期刊
NANO LETTERS
卷 -, 期 -, 页码 -出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.2c02572
关键词
Atomic layer; surface engineering; strain engineering; ethanol electrooxidation
类别
资金
- National Key R & D Program of China [2018YFA0702003]
- National Natural Science Foundation of China [21890383, 21871159]
- Science and Technology Key Project of Guangdong Province of China [2020B010188002]
- National Postdoctoral Program for Innovative Talents [BX20180160]
- China Postdoctoral Science Foundation [2018M640113]
- startup fund of Westlake University
This study reports a highly efficient and stable electrocatalyst with defect-rich Pt atomic layers coating an ordered Pt3Sn intermetallic core. The synergetic controls of surface and strain engineering lead to remarkable enhancement on ethanol electrooxidation performance, as well as outstanding durability.
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 (-1)(Pt), 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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