ZIF/Co-C3N4 with enhanced electrocatalytic reduction of carbon dioxide activity by the photoactivation process. Issue 33 (9th August 2021)

• Record Type: Journal Article
• Authors: Qi, Huihui; Zhou, Yunjie; Li, Yi; Liao, Fan; Wang, Zhenzhen; Wang, Xiao; Huang, Hui; Shao, Mingwang; Liu, Yang; Kang, Zhenhui
• Is Part Of: Nanoscale. Volume 13:Issue 33(2021)
• Page Start: 14089
• Page End: 14095
• Publication Date: 2021-08-09
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/d1nr03119h
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : The photoactivation process promotes the electrocatalytic carbon dioxide reaction on the interface of ZIF/Co-C3 N4 . Abstract : Introducing the effect of light into an electrocatalytic system is an effective method to improve electrocatalytic carbon dioxide reduction (CO2 RR). Here, the composite catalyst (ZIF/Co-C3 N4 ) was prepared for the electrocatalytic reduction of carbon dioxide. The Faraday efficiency of the catalytic reduction of CO2 to CO under light could reach 90.34% at −0.67 V vs. the RHE (reversible hydrogen electrode), which was 30% higher than that obtained under darkness, and the overpotential was reduced by 200 mV. Chemical kinetics experiments and in-situ transient photovoltage (TPV) tests show that the reason for highly efficient CO2 RR is intermediate CO2 − formed by activated CO2 in the electrocatalytic system under light. This work offers a deep insight into the photo-activated electrocatalytic reduction of carbon dioxide, and also opens a new way to devise efficient catalysts for CO2 RR.