过电位
电催化剂
化学
循环伏安法
二氧化碳电化学还原
催化作用
电化学
化学工程
产品分销
二氧化碳
电解质
无机化学
纳米技术
电极
材料科学
有机化学
一氧化碳
工程类
物理化学
作者
Ying‐Chih Lai,Ryan J. R. Jones,Yu Wang,Lan Zhou,John M. Gregoire
标识
DOI:10.1021/acscombsci.9b00130
摘要
Electrochemical conversion of carbon dioxide into valuable chemicals or fuels is an increasingly important strategy for achieving carbon neutral technologies. The lack of a sufficiently active and selective electrocatalyst, particularly for synthesizing highly reduced products, motivates accelerated screening to evaluate new catalyst spaces. Traditional techniques, which couple electrocatalyst operation with analytical techniques to measure product distributions, enable screening throughput at 1-10 catalysts per day. In this paper, a combinatorial screening instrument is designed for MS detection of hydrogen, methane, and ethylene in quasi-real-time during catalyst operation experiments in an electrochemical flow cell. Coupled with experiment modeling, product detection during cyclic voltammetry (CV) enables modeling of the voltage-dependent partial current density for each detected product. We demonstrate the technique by using the well-established thin film Cu catalysts and by screening a Pd-Zn composition library in carbonate-buffered aqueous electrolyte. The rapid product distribution characterization over a large range of overpotential makes the instrument uniquely suited for accelerating screening of electrocatalysts for the carbon dioxide reduction reaction.
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