Chinese Journal of Catalysis ›› 2026, Vol. 84: 96-105.DOI: 10.1016/S1872-2067(26)65011-5

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Amorphous-crystalline heterostructured RuMoNiN/Ni-MoO2 for highly efficient and stable alkaline hydrogen evolution reaction

Mingtao Chua,b, Huimin Zhanga,b, Bianqing Rena,b, Jing Caoa,b, Teng Zhanga,b, Ping Songa, Zizhun Wangc, Ce Hana(), Weilin Xua,b()   

  1. a State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China
    b School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, Anhui, China
    c Electron Microscopy Center, Jilin University, Changchun 130012, Jilin, China
  • Received:2025-11-12 Accepted:2026-01-06 Online:2026-05-18 Published:2026-04-16
  • Contact: *E-mail: hance@ciac.ac.cn (C. Han),
    weilinxu@ciac.ac.cn (W. Xu).
  • Supported by:
    Key Research and Development Program sponsored by the Ministry of Science and Technology (MOST)(2022YFB4002000);Key Research and Development Program sponsored by the Ministry of Science and Technology (MOST)(2022YFA1203400);National Natural Science Foundation of China(22372155);National Natural Science Foundation of China(22102172);National Natural Science Foundation of China(22005294);Jilin Provincial Hydrogen Industrial Comprehensive Research Institute Science and Technology Special Project of China(20240302002ZD)

Abstract:

The amorphization and heterostructuralization of noble metal-based materials are effective approaches to enhance the electrocatalytic performance towards the hydrogen evolution reaction (HER) in water splitting. Herein, (NH4)4[NiH6Mo6O24]·5H2O (NiMo6) polyoxometalate was employed for the Ru combination to fabricate a heterostructured catalyst consisting of amorphous RuMoNiN and crystalline Ni-MoO2 (RuMoNiN/Ni-MoO2) via a simple annealing process under Ar/NH3 atmosphere. Comprehensive structural characterizations and theoretical investigations suggest that the formation of such unique amorphous-crystalline heterostructures is governed by the application of NiMo6 precursor and Ar/NH3 atmosphere, which leads to the joint regulation on the electronic structure of Ru sites through -NH2 coordination and heterostructured interaction, and thus facilitating the water dissociation and H intermediates sorption steps in the alkaline HER process. Accordingly, the as-fabricated RuMoNiN/Ni-MoO2 manifests excellent HER performance demanding an overpotential of only 18.3 mV at the current density of 10 mA cm‒2 with a minimal overpotential decay rate of 0.62 mV h‒1 during continuous operation at 1 A cm‒2. This work offers constructive suggestions for the facile construction and structural regulation of amorphous-crystalline heterostructured noble metal-based electrocatalysts for various promising energy applications.

Key words: Noble metal, Amorphous, Heterostructured, Hydrogen evolution reaction, Electrocatalysis