Oxygen Reduction Reaction Activity of Pt/Ni/Pt(111) Well-defined Model Catalyst Surfaces

被引：0
|
作者：
Todoroki, N. [1 ]
Asakimori, Y. [1 ]
Wadayama, T. [1 ]
机构：
[1] Tohoku Univ, Grad Sch Environm Studies, Sendai, Miyagi 9808579, Japan
来源：
POLYMER ELECTROLYTE FUEL CELLS 13 (PEFC 13) | 2013年 / 58卷 / 01期
关键词：
NI; FE; NANOPARTICLES; PT(111); ALLOYS; XPS; CO;
D O I：
10.1149/05801.0565ecst
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
In this study, we have investigated the oxygen reduction reaction (ORR) activity of Pt/Ni/Pt(111) model catalyst surfaces prepared by molecular beam epitaxy. Compared with Pt(111), 1-4-monolayer-thick Pt on Ni/Pt(111) surfaces showed 9-, 12-, 8-, and 7-fold higher activities, respectively. Cyclic voltammetry measurements and X-ray photoelectron spectroscopic analysis clearly revealed that electrochemical and electronic properties of the Pt(111) surface lattice approach those of clean Pt(111) surface with increasing Pt surface layer thickness. The results demonstrated that tuning Pt shell thickness is a key for generating highly active Pt-bimetallic catalysts for ORR.
引用
收藏
页码：565 / 573
页数：9
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