Layer-by-layer films of chitosan, poly(vinyl sulfonic acid), and platinum for methanol electrooxidation and oxygen electroreduction

被引：29

作者：

Cogo, Luciano C.

Batisti, Marcos V.

Pereira-da-Silva, Marcelo A.

Oliveira, Osvaldo N., Jr.

Nart, Francisco C.

Huguenin, Fritz ^{[1
]}

机构：

[1] Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Pret, Dept Quim, BR-14040901 Ribeirao Preto, SP, Brazil

[2] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil

[3] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil

来源：

JOURNAL OF POWER SOURCES | 2006年 / 158卷 / 01期

基金：

巴西圣保罗研究基金会;

关键词：

layer-by-layer; chitosan; self-assembly; fuel cell; oxygen reduction reaction;

D O I：

10.1016/j.jpowsour.2005.10.004

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We describe an approach for manipulation of biodegradable chitosan and poly(vinyl sulfonic acid) (PVS) in layer-by-layer (LBL) film adsorbed onto gold via ionic attraction. H2PtCl6 was deposited onto the LBL film, with chitosan/PVS layers serving as templates to yield metallic platinum. In electrochemical experiments this LBL film exhibited electrochemical stability, low permeability to methanol and conduction/diffusion of proton to maintain the electrolytic connection. The Pt/chitosan/PVS electrode also displayed electroreduction of molecular oxygen. With these features, this Pt/chitosan/PVS film may be used between the catalyst layer and the proton exchange membrane (PEM) in direct methanol fuel cells (DMFC) and biofuel cells. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：160 / 163

页数：4

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