Issue 28, 2024

Regulating the selectivity through ionomer–catalyst interactions for high-efficiency electrocatalytic CO2 reduction

Abstract

Establishing a suitable electrode microenvironment is important to achieving high-efficiency electrocatalytic CO2 reduction at industrially relevant current densities. Introducing ionomers provided an effective method for regulating the electrode microenvironment, but the mechanism of interactions between the ionomer and the catalyst remains elusive. In this work, the influence of three types of ionomers on the performance and microenvironment of Ag nanoparticle (NP) and molecularly dispersed cobalt phthalocyanine (CoPc MDE) catalysts were systematically investigated. It was found that the non-covalent interactions between the ionomers with aromatic groups and CoPc MDE resulted in the hydrophilicity of electrode and undesirably promoted the generation of hydrogen during the reaction. The optimal ionomer–catalyst combinations achieved excellent FE(CO)s > 99% at current densities up to −200 mA cm−2 and stable operation for more than 180 h at a current density of −100 mA cm−2. This work underlines the necessity of selecting appropriate ionomer according to the nature of catalyst.

Graphical abstract: Regulating the selectivity through ionomer–catalyst interactions for high-efficiency electrocatalytic CO2 reduction

Supplementary files

Article information

Article type
Paper
Submitted
26 Apr 2024
Accepted
16 Jun 2024
First published
18 Jun 2024

J. Mater. Chem. A, 2024,12, 17181-17192

Regulating the selectivity through ionomer–catalyst interactions for high-efficiency electrocatalytic CO2 reduction

C. Yu, T. Lei, L. Xu, C. Jin, J. Yi, S. Liu, S. Lin, Y. Yang, H. Song, K. Wang, H. Fan, C. Zheng, X. Zhang and X. Gao, J. Mater. Chem. A, 2024, 12, 17181 DOI: 10.1039/D4TA02905D

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