Evaluation for sintering of electrocatalysts and its effect on voltage drops in high-temperature proton exchange membrane fuel cells (HT-PEMFC)

被引：30
作者：
Suzuki, Ai [1 ]
Oono, Yuka [2 ]
Williams, Mark C. [1 ]
Miura, Ryuji [1 ]
Inaba, Kenji [1 ]
Hatakeyama, Nozomu [1 ]
Takaba, Hiromitsu [1 ]
Hori, Michio [2 ]
Miyamoto, Akira [1 ]
机构：
[1] Tohoku Univ, New Ind Creat Hatchery Ctr, Aoba Ku, Sendai, Miyagi 9808579, Japan
[2] Daido Univ, Fuel Cell Res Ctr, Minami Ku, Nagoya, Aichi 4578530, Japan
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2012年 / 37卷 / 23期
关键词：
High-temperature PEMFC; Sintering; Voltage drops; Electrocatalyst; Phosphoric acid; Durability; ACID-DOPED POLYBENZIMIDAZOLE; GAS-DIFFUSION ELECTRODES; PHOSPHORIC-ACID; CATALYST LAYER; OXYGEN REDUCTION; MATHEMATICAL-MODEL; PERFORMANCE DEGRADATION; NUMERICAL-SIMULATION; NONISOTHERMAL MODEL; MASS-TRANSPORT;
D O I：
10.1016/j.ijhydene.2012.09.016
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：
Durability performance such as sintering and voltage drops of HT-PEMFC was theoretically evaluated under non-humid conditions at 150 degrees C, 170 degrees C and 190 degrees C. The quantum chemical molecular dynamics showed that the affinity of the platinum (Pt) electxocatalysts with carbon support decreased with increasing temperature. The degree of agglomeration of electrocatalysts over time simulated by three-dimensional kinetic Monte Carlo method was compared and quantitatively agreed with experimentally measured Transmission Electron Microscopy (TEM) results. Agglomeration of electrocatalysts due to the sintering caused losses of electrochemically active surface area, and found to be occurred more severe as temperature increased. Decreased rate of the proton conductivity due to the evaporation of phosphoric acid affected voltage drops as temperature increased. A theoretical breakdown of the voltage drops indicated that the voltage drops that occurred during the first several hundreds of hours and those occurring for the latter stage were due to different effects. Copyright (c) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：18272 / 18289
页数：18
相关论文
共 82 条
[11]   The diffusive tortuosity of fine-grained unlithified sediments [J].
Boudreau, BP .
GEOCHIMICA ET COSMOCHIMICA ACTA, 1996, 60 (16) :3139-3142
[12]   Measurements of proton conductivity in the active layer of PEM fuel cell gas diffusion electrodes [J].
Boyer, C ;
Gamburzev, S ;
Velev, O ;
Srinivasan, S ;
Appleby, AJ .
ELECTROCHIMICA ACTA, 1998, 43 (24) :3703-3709
[13]  
Bronin D., 2008, P 8 EUR SOL OX FUEL, pB1001
[14]   Mathematical model of a PEMFC using a PBI membrane [J].
Cheddie, D ;
Munroe, N .
ENERGY CONVERSION AND MANAGEMENT, 2006, 47 (11-12) :1490-1504
[15]   Parametric model of an intermediate temperature PEMFC [J].
Cheddie, Denver ;
Munroe, Nonnan .
JOURNAL OF POWER SOURCES, 2006, 156 (02) :414-423
[16]   Three dimensional modeling of high temperature PEM fuel cells [J].
Cheddie, Denver F. ;
Munroe, Norman D. H. .
JOURNAL OF POWER SOURCES, 2006, 160 (01) :215-223
[17]   Characterization and fault diagnosis of PAFC cathode by EIS technique and a novel mathematical model approach [J].
Choudhury, Suman Roy ;
Rengaswamy, Raghunathan .
JOURNAL OF POWER SOURCES, 2006, 161 (02) :971-986
[18]   TEMPERATURE-DEPENDENCE OF THE TAFEL SLOPE FOR OXYGEN REDUCTION ON PLATINUM IN CONCENTRATED PHOSPHORIC-ACID [J].
CLOUSER, SJ ;
HUANG, JC ;
YEAGER, E .
JOURNAL OF APPLIED ELECTROCHEMISTRY, 1993, 23 (06) :597-605
[19]   Performance analysis of the ordered and the conventional catalyst layers in proton exchange membrane fuel cells [J].
Du, C. Y. ;
Yang, T. ;
Shi, R. F. ;
Yin, G. P. ;
Cheng, X. Q. .
ELECTROCHIMICA ACTA, 2006, 51 (23) :4934-4941
[20]   Instability of Pt/C electrocatalysts in proton exchange membrane fuel cells - A mechanistic investigation [J].
Ferreira, PJ ;
la O', GJ ;
Shao-Horn, Y ;
Morgan, D ;
Makharia, R ;
Kocha, S ;
Gasteiger, HA .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2005, 152 (11) :A2256-A2271
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