Mo2C for electrocatalytic nitrate reduction to ammonia

Xiaotian Li; Shiyan Wang; Guohui Wang; Peng Shen; Dongwei Ma; Ke Chu

doi:10.1039/D2DT03189B

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Mo₂C for electrocatalytic nitrate reduction to ammonia†

Xiaotian Li,‡^a Shiyan Wang,‡^b Guohui Wang,^a Peng Shen,^a Dongwei Ma^c and Ke Chu

*^a

Author affiliations

* Corresponding authors

^a School of Materials Science and Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
E-mail: chuk630@mail.lzjtu.cn

^b College of Electronic and Optical Engineering, College of Microelectronics, Institute of Flexible Electronics (Future Technology), Nanjing University of Posts & Telecommunications (NJUPT), Nanjing 210023, China

^c Key Laboratory for Special Functional Materials of Ministry of Education, School of Materials Science and Engineering, Henan University, Kaifeng 475004, China

Abstract

Electrocatalytic nitrate reduction to ammonia (NRA) shows great potential to simultaneously realize sustainable NH₃ production and NO₃⁻ pollutant elimination. Herein, Mo₂C, a typical transition metal carbide, is first demonstrated to be an efficient and durable NRA catalyst. The developed Mo₂C nanoparticles anchored on reduced graphene oxide (Mo₂C/RGO) show a maximum NH₃-faradaic efficiency of 85.2% with a corresponding NH₃ yield of 4.8 mg h⁻¹ cm⁻². Theoretical computations reveal that surface-terminated Mo sites of Mo₂C can selectively absorb NO₃⁻ and effectively boost the NRA process through a NOH hydrogenation pathway.

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Article information

DOI: https://doi.org/10.1039/D2DT03189B
Article type: Communication
Submitted: 02 Oct 2022
Accepted: 08 Nov 2022
First published: 14 Nov 2022

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Dalton Trans., 2022,51, 17547-17552

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Mo₂C for electrocatalytic nitrate reduction to ammonia

X. Li, S. Wang, G. Wang, P. Shen, D. Ma and K. Chu, Dalton Trans., 2022, 51, 17547 DOI: 10.1039/D2DT03189B

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