Influence of Membrane Thickness on Membrane Degradation and Platinum Agglomeration under Long-term Open Circuit Voltage Conditions

被引：45

作者：

Zhao, Ming ^{[1
,2
]}

Shi, Weiyu ^{[3
]}

Wu, Bingbing ^{[1
,2
]}

Liu, Wenming ^{[1
,2
]}

Liu, Jianguo ^{[1
,2
]}

Xing, Danmin ^{[3
]}

Yao, Yingfang ^{[1
,2
]}

Hou, Zhongjun ^{[3
]}

Ming, Pingwen ^{[3
]}

Zou, Zhigang ^{[1
,2
]}

机构：

[1] Nanjing Univ, Ecomat & Renewable Energy Res Ctr, Dept Mat Sci & Engn, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[2] Nanjing Univ, Kunshan Innovat Inst, Nanjing 210093, Jiangsu, Peoples R China

[3] Sunrise Power Co Ltd, Dalian 116023, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2015年 / 153卷

基金：

国家高技术研究发展计划(863计划);

关键词：

OCV; hydrogen permeation; membrane degradation; platinum agglomeration; CATALYST LAYER DEGRADATION; FUEL-CELL DURABILITY; ELECTROCHEMICAL DEGRADATION; CHEMICAL DEGRADATION; PEMFC PERFORMANCE; DIFFUSION; NAFION; ELECTROCATALYSTS; DISSOLUTION; MECHANISM;

D O I：

10.1016/j.electacta.2014.12.024

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Membrane chemical degradation and platinum catalyst agglomeration under long-term open circuit voltage (OCV) conditions were investigated using three types of composite membranes with various membrane thicknesses. Hydrogen permeation increases as membrane thickness decreases, which has a significant influence on proton exchange membrane and platinum catalysts. Higher Hydrogen permeation accelerated the membrane degradation, resulting in the thinning of membrane which can be verified by fluoride emission rates (FERs). Carbon-supported platinum catalysts also experienced agglomeration under OCV conditions. The statistics of platinum size distribution demonstrated catalysts size growth, ranging from 3.83 to 6.02nm in diameter along with the increasing hydrogen crossover (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：254 / 262

页数：9

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