查找使用阿拉丁产品的科研文献

Subnanometer high-entropy alloy nanowires enable remarkable hydrogen oxidation catalysis

Zhan Changhong,Xu Yong,Bu Lingzheng,Zhu Huaze,Feng Yonggang,Yang Tang,Zhang Ying,Yang Zhiqing,Huang Bolong,Shao Qi,Huang Xiaoqing

High-entropy alloys (HEAs) with unique physicochemical properties have attracted tremendous attention in many fields, yet the precise control on dimension and morphology at atomic level remains formidable challenges. Herein, we synthesize unique PtRuNiCoFeMo HEA subnanometer nanowires (SNWs) for alkaline hydrogen oxidation reaction (HOR). The mass and specific activities of HEA SNWs/C reach 6.75 A mg Pt+Ru −1 and 8.96 mA cm −2 , respectively, which are 2.8/2.6, 4.1/2.4, and 19.8/18.7 times higher than those of HEA NPs/C, commercial PtRu/C and Pt/C, respectively. It can even display enhanced resistance to CO poisoning during HOR in the presence of 1000 ppm CO. Density functional theory calculations reveal that the strong interactions between different metal sites in HEA SNWs can greatly regulate the binding strength of proton and hydroxyl, and therefore enhances the HOR activity. This work not only provides a viable synthetic route for the fabrication of Pt-based HEA subnano/nano materials, but also promotes the fundamental researches on catalysis and beyond.