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Advances in Physical Chemistry
Volume 2011 (2011), Article ID 821916, 13 pages
http://dx.doi.org/10.1155/2011/821916
Review Article

Nanoporous PdCo Catalyst for Microfuel Cells: Electrodeposition and Dealloying

1International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Ibaraki 305-0044, Japan
2Nano-Science and Engineering, Applied Chemistry, Graduate School of Advanced Science and Engineering, Waseda University, Tokyo 169-8555, Japan

Received 5 May 2011; Accepted 17 June 2011

Academic Editor: Milan M. Jaksic

Copyright © 2011 Satoshi Tominaka and Tetsuya Osaka. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

PdCo alloy is a promising catalyst for oxygen reduction reaction of direct methanol fuel cells because of its high activity and the tolerance to methanol. We have applied this catalyst in order to realize on-chip fuel cell which is a membraneless design. The novel design made the fuel cells to be flexible and integratable with other microdevices. Here, we summarize our recent research on the synthesis of nanostructured PdCo catalyst by electrochemical methods, which enable us to deposit the alloy onto microelectrodes of the on-chip fuel cells. First, the electrodeposition of PdCo is discussed in detail, and then, dealloying for introducing nanopores into the electrodeposits is described. Finally, electrochemical response and activities are fully discussed.