduction catalysis, depending on how they bind CO2, interact with the electrolyte, and with the catalyst, among other effects. The homogeneous complex Mn(bpy)(CO)3Br is a well-studied catalyst that can selectively produce carbon monoxide (CO) or formate (HCOO–), depending on the conditions. It has been demonstrated that the presence of amines can promote the selective formation of formic acid. In this work, Mn(bpy)(CO)3Br was immobilized on an electrode via supramolecular interactions. The resulting material was studied in electrochemical CO2 reduction under aqueous conditions with and without triethanolamine (TEOA) present as a CO2 capturing agent. We demonstrated that the presence of TEOA causes two effects: (1) a two-fold increased catalytic activity in TON and (2) an increased selectivity for formate, from 36% to 60% Faraday efficiency. It showed that TEOA is an excellent additive for such catalytic systems and demonstrated the potential of expanding such catalytic systems to achieve more active and selective for aqueous CO2 reduction.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 16","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70285","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753606","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

Waste-Derived Onion-Like Carbon Nanoparticles/Recycled Silicon Composite for Sustainable High-Performance Lithium-Ion Batteries 用于可持续高性能锂离子电池的废物衍生洋葱状碳纳米颗粒/再生硅复合材料

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-08-13 DOI: 10.1002/celc.70290

Mohsen Hajian Foroushani, Rasoul Khayyam Nekouei, Samane Maroufi, Zain Ul Abideen, Veena Sahajwalla

{"title":"Waste-Derived Onion-Like Carbon Nanoparticles/Recycled Silicon Composite for Sustainable High-Performance Lithium-Ion Batteries","authors":"Mohsen Hajian Foroushani, Rasoul Khayyam Nekouei, Samane Maroufi, Zain Ul Abideen, Veena Sahajwalla","doi":"10.1002/celc.70290","DOIUrl":"https://doi.org/10.1002/celc.70290","url":null,"abstract":"The sustainable fabrication of electrode materials using waste streams offers a promising pathway toward low-cost and environmentally sustainable lithium-ion batteries (LIBs). In this work, waste-derived silicon (WD-Si) recovered from end-of-life solar panels was used to fabricate a high-performance Si/C composite anode. Waste rubber-derived carbon nanoparticles (MWRC), synthesized through an energy-efficient microwave-assisted process, were incorporated as the carbon component. Mechanical milling was employed to reduce the particle size of WD-Si, resulting in a broad particle-size distribution with a significant submicron fraction after only 60 min of processing. Structural analyses confirmed that the milled Si retained high crystallinity while developing nanosized polycrystalline domains. Microwave-assisted carbonization of waste rubber generated onion-like carbon nanoparticles that were uniformly distributed along the rough surfaces and edges of the Si particles, forming a conductive and mechanically robust framework. The WD-Si/MWRC composite exhibited significantly improved electrochemical performance compared with bare WD-Si and commercial Si electrodes. The composite delivered initial discharge capacities of 2291.4, 1806.7, and 1280.1 mAh g−1 at 0.1, 0.2, and 0.5 C, respectively. After 50 cycles, the composite retained a reversible capacity of 663.8 mAh g−1, whereas commercial Si retained only 242.8 mAh g−1 under the identical conditions.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 16","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70290","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753607","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

Waste Adsorbent Valorization of Biopolymer-Modified Zn–Fe Layered Double Hydroxides for Crystal Violet Removal and Enhanced Nonenzymatic Urea Detection 生物聚合物修饰Zn-Fe层状双氢氧化物对废液吸附剂结晶紫去除和强化非酶尿素检测的影响

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-08-13 DOI: 10.1002/celc.70289

Abdalla Abdelwahab, Khalaf M. Alenezi, Odeh A. O. Alshammari, Jamal R. Humaidi, Ashanul Haque, Hala Mohamed, Fatma Mohamed, Rehab Mahmoud, Hani El Moll

{"title":"Waste Adsorbent Valorization of Biopolymer-Modified Zn–Fe Layered Double Hydroxides for Crystal Violet Removal and Enhanced Nonenzymatic Urea Detection","authors":"Abdalla Abdelwahab, Khalaf M. Alenezi, Odeh A. O. Alshammari, Jamal R. Humaidi, Ashanul Haque, Hala Mohamed, Fatma Mohamed, Rehab Mahmoud, Hani El Moll","doi":"10.1002/celc.70289","DOIUrl":"https://doi.org/10.1002/celc.70289","url":null,"abstract":"Finding suitable and inexpensive bifunctional materials that can act as adsorbents for crystal violet (CV) removal and as electrocatalysts for the electrochemical detection of urea remains one of the contemporary challenges. Waste valorization of spent wastewater nanoadsorbents is a promising route toward achieving circular economy guidelines. In this study, Zn–Fe layered double hydroxides (Zn–Fe LDHs) were synthesized and modified with three natural carbohydrate polymers chitosan, carrageenan, and cellulose using the coprecipitation method. The modified Zn–Fe LDHs were utilized as adsorbents for CV removal. Moreover, the biopolymer-modified Zn–Fe LDHs both before and after CV adsorption were employed as electrocatalysts for the electrochemical detection of urea in an alkaline medium. The results showed that Zn–Fe LDH/chitosan exhibited the highest current density of 118.3 mA·cm−2 for urea detection. Furthermore, after CV adsorption, the catalytic current density of the urea adsorption enhanced to 137.2 mA·cm−2 with a stability of 96%. Additionally, the density functional theory (DFT) calculations revealed that the Zn–Fe LDH/chitosan/CV showed the lowest binding energy (ΔEbind) values in both gas phase (−18.12 kcal·mol−1) and water phase (−15.67 kcal·mol−1), indicating stronger interactions and suggesting that chitosan functionalization significantly enhances the adsorption capacity of LDH.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 16","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70289","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753608","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

New Polymeric Binders for the Preparation and Optimization of Pt/C-Based Electrodes for Proton-Exchange Membrane Fuel Cells (PEMFCs) 新型聚合物粘合剂用于质子交换膜燃料电池（pemfc） Pt/ c基电极的制备及优化

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-08-13 DOI: 10.1002/celc.70287

Christian Dall’Occo, Piercarlo Mustarelli, Alberto Marelli, Daniele Facchi, Carlo Santoro, Lucia Mazzapioda

{"title":"New Polymeric Binders for the Preparation and Optimization of Pt/C-Based Electrodes for Proton-Exchange Membrane Fuel Cells (PEMFCs)","authors":"Christian Dall’Occo, Piercarlo Mustarelli, Alberto Marelli, Daniele Facchi, Carlo Santoro, Lucia Mazzapioda","doi":"10.1002/celc.70287","DOIUrl":"https://doi.org/10.1002/celc.70287","url":null,"abstract":"Polymeric ionomers are essential to the catalyst layer (CL) of proton-exchange membrane fuel cells (PEMFCs). This study compares two ionomers: the short-side-chain (SSC) N+125D and a high-oxygen-permeability experimental ionomer grade (EIG), the latter intended to enhance oxygen mass transport and the oxygen reduction reaction (ORR). The research evaluates ionomer–solvent interactions across various water/1-propanol mixtures to ensure structural integrity and homogeneous distribution of the electrocatalyst. Multiple ink formulations were analyzed using advanced physical–chemical characterization to determine stability and quality. These insights guided the optimization of the electrode's microstructure for integration into membrane electrode assemblies (MEAs). By employing a multidisciplinary approach, the study correlates ink formulation and electrode morphology with electrochemical performance. This integrated methodology provides a robust framework for optimizing next-generation PEMFC electrodes through a deeper understanding of ionomer behavior and structural influence within the CL.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 16","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70287","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148754099","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

Instability of Antimony-Based Energy Storage Materials in Alkaline Environments 碱性环境下锑基储能材料的不稳定性

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-08-09 DOI: 10.1002/celc.70284

Tianxin Liang, Yiming Zhao, Neil Robertson, Caroline Kirk

{"title":"Instability of Antimony-Based Energy Storage Materials in Alkaline Environments","authors":"Tianxin Liang, Yiming Zhao, Neil Robertson, Caroline Kirk","doi":"10.1002/celc.70284","DOIUrl":"https://doi.org/10.1002/celc.70284","url":null,"abstract":"Effective energy storage is crucial for maintaining a reliable supply of renewable energy. Supercapacitors serve as buffers, storing surplus energy during low demand and releasing it during peak times. Antimony-based materials are promising candidates for supercapacitors due to their high-power density and long cycle life. This study demonstrates that, although antimony-based materials have previously been investigated in alkaline electrolytes, antimony sulfide iodide (SbSI), antimony sulfide (Sb2S3), and antimony oxide (Sb2O3) exhibit extremely poor stability in alkaline electrolytes such as NaOH and KOH. They react with these solutions to form compounds such as potassium antimony sulfide oxide (K3SbS3·(Sb2O3)3, PASO), which compromise supercapacitor performance. Although initially stable, PASO degrades quickly upon cycling, affecting long-term storage applications. The study further investigates the stability of SbSI in different electrolytes through cyclic voltammetry, such as in neutral 0.5 M Li2SO4 and acidic 0.5 M H2SO4 electrolytes. SbSI shows improved structural stability in the acidic environment, while in the neutral electrolyte, its electrochemical response is less effective due to polarization and poor charge storage. These findings highlight the importance of electrolyte compatibility and post-cycling characterization when evaluating antimony-based materials for electrochemical energy storage.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 16","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70284","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753249","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