Crystalline Phase Engineering to Modulate the Interfacial Interaction of the Ruthenium/Molybdenum Carbide for Acidic Hydrogen Evolution
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作者
Li, Yuze; Dou, Zhenlan; Pan, Yongyu; Zhao, Hao; Yao, Longping; Wang, Qiansen; Zhang, Chunyan; Yue, Zhouying; Zou, Zhiqing; Cheng, Qingqing; Yang, Hui
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刊物名称
NANO LETTERS
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年、卷、文献号
2024, 24, 1530-6992
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关键词
Li, Yuze; Dou, Zhenlan; Pan, Yongyu; Zhao, Hao; Yao, Longping; Wang, Qiansen; Zhang, Chunyan; Yue, Zhouying; Zou, Zhiqing; Cheng, Qingqing; Yang, Hui
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摘要
Ruthenium (Ru) is an ideal substitute to commercial Pt/C for the acidic hydrogen evolution reaction (HER), but it still suffers from undesirable activity due to the strong adsorption free energy of H* (Delta G( H*)). Herein, we propose crystalline phase engineering by loading Ru clusters on precisely prepared cubic and hexagonal molybdenum carbide (alpha-MoC/beta-Mo2C) supports to modulate the interfacial interactions and achieve high HER activity. Advanced spectroscopies demonstrate that Ru on beta-Mo2C shows a lower valence state and withdraws more electrons from the support than that of Ru on alpha-MoC, indicative of a strong interfacial interaction. Density functional theory reveals that the Delta G( H*) of Ru/beta-Mo2C approaches 0 eV, illuminating an enhancement mechanism at the Ru/beta-Mo2C interface. The resultant Ru/beta-Mo2C exhibits an encouraging performance in a proton exchange membrane water electrolyzer with a low cell voltage (1.58 V@ 1.0 A cm(-2)) and long stability (500 h@ 1.0 A cm(-2)).
