Dynamic Co(µ-O)2Ru Moiety Endowed Efficiently Catalytic Hydrogen Evolution

Ching Wei Tung, Tsung Rong Kuo, Yu Ping Huang, You Chiuan Chu, Cheng Hung Hou, Yanan Li, Nian Tzu Suen, Jie Han, Hao Ming Chen

研究成果: 雜誌貢獻文章同行評審

1 引文 斯高帕斯(Scopus)

摘要

A large number of highly active Ru-based electrocatalysts have been reported for the hydrogen evolution reaction (HER). The utilization of synergistic effects for promoting HER performance remains inadequate, especially for corresponding potential-driven reactive sites at the atomic level. Herein, a Co-substituted Ru-Ru2P structure is employed as a model system to reveal the synergistic effect on Ru-based electrocatalysts and to realize the potential-driven reactive sites during the HER. Optimized Ru-Ru2P @ Co0.6 exhibits a superior catalytic performance in alkaline electrolytes, achieving a low overpotential of 9 mV at a current density of 10 mA cm–2. To precisely describe the geometrical nature of surface moiety of Co(µ-O)2Ru, an indicator (β) is established to quantify the strain of Co(µ-O)2Ru moieties through calculating the L-Co-L (L = P or O) angles through employing in situ X-ray absorption spectroscopy. Both bond strain and corresponding metal-metal distance of Co-Ru in Co(µ-O)2Ru moiety can significantly affect the structural tolerance and facilitate the coupling of adsorbed hydrogen atoms during HER. It is believed that the perspective raised in the present work will provide a new avenue to the design of highly active HER catalysts at the atomic scale.
原文英語
文章編號2200079
期刊Advanced Energy Materials
12
發行號28
DOIs
出版狀態已發佈 - 7月 27 2022

ASJC Scopus subject areas

  • 可再生能源、永續發展與環境
  • 材料科學(全部)

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