纳米团簇
过电位
催化作用
电子转移
金属
铂金
材料科学
碳纤维
化学
化学物理
无机化学
光化学
纳米技术
物理化学
电化学
电极
有机化学
冶金
复合材料
复合数
作者
Qiangqiang Yan,Daoxiong Wu,Shengqi Chu,Zhi-Qin Chen,Yue Lin,Ming‐Xi Chen,Jing Zhang,Xiaojun Wu,Hai‐Wei Liang
标识
DOI:10.1038/s41467-019-12851-w
摘要
Abstract Metal–support interaction is of great significance for catalysis as it can induce charge transfer between metal and support, tame electronic structure of supported metals, impact adsorption energy of reaction intermediates, and eventually change the catalytic performance. Here, we report the metal size-dependent charge transfer reversal, that is, electrons transfer from platinum single atoms to sulfur-doped carbons and the carbon supports conversely donate electrons to Pt when their size is expanded to ~1.5 nm cluster. The electron-enriched Pt nanoclusters are far more active than electron-deficient Pt single atoms for catalyzing hydrogen evolution reaction, exhibiting only 11 mV overpotential at 10 mA cm −2 and a high mass activity of 26.1 A mg −1 at 20 mV, which is 38 times greater than that of commercial Pt/C. Our work manifests that the manipulation of metal size-dependent charge transfer between metal and support opens new avenues for developing high-active catalysts.
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