Anchoring ultra-small molybdenum oxide species on covalent triazine frameworks for efficient electrochemical nitrogen fixation

Wenwen Lin; Teng Guo; Zihao Zhang; Hao Chen; Gaobo Lin; Yifeng Liu; Siyu Yao; Liang Wang; Bolong Li; Jianghao Wang; Jie Fu; Pingkai Ouyang

doi:10.1039/D2CC06983K

Anchoring ultra-small molybdenum oxide species on covalent triazine frameworks for efficient electrochemical nitrogen fixation†

Wenwen Lin,^ab Teng Guo,^ab Zihao Zhang,

^a Hao Chen,^c Gaobo Lin,^ab Yifeng Liu,^d Siyu Yao,^a Liang Wang,

^a Bolong Li,^ab Jianghao Wang,^ab Jie Fu

*^ab and Pingkai Ouyang ‡^a

Author affiliations

* Corresponding authors

^a Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
E-mail: jiefu@zju.edu.cn

^b Institute of Zhejiang University-Quzhou, 99 Zheda Road, Quzhou, Zhejiang Province, China

^c College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China

^d Key Lab of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310028, China

Abstract

We report a smart ion-exchange strategy to anchor molybdenum oxide particles on charge-modulated conjugated triazine frameworks (Mo/CTF-I) for electrochemically fixing nitrogen. The strong interaction between MoO_x and CTF-I is conducive to the activation of the inert N₂ molecule in the electro-chemical process. As a result, 5% Mo/CTF-I exhibited an excellent faradaic efficiency of 27.3% and an NH₃ yield rate of 7.23 μg h⁻¹ mg_cat.⁻¹ at −0.405 V vs. RHE in 0.1 M KOH, surpassing most previous reports.

This article is part of the themed collection: Nanoscale Horizons, Nanoscale, and ChemComm: Nanocatalysis

Chemical Communications

Anchoring ultra-small molybdenum oxide species on covalent triazine frameworks for efficient electrochemical nitrogen fixation†

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Anchoring ultra-small molybdenum oxide species on covalent triazine frameworks for efficient electrochemical nitrogen fixation

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