Hierarchical Ni/N/C Single‐Site Catalyst Achieving Industrial‐Level Current Density and Ultra‐Wide Potential Plateau of High CO Faradic Efficiency for CO2 Electroreduction

Author:

Chen Yiqun1,Zhang Junru1,Tian Jingyi1,Guo Yue1,Xu Fengfei1,Zhang Yan1,Wang Xizhang1,Yang Lijun1,Wu Qiang1,Hu Zheng1ORCID

Affiliation:

1. Key Laboratory of Mesoscopic Chemistry of MOE and Jiangsu Provincial Lab for Nanotechnology School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China

Abstract

AbstractThe practical applications of CO2 electroreduction to CO driven by renewable electricity should simultaneously meet the requests of industrial‐level CO partial current density (JCO) at least 100 mA cm−2, wide potential window of high CO faradic efficiency (FECO), and low cost. Herein, a new strategy is reported to construct porous hierarchical Ni/N/C single‐site catalyst with excellent catalytic activity via coating Ni‐containing ZIF‐8 on mesostructured basic magnesium carbonate template followed by pyrolysis. The abundant micropores facilitate the formation of numerous edge‐hosted Ni‐N4 sites with high intrinsic activity, and the interconnected macro/mesopores much promote CO2 delivery and CO release for the full expression of intrinsic activity. Consequently, the catalyst exhibits the industrial‐level JCO of 105–462 mA cm−2 at the potential range of −0.6∼−1.3 V with ultra‐wide high FECO plateau (>90%@−0.4∼−1.3 V), showing great promise for practical application. This study provides a general synthetic strategy to explore high‐performance hierarchical M/N/C electrocatalysts.

Funder

National Basic Research Program of China

Natural Science Foundation of Jiangsu Province

National Natural Science Foundation of China

Publisher

Wiley

Subject

Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials

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