Electrochemical Activity and Catalyst Utilization of Low Pt and Thickness Controlled Membrane Electrode Assemblies

被引：44

作者：

Saha, Madhu S. ^{[1
]}

Malevich, Dzmitry ^{[1
]}

Halliop, Ela ^{[1
]}

Pharoah, Jon G. ^{[1
,3
]}

Peppley, Brant A. ^{[1
,2
]}

Karan, Kunal ^{[1
,2
]}

机构：

[1] Queens RMC Fuel Cell Res Ctr, Kingston, ON K7L 5L9, Canada

[2] Queens Univ, Dept Chem Engn, Kingston, ON K7L 3N6, Canada

[3] Queens Univ, Dept Mech & Mat Engn, Kingston, ON K7L 3N6, Canada

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2011年 / 158卷 / 05期

基金：

加拿大自然科学与工程研究理事会;

关键词：

FUEL-CELLS; ULTRA-LOW; OXYGEN REDUCTION; LOADING ELECTRODES; PERFORMANCE; PLATINUM; CO; NANOPARTICLES; OXIDATION; KINETICS;

D O I：

10.1149/1.3559188

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

An improved catalyst deposition methodology based on a piezo-electric printing technique has been developed and used to fabricate catalyst coated membranes (CCM) with thin catalyst layers (1-5 mu m) and ultra-low Pt loadings (0.02-0.12 mg(Pt)/cm(2)). The performance of these CCMs was examined in proton exchange membrane fuel cells (PEMFCs). The catalyst utilization was observed to increase with decreasing catalyst layer thickness (decreasing Pt loading). The printed CCM with two layers containing an ultra-low Pt loading (0.02 mg(Pt)/cm(2)) exhibited Pt utilizations of 100%. Neglecting the anode contributions, the mass activity at 850 mV for the printed CCM is nearly 76.5 mA/mg(Pt) which is 3.5 times higher than that for the CCM fabricated by conventional spraying method (22.5 mA/mg(Pt)). (C) 2011 The Electrochemical Society. [DOI: 10.1149/1.3559188] All rights reserved.

引用

页码：B562 / B567

页数：6

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