Electrochemical reduction of CO2 and CO using interface-engineered Au/Ti electrodes for long-chain hydrocarbon production

被引：20

作者：

Kim, Young Jun ^{[1
]}

Maeng, Ju Young ^{[1
]}

Hwang, Seon Young ^{[1
]}

Rhee, Choong Kyun ^{[1
]}

Sohn, Youngku ^{[1
]}

机构：

[1] Chungnam Natl Univ, Dept Chem, Daejeon 34134, South Korea

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2023年 / 338卷

基金：

新加坡国家研究基金会;

关键词：

Au/Ti interface; Electrochemical CO (2) reduction; Electrochemical CO reduction; Fischer-Tropsch synthesis; Long chain hydrocarbons; FISCHER-TROPSCH SYNTHESIS; PHOTOCATALYTIC ACTIVITY; CARBON-MONOXIDE; ELECTROREDUCTION; TIO2; ELECTROCATALYSTS; CH4;

D O I：

10.1016/j.apcatb.2023.123017

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：

This study demonstrates the electrochemical reduction of CO2 and CO using interface-engineered Au/Ti electrodes. Direct adsorption of CO and indirect processes in CO2 conditions were proposed to form surface CO. Surface H was formed from H+/H2O. Mimicking Fischer-Tropsch synthesis between surface CO and H resulted in the production of CH4 and hydrocarbons (CnH2n and CnH(2n+2), n = 2-7). Faradaic efficiency of CO increased with increasing Au coverage and reached 38%. In CO2-saturated KHCO3, long-chain hydrocarbon production was observed on Au/Ti electrodes with low Au coverage. In CO2 and CO-saturated phosphate electrolytes, higher Au coverage resulted in higher production of long-chain hydrocarbons. The ratio of alkanes to alkenes increased with increasing Au coverage but decreased with applied potential. The study provides insights into interface engineering, electrochemical long-chain hydrocarbon production, and C-C coupling mechanisms.

引用

页数：16

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