Boosting nitrate electroreduction to ammonia on NbOxvia constructing oxygen vacancies

Xuefei Wan; Weiwei Guo; Xue Dong; Haihong Wu; Xiaofu Sun; Mengen Chu; Shitao Han; Jianxin Zhai; Wei Xia; Shuaiqiang Jia; Mingyuan He; Buxing Han

doi:10.1039/D1GC04483D

Boosting nitrate electroreduction to ammonia on NbO_xvia constructing oxygen vacancies†

Xuefei Wan,^a Weiwei Guo,^b Xue Dong,^a Haihong Wu,

*^a Xiaofu Sun,

*^b Mengen Chu,^a Shitao Han,^a Jianxin Zhai,^a Wei Xia,^a Shuaiqiang Jia,

^a Mingyuan He^a and Buxing Han

*^ab

Author affiliations

* Corresponding authors

^a Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China
E-mail: hhwu@chem.ecnu.edu.cn, hanbx@iccas.ac.cn

^b Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid and Interface and Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
E-mail: sunxiaofu@iccas.ac.cn

Abstract

We have synthesized NbO_x with oxygen vacancies (OVs) and conducted the first work on nitrate electroreduction to NH₃ over Nb oxides. It is a robust non-precious metal catalyst for NH₃ synthesis by nitrate electroreduction. The faradaic efficiency of 94.5% and the NH₃ formation rate of 55.0 μg h⁻¹ mg_cat⁻¹ were achieved in a neutral electrolyte. The excellent performance of NbO_x originates from the intrinsic properties of Nb oxides and the OVs in the catalyst.

This article is part of the themed collection: 2022 Green Chemistry Hot Articles

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Boosting nitrate electroreduction to ammonia on NbO_xvia constructing oxygen vacancies†

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Boosting nitrate electroreduction to ammonia on NbOxvia constructing oxygen vacancies†

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Boosting nitrate electroreduction to ammonia on NbO_xvia constructing oxygen vacancies†

Boosting nitrate electroreduction to ammonia on NbO_xvia constructing oxygen vacancies