郭少军
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郭少军
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论文成果
Biaxially Strained PtPb/Pt Core/Shell Nanoplate Boosts Oxygen Reduction Catalysis
发布时间：2023-04-14点击次数：
影响因子：
0.0
DOI码：
10.1126/science.aah6133
发表刊物：
Science
摘要：
Compressive surface strains have been necessary to boost oxygen reduction reaction (ORR) activity in core/shell M/platinum (Pt) catalysts (where M can be nickel, cobalt, or iron). We report on a class of platinum-lead/platinum (PtPb/Pt) core/shell nanoplate catalysts that exhibit large biaxial strains.The stable Pt (110) facets of the nanoplates have high ORR specific and mass activities that reach 7.8 milliampere (mA) per centimeter squared and 4.3 ampere per milligram of platinum at 0.9 volts versus the reversible hydrogen electrode (RHE), respectively. Density functional theory calculations reveal that the edge-Pt and top
(bottom)–Pt (110) facets undergo large tensile strains that help optimize the Pt-O bond strength.The intermetallic core and uniform four layers of Pt shell of the PtPb/Pt nanoplates appear to underlie the high endurance of these catalysts, which can undergo 50,000 voltage cycles with negligible activity decay and no apparent structure and composition changes.
论文类型：
期刊论文
文献类型：
J
卷号：
354
页面范围：
1410
是否译文：
否
发表时间：
2016-01-01
收录刊物：
SCI