ChemElectroChem最新文献_第4页

In-Situ AFM Study of Zinc Electrodeposition in a Deep Eutectic Solvent

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-11-28 DOI: 10.1002/celc.202400538

Ting Wang, Xintao Xu, Kaixuan Li, Yuteng Fan, Hao Yan, Feng Zhu, Jianzhang Zhou, Jiawei Yan, Bingwei Mao

{"title":"In-Situ AFM Study of Zinc Electrodeposition in a Deep Eutectic Solvent","authors":"Ting Wang, Xintao Xu, Kaixuan Li, Yuteng Fan, Hao Yan, Feng Zhu, Jianzhang Zhou, Jiawei Yan, Bingwei Mao","doi":"10.1002/celc.202400538","DOIUrl":"https://doi.org/10.1002/celc.202400538","url":null,"abstract":"Zinc-based batteries are promising for applications in large-scale energy storage and other scenarios due to their high voltage, large theoretical capacity, and abundant reserves. Compared to traditional aqueous electrolytes, deep eutectic solvents (DESs) offer advantages such as wide electrochemical window, good stability, and fewer parasitic reactions. They can effectively regulate the growth morphology of zinc deposits and suppress dendrite formation during zinc deposition/stripping processes. However, there is currently a lack of direct observation for underlying mechanisms of zinc deposition/stripping processes in DESs. In this study, combined with electrochemical methods, in-situ atomic force microscopy (in-situ AFM) has been utilized to investigate the deposition behavior of zinc metal from ZnCl2 precursor in a deep eutectic solvent composed of choline chloride and ethylene glycol (ethaline). Cyclic voltammetric measurements indicate that zinc deposition is a kinetically controlled process. And in-situ AFM reveals the hexagonal morphology and layered deposition of zinc on highly oriented pyrolytic graphite (HOPG). Our observations benefit the understanding of the kinetics of zinc deposition/stripping in deep eutectic solvent ethaline at a microscopic level.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"12 2","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202400538","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143120525","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

Strain Engineering of Single-Atom Catalysts for Electrochemical Conversion

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-11-27 DOI: 10.1002/celc.202400535

Youxuan Ni, Yong Lu, Weiwei Xie, Jun Chen

引用次数: 0

Utility of Immobilized Metal Salens as Electrocatalysts: Fuel Cells and Organic Electrosynthesis 固定化金属盐作为电催化剂的用途：燃料电池和有机电合成

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-11-26 DOI: 10.1002/celc.202400445

Zachary A. Nguyen, Shelley D. Minteer

引用次数: 0

CORRIGENDUM: Correction to “Industrially Relevant Conditions in Lab-Scale Analysis for Alkaline Water Electrolysis”

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-11-25 DOI: 10.1002/celc.202400553

引用次数: 0

Enhanced Electrochemical Performance of Vanadium Redox Flow Batteries Using Li4Ti5O12/TiO2 Nanocomposite-Modified Graphite Felt Electrodes

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-11-21 DOI: 10.1002/celc.202400477

Zih-Jhong Huang, Daniel Manaye Kabtamu, Aknachew Mebreku Demeku, Guan-Cheng Chen, Ning-Yih Hsu, Hung-Hsien Ku, Yao-Ming Wang, Tai-Chin Chiang, Chen-Hao Wang

{"title":"Enhanced Electrochemical Performance of Vanadium Redox Flow Batteries Using Li4Ti5O12/TiO2 Nanocomposite-Modified Graphite Felt Electrodes","authors":"Zih-Jhong Huang, Daniel Manaye Kabtamu, Aknachew Mebreku Demeku, Guan-Cheng Chen, Ning-Yih Hsu, Hung-Hsien Ku, Yao-Ming Wang, Tai-Chin Chiang, Chen-Hao Wang","doi":"10.1002/celc.202400477","DOIUrl":"https://doi.org/10.1002/celc.202400477","url":null,"abstract":"In this study, Li4Ti5O12 (LTO) and TiO2 nanocomposites uniformly were synthesized on the heat-treated graphite felt through (HGF) hydrothermal and heat treatment methods, denoted by LTO/TiO2@HGF, which LTO/TiO2@HGF acts as effective electrocatalysts to enhance the electrochemical activity in vanadium redox flow battery (VRFB) systems. The cyclic voltammetry (CV) curves of the LTO/TiO2@HGF show higher peak current densities and smaller peak separation than TiO2@HGF, HGF, and pristine graphite felt (PGF) for catalyzing V2+/V3+ and VO₂+/VO2+, indicating superior electrochemical activity of LTO/TiO2@HGF. The VRFB using LTO/TiO2@HGF as the positive and negative electrodes demonstrates an energy efficiency of 82.89 % at 80 mA cm−2. When the VRFB using LTO/TiO2@HGF is applied by a high current density of 200 mA cm−2, it still shows an energy efficiency of 62.22 %. However, the VRFB using PGF cannot perform any performance, and the VRFB using HGF only performs 51.94 %. This improvement can be attributed to the uniform distribution of LTO/TiO2 nanowires on the surface of the graphite felt and the presence of oxygen vacancies on LTO/TiO2, which increased the number of active sites for vanadium ion absorption.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"12 2","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202400477","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117546","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

Machine Learning Exploration of Experimental Conditions for Optimized Electrochemical CO2 Reduction

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-11-21 DOI: 10.1002/celc.202400518

Vuri Ayu Setyowati, Shiho Mukaida, Kaito Nagita, Takashi Harada, Shuji Nakanishi, Kazuyuki Iwase

{"title":"Machine Learning Exploration of Experimental Conditions for Optimized Electrochemical CO2 Reduction","authors":"Vuri Ayu Setyowati, Shiho Mukaida, Kaito Nagita, Takashi Harada, Shuji Nakanishi, Kazuyuki Iwase","doi":"10.1002/celc.202400518","DOIUrl":"https://doi.org/10.1002/celc.202400518","url":null,"abstract":"Electrochemical CO2 reduction has attracted significant attention as a potential method to close the carbon cycle. In this study, we investigated the impact of the electrode fabrication and electrolysis conditions on the product selectivity of Ag electrocatalysts using a machine learning (ML) approach. Specifically, we explored the experimental conditions for obtaining the desired H2/CO mixture ratio with high CO efficiency. Notably, unlike previous ML-based studies, we used experimental results as training data. This ML-based approach allowed us to quantitatively assess the effect of experimental parameters on these targets with a reduced number of experimental trials (only 56 experiments). An inverse analysis based on the ML model suggested the optimal experimental conditions for achieving the desired characteristics of the electrolysis system, with the proposed conditions experimentally validated. This study constitutes the first demonstration of optimal experimental conditions for electrochemical CO2 reduction with desired characteristics using the experimental results as training data.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"11 24","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202400518","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117585","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

Proton-conducting γ-sulfopropyl Acrylate Tethered Halato-Telechelic PVDF Membranes for Vanadium Redox Flow Batteries

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-11-21 DOI: 10.1002/celc.202400539

Jeet Sharma, Bruno Améduri, Vaibhav Kulshrestha

{"title":"Proton-conducting γ-sulfopropyl Acrylate Tethered Halato-Telechelic PVDF Membranes for Vanadium Redox Flow Batteries","authors":"Jeet Sharma, Bruno Améduri, Vaibhav Kulshrestha","doi":"10.1002/celc.202400539","DOIUrl":"https://doi.org/10.1002/celc.202400539","url":null,"abstract":"Advanced fluorinated proton-conducting membrane are dominating functional macromolecules due to their high performance in electrochemical energy devices. However, the co-ion leakage and low power densities still proposes a challenge. Herein, a novel functionally tailored polyvinylidene fluoride-co-(γ)-sulfopropyl acrylate (PVDF-g-SA) based proton-conducting membrane is prepared for vanadium redox flow batteries (VRFBs). The approach introduces a facile guideline to design halato-telechelic −SO3H architectures by tethering γ-sulfopropyl acrylate onto dehydrofluorinated PVDF. The optimized PVDF-g-SA-15 exhibits proton conductivity (κmH+) of 17 mS cm−1 (akin Nafion: ~19 mS cm−1) and retained 87 % and >95 % of its properties in Fenton's reagent and 3 M H2SO4, respectively. In VRFB device, the PVDF-g-SA-15 shows ∼98 % capacity utilization outperforming Nafion-117 (∼85 %). Moreover, bearing dense ionic orientation (viz AFM phases), the potential drop rate is ~2× lower for PVDF-g-SA-15 (1.4×10−3 V min−1) than that of Nafion-117 (2.6×10−3 V min−1). Operational endurance is evaluated fit for 150 mA cm−2 showing maximum coulombic, energy and voltage efficiencies of >98 %, ∼78 %, ∼80 %, respectively. Further investigation for ~200 cycles infer excellent durability with ∼95 % property retention. Additionally, the PVDF-g-SA-15 can deliver ~20 % higher power density than Nafion-117 does. Thus, the revealed alternate membrane holds promising utility in VRFB applications.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"11 24","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202400539","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117584","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

AgxCu100−x Decorated Si Micropillars as Photocathodes for the Reduction of CO2

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-11-21 DOI: 10.1002/celc.202400405

Harsh Chaliyawala, Stephane Bastide, Christine Cachet-Vivier, Nikola Ilic, Tarik Bourouina, Frédéric Marty, Kadiatou Bah, Encarnacion Torralba

{"title":"AgxCu100−x Decorated Si Micropillars as Photocathodes for the Reduction of CO2","authors":"Harsh Chaliyawala, Stephane Bastide, Christine Cachet-Vivier, Nikola Ilic, Tarik Bourouina, Frédéric Marty, Kadiatou Bah, Encarnacion Torralba","doi":"10.1002/celc.202400405","DOIUrl":"https://doi.org/10.1002/celc.202400405","url":null,"abstract":"This work reports the fabrication of p-type Si micropillar (MP) substrates decorated with AgxCu100−x bimetallic nanoparticles and their application as photocathodes for CO2 photoelectrochemical reduction. Metal deposition by metal-assisted chemical etching is chosen as the nanoparticle synthesis method, to explore for the first time its capabilities for 3D structures. It is found to be applicable, allowing a good control of the composition, with nanoparticles distributed along the entire MP, but with a coverage gradient from top to bottom. The AgxCu100−x decorated Si MPs photocathodes show enhanced light trapping compared to flat Si, with 45 % lower reflectance values in the visible and significantly higher catalytic activity, in terms of photocurrent density, overpotential and power savings (4.7 % for Ag50Cu50/Si MPs vs. 3 % for Ag50Cu50/flat-Si). Si MPs coated with Ag50Cu50 and Ag20Cu80 provide the highest gain in potential (440 and 600 mV vs. bare Si MPs) and an increased selectivity towards high energy density products (i. e., CH4) compared to monometallic photocathodes. These are promising features for efficient light-driven CO2 conversion. However, a significant metal loss is observed during photoelectrolysis, especially for Cu-rich compositions. Suggestions to improve the photocathode performance in terms of metal coating homogeneity and catalyst stability are presented.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"12 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202400405","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117547","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

Improved Oxygen Reduction Reaction Activity of Graphene via Mechanochemical Activation and Halogen-Doping

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-11-19 DOI: 10.1002/celc.202400494

Desiree Mae S. Prado, Guangfu Li, Julie Anne D. del Rosario, Joey D. Ocon, Po-Ya Abel Chuang

{"title":"Improved Oxygen Reduction Reaction Activity of Graphene via Mechanochemical Activation and Halogen-Doping","authors":"Desiree Mae S. Prado, Guangfu Li, Julie Anne D. del Rosario, Joey D. Ocon, Po-Ya Abel Chuang","doi":"10.1002/celc.202400494","DOIUrl":"https://doi.org/10.1002/celc.202400494","url":null,"abstract":"There has been an increased effort to replace the expensive and rare platinum and platinum group metals to speed up the sluggish oxygen reduction reaction (ORR) kinetics, which limits the efficiency of fuel cells. One class of promising Pt-alternative catalysts for ORR is metal-free halogen-doped carbon materials. Herein, bromine-doped and iodine-doped graphene were synthesized via mechanochemical activation. The synthesized samples exhibited sub-rounded particles. Mechanical activation via ball milling increased the specific surface area of graphene by reducing particle size. Ball milling also enhanced dopant dispersibility and increased surface roughness, though it reduced surface area compared to ball-milled graphene, likely due to the size difference between carbon and halogen atoms. Among the synthesized catalysts, iodine-doped graphene exhibits the highest limiting current density of 1.806 mA cm−2 with the highest ORR onset potential of 0.74 V vs reversible hydrogen electrode (RHE). The iodine-doped graphene also showed good stability after 1000 cycles of accelerated degradation test. The enhanced ORR performance of iodine-doped graphene was reached using the optimized iodine-to-graphene mass ratio of 4 : 1 after 48 h ball milling time.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"12 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202400494","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143116649","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

Fabrication of Free-Standing Hybrid Composite High Capacity Cathodes for Li−S Batteries with Nickel Oxide Polysulfide Adsorbent

IF 3.5 4区化学

ChemElectroChem Pub Date : 2024-11-19 DOI: 10.1002/celc.202400589

Cem Adalı, Hilal Günsel

{"title":"Fabrication of Free-Standing Hybrid Composite High Capacity Cathodes for Li−S Batteries with Nickel Oxide Polysulfide Adsorbent","authors":"Cem Adalı, Hilal Günsel","doi":"10.1002/celc.202400589","DOIUrl":"https://doi.org/10.1002/celc.202400589","url":null,"abstract":"This study focuses on enhancing lithium-sulfur (Li−S) battery performance by using nickel(II) oxide (NiO), as polysulfide adsorbent to mitigate the shuttle effect. Polysulfides have been shown to effectively adsorb onto the hydrophilic surfaces of polar metal oxides and thus suppress this effect. In this work, a NiO – reduced Graphene Oxide/Sulfur (NiO-rGO/S) hybrid composite paper was developed for use as a binder-free, flexible cathode. The characterization of the composite films was done through Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, thermogravimetric analysis (TG), field emission gun scanning electron microscopy (FEG-SEM), energy dispersive x-ray spectroscopy (EDS) and x-ray diffraction (XRD). To test adsorption of polysulfides by NiO, ultraviolet-visible (UV-Vis) spectroscopy was applied. Electrochemical performance tests of CR2032 cells were also conducted by cyclic voltammetry (CV), charge-discharge tests, electrochemical impedance spectroscopy (EIS). The NiO-rGO/S cathode, particularly the one containing 2 % NiO, exhibited remarkable performance. It delivered an initial discharge capacity of 1230 mAh g−1, maintaining 1029 mAh g−1 after 300 cycles, with a high capacity retention of 83.1 %. This suggests that the NiO-rGO/S hybrid composite is a promising candidate for improving the efficiency and lifespan of Li−S batteries.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"12 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202400589","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143116650","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