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Metal-Organic Frameworks for Electrocatalytic Nitrate Reduction: Strategies, Mechanisms, and Perspectives
Yuran Wang1, Shengji Tian1, Chunshuang Yan1
1MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, State Key Laboratory of Space Power-Sources, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, China.
None:
Electrocatalytic nitrate reduction reaction (NO3RR) has been emerging as a sustainable route for ammonia synthesis under ambient conditions. Metal-organic frameworks (MOFs), possessing well-defined crystal structures and tunable coordination environments, are regarded as an ideal platform for electrocatalytic NO3RR. In this review, we systematically highlight the recent breakthroughs in MOF-based electrocatalysts for NO3RR, from the perspectives of structural design strategies, reaction mechanisms, and future outlooks. Ligand engineering, metal node engineering, and heterostructure engineering strategies are discussed here. After that, the structure-activity relationships and the prevailing reaction mechanisms of NO3RR on MOFs, including the direct eight-electron transfer pathway and tandem mechanism, are analyzed. Moreover, we outline the current challenges and future prospects concerning the application of MOFs in NO3RR, with the aim of paving the way for the rational design of next-generation MOF-based electrocatalysts.
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