Stability Issues in Electrochemical CO2 Reduction: Recent Advances in Fundamental Understanding and Design Strategies

Author:

Lai Wenchuan12,Qiao Yan1,Wang Yanan1,Huang Hongwen1ORCID

Affiliation:

1. College of Materials Science and Engineering Hunan University Changsha Hunan 410082 P. R. China

2. College of Chemistry and Materials Science Nanjing Normal University Nanjing Jiangsu 210023 P. R. China

Abstract

AbstractElectrochemical CO2 reduction reaction (CO2RR) offers a promising approach to close the anthropogenic carbon cycle and store intermittent renewable energy in fuels or chemicals. On the path to commercializing this technology, achieving the long‐term operation stability is a central requirement but still confronts challenges. This motivates to organize the present review to systematically discuss the stability issue of CO2RR. This review starts from the fundamental understanding on the destabilization mechanisms of CO2RR, with focus on the degradation of electrocatalyst and change of reaction microenvironment during continuous electrolysis. Subsequently, recent efforts on catalyst design to stabilize the active sites are summarized, where increasing atomic binding strength to resist surface reconstruction is highlighted. Next, the optimization of electrolysis system to enhance the operation stability by maintaining reaction microenvironment especially mitigating flooding and carbonate problems is demonstrated. The manipulation on operation conditions also enables to prolong CO2RR lifespan through recovering catalytically active sites and mass transport process. This review finally ends up by indicating the challenges and future opportunities.

Funder

National Natural Science Foundation of China

National Key Research and Development Program of China

Publisher

Wiley

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

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