金属间化合物
材料科学
电催化剂
极限抗拉强度
拉伤
涂层
催化作用
图层(电子)
化学工程
电化学
复合材料
化学
物理化学
合金
电极
有机化学
医学
内科学
工程类
作者
Yuanjun Chen,Jiajing Pei,Zhe Chen,Ang Li,Shufang Ji,Hongpan Rong,Qian Xu,Tao Wang,Aojie Zhang,Haolin Tang,Junfa Zhu,Xiaodong Han,Zhongbin Zhuang,Gang Zhou,Dingsheng Wang
出处
期刊:Nano Letters
[American Chemical Society]
日期:2022-09-14
卷期号:22 (18): 7563-7571
被引量:45
标识
DOI:10.1021/acs.nanolett.2c02572
摘要
Surface and strain engineering are two effective strategies to improve performance; however, synergetic controls of surface and strain effects remains a grand challenge. Herein, we report a highly efficient and stable electrocatalyst with defect-rich Pt atomic layers coating an ordered Pt3Sn intermetallic core. Pt atomic layers enable the generation of 4.4% tensile strain along the [001] direction. Benefiting from synergetic controls of surface and strain engineering, Pt atomic-layer catalyst (Ptatomic-layer) achieves a remarkable enhancement on ethanol electrooxidation performance with excellent specific activity of 5.83 mA cm-2 and mass activity of 1166.6 mA mg Pt-1, which is 10.6 and 3.6 times higher than the commercial Pt/C, respectively. Moreover, the intermetallic core endows Ptatomic-layer with outstanding durability. In situ infrared reflection-absorption spectroscopy as well as density functional theory calculations reveal that tensile strain and rich defects of Ptatomci-layer facilitate to break C-C bond for complete ethanol oxidation for enhanced performance.
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