Bimetallic Mo–Co nanoparticles anchored on nitrogen-doped carbon for enhanced electrochemical nitrogen fixation

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

2 Scopus Citations
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Author(s)

  • Jue Hu
  • Chengxu Zhang
  • Mengyuan Xu
  • Yujia Xue
  • Lifen Liu

Detail(s)

Original languageEnglish
Pages (from-to)9091-9098
Journal / PublicationJournal of Materials Chemistry A
Volume8
Issue number18
Online published16 Apr 2020
Publication statusPublished - 14 May 2020

Abstract

Electrocatalytic nitrogen fixation at room temperature and ambient pressure is considered to be one of the most energy-efficient and environmentally-friendly approaches to ammonia (NH3) production. The construction of efficient catalysts for the electrocatalytic nitrogen reduction reaction (NRR) remains a significant challenge. However, there have been no reports dedicated to non-noble bimetals on nitrogen-doped carbons as efficient NRR electrocatalysts, considered from either side of the theoretical volcano plot for the NRR. Herein, Mo-Co bimetallic nanoparticles anchored on nitrogen-doped porous carbon (Mo-Co/NC) are developed for the first time and serve as a cost-effective catalyst candidate for the NRR. In comparison to single-metallic Co/NC, a bimetallic Mo-Co/NC catalyst exhibits the enhanced activity and selectivity of NRR electrocatalysis with an ammonia yield of 89.8 μmol h-1 gcat.-1 and a faradaic efficiency of 13.5%, at a low operating potential of -0.10 V (vs. RHE) in 0.1 M Na2SO4. Moreover, the composite catalyst shows high electrochemical stability and selectivity during 50 000 s of NRR processing. The favorable NRR electrocatalytic activity of Mo-Co/NC could be ascribed to the synergistic effect of strongly adsorbed Mo and weakly adsorbed Co composite. This work provides a facile strategy towards the design of porous non-precious metallic electrocatalysts for efficient NRR under ambient conditions.

Citation Format(s)

Bimetallic Mo–Co nanoparticles anchored on nitrogen-doped carbon for enhanced electrochemical nitrogen fixation. / Zhang, Yizhen; Hu, Jue; Zhang, Chengxu; Liu, Yizhe; Xu, Mengyuan; Xue, Yujia; Liu, Lifen ; Leung, Michael K. H.

In: Journal of Materials Chemistry A, Vol. 8, No. 18, 14.05.2020, p. 9091-9098.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal