Amorphous-crystalline porous ruthenium selenide as highly efficient electrocatalysts for alkaline hydrogen evolution

Jingjing Zhao, Yanna Guo, Shuangjun Li, Jiaqi Wang, Kaihong Liu, Lijuan Dai, Ying Dai, Bo Jiang*, Hexing Li


研究成果: Article査読


Transition metal chalcogenides have garnered considerable attention as high-performance electrocatalysts for the hydrogen evolution reaction (HER). Enriching their structural properties through constructing a porous architecture and creating crystalline-amorphous interfaces holds promise for enhancing HER performance. In this study, porous RuSe2 electrocatalysts with varying crystallinities (i.e., amorphous, amorphous-crystal, and crystal) were synthesized using a straightforward hydrothermal method followed by a subsequent annealing process. Comparable experiments indicate that porous RuSe2-400°C, featuring a crystalline-amorphous structure, exhibited enhanced catalytic activity compared to its amorphous and crystalline counterparts. The porous architecture and interfacial sites between crystalline and amorphous phases in RuSe2-400°C not only integrate the critical factors of abundant unsaturated coordination sites and good electrical conductivity but also modify its surface electronic state, which can optimize the adsorption energies of reaction intermediates. As a result, the optimized samples displayed remarkable HER activity in an alkaline medium, showcasing an extremely low overpotential of 27 mV at 10 mA cm-2 and a Tafel slope of 39.8 mV dec-1. This study provides a platform for rationalizing high-perform porous electrocatalysts with rich amorphous/crystalline interfaces.

ジャーナルChemical Engineering Journal
出版ステータスPublished - 2024 4月

ASJC Scopus subject areas

  • 化学一般
  • 環境化学
  • 化学工学一般
  • 産業および生産工学


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