期刊
CHEMICAL SCIENCE
卷 9, 期 2, 页码 398-404出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7sc02997g
关键词
-
资金
- National Natural Science Foundation of China [21671156, 21301138, 21571128, 21601118]
- U.S. National Science Foundation [CHE-1308587]
- Xi'an Jiaotong University
Ultrathin Pt nanostructures exposing controlled crystal facets are highly desirable for their superior activity and cost-effectiveness in the electrocatalytic oxygen reduction reaction (ORR), and they are conventionally synthesized by epitaxial growth of Pt on a limited range of templates, such as Pd nanocrystals, resulting in a high cost and less structural diversity of the ultrathin Pt nanostructures. To solve this problem, we demonstrate that ultrathin Pt nanostructures can be synthesized by templating conveniently available Ag nanocrystals without involving galvanic replacement, which enables a much-reduced cost and controllable new morphologies, such as ultrathin Pt nanoplates that expose the {111} facets. The resulting ultrathin Pt nanoplates are similar to 1-2 nm in thickness, which show an similar to 22-fold increase in specific activity (5.3 mA cm(-2)), an similar to 9.5-fold increase in mass activity (1.62 A mg(-1)) and significantly enhanced catalytic stability in the ORR, compared with the commercial Pt/C catalyst. We believe this strategy opens a door to a highly extendable family of ultrathin noble metal nanostructures, thus promising excellent activity and stability in a broad range of catalytic applications.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据