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