Electrochemical CO2/CO reduction on Ag/Cu electrodes and exploring minor Fischer-Tropsch reaction pathways

被引：17

作者：

Yun, Gaeun ^{[1
]}

Hwang, Seon Young ^{[1
]}

Maeng, Ju Young ^{[1
]}

Kim, Young Jun ^{[1
]}

Rhee, Choong Kyun ^{[1
]}

Sohn, Youngku ^{[1
]}

机构：

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

来源：

APPLIED SURFACE SCIENCE | 2024年 / 649卷

基金：

新加坡国家研究基金会;

关键词：

Ag/Cu; Electrochemical CO 2 reduction; Electrochemical CO reduction; C-C coupling; Fischer-Tropsch chemistry; CARBON-DIOXIDE; CU; CO; ELECTROCATALYSTS; ELECTROREDUCTION; NANOPARTICLES; CONVERSION; CATALYSTS; DESIGN;

D O I：

10.1016/j.apsusc.2023.159179

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：

Ag/Cu hybrids have emerged as highly efficient catalysts for electrochemical (EC) CO2 reduction, yielding impressive C-C coupling products. We investigate Ag/Cu electrodes prepared via sputter deposition to explore their potential in EC CO2 and CO reductions. Our study highlights the significant impact of Ag thickness on resulting gas and liquid products, emphasizing the vital role of the Ag/Cu interface. Under CO2-saturated conditions, CO, CH4, and C2H4 are produced with high Faradaic efficiencies, while CO2-saturated KHCO3 generates formate, ethanol, propanol, isopropanol, acetate, and acetone. Experiments in phosphate conditions reveal new pathways for long-chain hydrocarbons (CnH2n and CnH2n+2, n = 2-7), typical products of Fischer-Tropsch chemistry. We also demonstrate CO hydrogenation to CH4 and C2-7 hydrocarbons, with alkane/alkene ratios influenced by electrolyte nature, concentration, applied potential, and Ag-modified Cu. These insights have implications for energy, environmental applications, and the future of EC CO2 and CO reduction through C-C coupling.

引用

页数：19

共 83 条

[1] Theoretical model Anderson-Schulz-Flory within the framework of studying the mechanism of polycondensation synthesis [J].