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<p>Transition-metal carbides (TMCs) have emerged as promising alternatives to platinum-based catalysts in the electrocatalytic hydrogen evolution reaction (HER), showcasing substantial potential for sustainable energy applications. Herein, a rapid microwave-plasma-assisted synthesis strategy (60 s) is employed to fabricate phosphorus-doped tungsten carbide (WC) uniformly loaded with osmium (Os) nanoclusters (Os/P-WC). The resulting Os/P-WC catalyst exhibits exceptional HER performance, achieving a benchmark current density of 10 mA cm<sup>−2</sup> with low overpotentials of 20, 51, and 11 mV in alkaline, acidic, and alkaline seawater electrolytes, respectively. Furthermore, it maintains stable operation for 100 h at both 10 and 500 mA cm<sup>−2</sup> in alkaline electrolyte. <i>In-situ</i> Raman spectroscopy, <i>in-situ</i> electrochemical impedance spectroscopy (EIS), and hydrogen binding energy (HBE) experiments confirm that the electronic metal-support interaction (EMSI) generates electron-enriched Os active sites. These sites facilitate the adsorption and dissociation of water, optimize the adsorption and desorption of hydrogen intermediates (H*), and thereby significantly accelerate reaction kinetics. This work presents a novel design and synthesis strategy for developing highly active electrocatalysts with low precious metal loading for H<sub>2</sub> evolution applications.</p>

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P-doping optimized electronic metal-support interaction in Os/WC boosts H* transfer for enhanced alkaline hydrogen evolution

  • 期刊论文

  • 发表日期：

    2025年10月10日

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  • Xiangrui Zhuge,
  • Chengfeng Wang,
  • Yuhao Li,
  • Yingxia Zong,
  • Weiping Xiao,
  • Dehong Chen,
  • Jinsong Wang,
  • Tianyi Ma,
  • Min Song,
  • Zexing Wu,
  • Lei Wang

摘要

Transition-metal carbides (TMCs) have emerged as promising alternatives to platinum-based catalysts in the electrocatalytic hydrogen evolution reaction (HER), showcasing substantial potential for sustainable energy applications. Herein, a rapid microwave-plasma-assisted synthesis strategy (60 s) is employed to fabricate phosphorus-doped tungsten carbide (WC) uniformly loaded with osmium (Os) nanoclusters (Os/P-WC). The resulting Os/P-WC catalyst exhibits exceptional HER performance, achieving a benchmark current density of 10 mA cm−2 with low overpotentials of 20, 51, and 11 mV in alkaline, acidic, and alkaline seawater electrolytes, respectively. Furthermore, it maintains stable operation for 100 h at both 10 and 500 mA cm−2 in alkaline electrolyte. In-situ Raman spectroscopy, in-situ electrochemical impedance spectroscopy (EIS), and hydrogen binding energy (HBE) experiments confirm that the electronic metal-support interaction (EMSI) generates electron-enriched Os active sites. These sites facilitate the adsorption and dissociation of water, optimize the adsorption and desorption of hydrogen intermediates (H*), and thereby significantly accelerate reaction kinetics. This work presents a novel design and synthesis strategy for developing highly active electrocatalysts with low precious metal loading for H2 evolution applications.