The built-in electric field across FeN/Fe 3 N interface for efficient electrochemical reduction of CO 2 to CO

Nanostructured metal-nitrides have attracted tremendous interest as a new generation of catalysts for electroreduction of CO , but these structures have limited activity and stability in the reduction condition. Herein, we report a method of fabricating FeN/Fe N nanoparticles with FeN/Fe N interface...

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Published in:Nature communications 2023-03, Vol.14 (1), p.1724
Main Authors: Yin, Jie, Jin, Jing, Yin, Zhouyang, Zhu, Liu, Du, Xin, Peng, Yong, Xi, Pinxian, Yan, Chun-Hua, Sun, Shouheng
Format: Article
Language:English
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Summary:Nanostructured metal-nitrides have attracted tremendous interest as a new generation of catalysts for electroreduction of CO , but these structures have limited activity and stability in the reduction condition. Herein, we report a method of fabricating FeN/Fe N nanoparticles with FeN/Fe N interface exposed on the NP surface for efficient electrochemical CO reduction reaction (CO RR). The FeN/Fe N interface is populated with Fe-N and Fe-N coordination sites respectively that show the desired catalysis synergy to enhance the reduction of CO to CO. The CO Faraday efficiency reaches 98% at -0.4 V vs. reversible hydrogen electrode, and the FE stays stable from -0.4 to -0.9 V during the 100 h electrolysis time period. This FeN/Fe N synergy arises from electron transfer from Fe N to FeN and the preferred CO adsorption and reduction to *COOH on FeN. Our study demonstrates a reliable interface control strategy to improve catalytic efficiency of the Fe-N structure for CO RR.
ISSN:2041-1723