Constructing Oxygen Vacancies via Engineering Heterostructured Fe3C/Fe3O4 Catalysts for Electrochemical Ammonia Synthesis

Author:

Yang Xiaoxuan1,Tian Yu1,Mukherjee Shreya2,Li Ke1,Chen Xinyu1,Lv Jiaqi1,Liang Song3,Yan Li‐Kai1,Wu Gang2ORCID,Zang Hong‐Ying1

Affiliation:

1. Key Laboratory of Polyoxometalate Science of the Ministry of Education Faculty of Chemistry Northeast Normal University Changchun 130024 China

2. Department of Chemical and Biological Engineering University at Buffalo The State University of New York Buffalo NY 14260 USA

3. Key Laboratory of Bionic Engineering Ministry of Education Jilin University Changchun 130024 China

Abstract

AbstractElectrocatalytic nitrogen reduction reaction (NRR) under ambient conditions provides an intriguing pathway to convert N2 into NH3. However, significant kinetic barriers of the NRR at low temperatures in desirable aqueous electrolytes remain a grand challenge due to the inert N≡N bond of the N2 molecule. Herein, we propose a unique strategy for in situ oxygen vacancy construction to address the significant trade‐off between N2 adsorption and NH3 desorption by building a hollow shell structured Fe3C/Fe3O4 heterojunction coated with carbon frameworks (Fe3C/Fe3O4@C). In the heterostructure, the Fe3C triggers the oxygen vacancies of the Fe3O4 component, which are likely active sites for the NRR. The design could optimize the adsorption strength of the N2 and NxHy intermediates, thus boosting the catalytic activity for the NRR. This work highlights the significance of the interaction between defect and interface engineering for regulating electrocatalytic properties of heterostructured catalysts for the challenging NRR. It could motivate an in‐depth exploration to advance N2 reduction to ammonia.

Funder

National Natural Science Foundation of China

Natural Science Foundation of Jilin Province

Fundamental Research Funds for the Central Universities

Publisher

Wiley

Subject

General Chemistry,Catalysis

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