Metastable face-centered cubic ruthenium-based binary alloy for efficient alkaline hydrogen oxidation electrocatalysis

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外文摘要：Metastable nanostructured electrocatalyst with a completely different surface environment compared to conventional phase-based electrocatalyst often shows distinctive catalytic property.Although Ru-based electrocatalysts have been widely investigated toward hydrogen oxidation reaction(HOR)under alkaline electrolytes,these studies are mostly limited to conventional hexagonal-close-packed(hcp)phase,mainly arising from the lack of sufficient synthesis strategies.In this study,we report the precise synthe-sis of metastable binary RuW alloy with face-centered-cubic(fcc)phase.We find that the introduction of W can serve as fcc phase seeds and reduce the formation energy of metastable fcc-RuW alloy.Impressively,fcc-RuW exhibits remarkable alkaline HOR performance and stability with the activity of 0.67 mA cm-2Ru,which is almost five and three times higher than that of hcp-Ru and commercial Pt/C,respectively,which is attributed to the optimized binding strength of adsorbed hydroxide intermediate derived from tailored electronic structure through W doping and phase engineering.Moreover,this strat-egy can also be applied to synthesize other metastable fcc-RuCr and fcc-RuMo alloys with enhanced HOR performances.

外文关键词：

Hydrogen oxidation reactionMetastable phaseFace-centered cubic(fcc)RuPhase engineering

作者：

Yunbo Li、Jianchao Yue、Chaoyi Yang、Hongnan Jia、Hengjiang Cong、Wei Luo

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作者单位：

College of Chemistry and Molecular Sciences,Wuhan University,Wuhan 430072,Hubei,China

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Key Research and Development program of China

项目编号：

22272121219721072021YFB4001200

出版年：

2024

DOI：

10.1016/j.jechem.2024.01.032

能源化学

中国科学院大连化学物理研究所中国科学院成都有机化学研究所

能源化学

CSTPCDEI

影响因子：0.654

ISSN：2095-4956

年,卷(期)：2024.92(5)