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文献详情 >Probing Electrocatalytic CO_(2... 收藏

Probing Electrocatalytic CO_(2) Reduction at Individual Cu Nanostructures via Optically Targeted Electrochemical Cell Microscopy

作     者:Joshua D.Walmsley Joshua W.Hill Partha Saha Caleb M.Hill 

作者机构:Department of ChemistryUniversity of WyomingLaramieWY 82071USA 

出 版 物:《Journal of Analysis and Testing》 (分析检测(英文))

年 卷 期:2019年第3卷第2期

页      面:140-149页

核心收录:

学科分类:08[工学] 0805[工学-材料科学与工程(可授工学、理学学位)] 080502[工学-材料学] 

基  金:Financial support of this work was provided by the University of Wyoming,the Wyoming NASA Space Grant Consortium(NASA Grant#NNX15AI08H) the NIH Wyoming INBRE program(2P20GM103432) the Wyoming Research Scholars Program 

主  题:Electrochemistry Electrochemical microscopy Nanoparticles CO_(2)reduction 

摘      要:Optically targeted electrochemical cell microscopy(OTECCM)was applied to measure electrocatalytic rates at individual Cu nanoparticles(NPs)under electrolyte conditions relevant to CO_(2) *** electrocatalytic responses from individual NPs were found to exhibit a wide variation in behavior,with significant NP-to-NP variations in the magnitude of electrocata-lytic currents and necessary overpotentials being *** of these quantities with metrics of NP size suggest no significant variations in the inherent electrocatalytic activity of the NPs with *** element simulations of diffusion in this system demonstrate the observed diffusion-limited currents are significantly smaller than expected,attributable to the presence of a significant amount of residual ligand on the surface of the Cu NPs,which were prepared via an organic phase *** results presented here further demonstrate the promise of techniques which employ correlated optical and electrochemical measurements,such as OTECCM,for studying electrocatalysis at individual NPs.

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