Ptshell-Aucore/C electrocatalyst with a controlled shell thickness and improved Pt utilization for fuel cell reactions

被引：144

作者：

Kristian, Noel ^{[1
]}

Wang, Xin ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Chem & Biomed Engn, Singapore 637459, Singapore

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2008年 / 10卷 / 01期

关键词：

electrocatalyst; core-shell; fuel cell; platinum; gold;

D O I：

10.1016/j.elecom.2007.10.011

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Nanoscale Pt-shell-Au-core/C with a controlled shell thickness was successfully synthesized based on a successive reduction strategy. With a Au core size of 4.8 mm, a complete Pt shell of thickness similar to 0.6 mm was formed at Pt/Au mole ratio 1:1. The complete coverage of Au core with Pt shell was suggested by various techniques including TEM, UV-vis and cyclic voltammetry. A higher specific activity compared to conventional Pt/C was demonstrated using the probe reaction of methanol electro-oxidation, proving the improved Pt utilization with this core-shell structure. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：12 / 15

页数：4

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