Cation Effect on Interfacial CO2 Concentration in the Electrochemical CO2 Reduction Reaction

被引：90
|
作者：
Malkani, Arnav S. [1 ]
Anibal, Jacob [1 ]
Xu, Bingjun [1 ]
机构：
[1] Univ Delaware, Ctr Catalyt Sci & Technol, Dept Chem & Biomol Engn, Newark, DE 19716 USA
来源：
ACS CATALYSIS | 2020年 / 10卷 / 24期
基金：
美国国家科学基金会;
关键词：
ATR-SEIRAS; cations; CO2 reduction reaction (CO2RR); electrochemistry; interfacial properties; CARBON-DIOXIDE; COPPER; SELECTIVITY; ELECTRODES; MONOXIDE;
D O I：
10.1021/acscatal.0c03553
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The capacity of larger alkali metal cations to maintain the interfacial CO2 concentration by buffering the interfacial pH has been proposed to enhance the electrochemical CO2 reduction reaction (CO2RR). In-situ spectroscopy is employed to determine the trend of interfacial CO2 concentration with different alkali metal cations. Contradictory to the cation buffering hypothesis, the interfacial CO2 concentration decreases with increasing size of alkali metal cations at CO2RR conditions on Au. The interfacial CO2 concentration is largely dependent on the rate of CO2 depletion by reduction or reaction with OH- generated at the electrode, and not on the proposed buffering effect.
引用
收藏
页码：14871 / 14876
页数：6
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