期刊
ACS NANO
卷 6, 期 11, 页码 9797-9806出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn304237u
关键词
platinum; branched structure; HCl; electrocatalysis; nanocrystal
类别
资金
- National Natural Science Foundation of China [21101145, J1030412]
- Recruitment Program of Global Experts
- CAS Hundred Talent Program
- St. Louis Institute of Nanomedicine
- Fundamental Research Funds for the Central Universities [WK2340000017]
- World-Class University Program (MEST through NRF) [R31-10026]
- NSF [ECS-0335765]
Structural control of branched nanocrystals allows tuning two parameters that are critical to their catalytic activity-the surface-to-volume ratio, and the number of atomic steps, ledges, and kinks on surface. In this work, we have developed a simple synthetic system that allows tailoring the numbers of branches in Pt nanocrystals by tuning the concentration of additional HCl. In the synthesis, HCl plays triple functions in tuning branched structures via oxidative etching: (i) the crystallinity of seeds and nanocrystals; (ii) the number of.{111} or {100} faces provided for growth sites; (iii) the supply kinetics of tetrapods, hexapods, and actopods with identical chemical environment-can be rationally synthesized In a single system by simply altering the etching strength The controllability in branched structures enables to reveal that their electrocatalytic performance can be optimized by constructing complex structures. Among various branched structures, Pt octopods exhibit particularly high activity In formic acid oxidation as compared with their counterparts and commercial Pt/C catalysts. It Is anticipated that this work will open a door to design more complex nanostructures and to achieve specific functions for various 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