@article{Wang2024, 
author = {Liwen Wang and Pengfei Liu and Jie Yang and Chenjia Liang and Changshun Deng and Yinxuan Zhao and Xuefeng Guo and Luming Peng and Nianhua Xue and Qiang Wang and Weiping Ding},
title = {CO2 electroreduction to acetate by enhanced tandem effects of surface intermediate over Co3O4 supported polyaniline catalyst},
year = {2024},
journal = {Carbon Future},
volume = {1},
number = {2},
pages = {9200013},
keywords = {oxygen vacancy, CO2 electroreduction, acetate, Co3O4/PANI/C, tandem effects},
url = {https://www.sciopen.com/article/10.26599/CF.2024.9200013},
doi = {10.26599/CF.2024.9200013},
abstract = {The electroreduction of CO2 to produce acetate is an extremely important and widely studied reaction. Herein, we report a heterogeneous electrocatalyst with Co3O4 nanoparticles immobilized on polyaniline (PANI) and cosupported by highly graphitized carbon (Co3O4/PANI/C) for the electroreduction of CO2 to acetate with high activity and selectivity. Remarkably enhanced acetate Faraday efficiency (ca. 62%) and current density (ca. 35 mA∙cm−2) were obtained under conditions of static electroreduction at −0.95 V in 0.5 M KOH aqueous electrolyte while suppressing the competitive hydrogen evolution reaction. The excellent performance of Co3O4/PANI/C is attributed to the tandem effect of the Co3O4 nanoparticles with abundant oxygen vacancies and the PANI heterogeneous interface in a favorable configuration. Density functional theory calculations revealed that the tandem configuration of Co3O4/PANI/C facilitates the rapid delivery of the key *CO intermediate formed on Co3O4 to PANI, which increases the coverage of the intermediate *CO on the electrocatalyst surface, thus promoting acetate production during the CO2 electroreduction reaction.}
}