铂金
催化作用
电催化剂
纳米结构
氧还原反应
材料科学
氧还原
电化学
化学工程
还原(数学)
纳米技术
析氧
过电位
化学
塔菲尔方程
纳米棒
无机化学
燃料电池
铂纳米粒子
分解水
氧气
氧化还原
电极
有机化学
几何学
物理化学
工程类
数学
作者
Guang-Rui Xu,Bin Wang,Jingyi Zhu,Fengyi Liu,Yu Chen,Jing Zeng,Jia-Xing Jiang,Zong-Huai Liu,Yawen Tang,Jong-Ho Lee
标识
DOI:10.1021/acscatal.6b01440
摘要
The catalytic performance of noble metal nanocrystals highly depends on their surface structure and interface structure. Effective surface/interface control over noble metal nanocrystals can significantly improve their electrocatalytic activity, durability, and selectivity for the various important electrochemical reactions in low-temperature polymer electrolyte fuel cells. In this work, the polyallylamine (PAA)-functionalized Pt nanostructures with long-spined sea-urchin-like morphology (Pt-LSSUs@PAA) have been synthesized successfully through a simple chemical reduction route. The high branching degree of Pt-LSSUs@PAA nanostructures and the sheet morphology of the branches effectively improve the utilization of the Pt metal. The particular 3D interconnected architecture of Pt-LSSUs@PAA nanostructures significantly enhances the electrochemical stability. Loose-packed PAA layers on the surface of Pt-LSSUs@PAA nanostructures efficiently modify the electronic property of Pt atoms and serve as barrier networ...
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