铂金
材料科学
镍
合金
纳米线
催化作用
冶金
纳米技术
化学工程
化学
生物化学
工程类
作者
Mufan Li,Zipeng Zhao,Tao Cheng,Alessandro Fortunelli,Chih-Yen Chen,Rong Yu,Qinghua Zhang,Lin Gu,Boris V. Merinov,Zhaoyang Lin,Enbo Zhu,Ted H. Yu,Qingying Jia,Jinghua Guo,Liang Zhang,William A. Goddard,Yu Huang,Xiangfeng Duan
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2016-12-16
卷期号:354 (6318): 1414-1419
被引量:1214
标识
DOI:10.1126/science.aaf9050
摘要
An activity lift for platinum Platinum is an excellent but expensive catalyst for the oxygen reduction reaction (ORR), which is critical for fuel cells. Alloying platinum with other metals can create shells of platinum on cores of less expensive metals, which increases its surface exposure, and compressive strain in the layer can also boost its activity (see the Perspective by Stephens et al. ). Bu et al. produced nanoplates—platinum-lead cores covered with platinum shells—that were in tensile strain. These nanoplates had high and stable ORR activity, which theory suggests arises from the strain optimizing the platinum-oxygen bond strength. Li et al. optimized both the amount of surface-exposed platinum and the specific activity. They made nanowires with a nickel oxide core and a platinum shell, annealed them to the metal alloy, and then leached out the nickel to form a rough surface. The mass activity was about double the best reported values from previous studies. Science , this issue p. 1410 , p. 1414 ; see also p. 1378
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