Highly stable Ti-Co-Phen/C catalyst as the cathode for proton exchange membrane fuel cells

被引：2
作者：
Yin, Fengxiang [1 ,2 ]
Li, Guoru [2 ]
机构：
[1] Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China
[2] Beijing Univ Chem Technol, Changzhou Inst Adv Mat, Changzhou 213164, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2014年 / 39卷 / 19期
基金：
中国国家自然科学基金;
关键词：
Oxygen reduction reaction; Non-precious metal catalyst; 1,10-phenanthroline; Polymer complex; Polymer electrolyte membrane fuel cells; OXYGEN-REDUCTION REACTION; METAL-CATALYSTS; ELECTROCATALYSTS; PERFORMANCE; IRON; NIOBIUM;
D O I：
10.1016/j.ijhydene.2014.04.175
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：
A Ti-Co-Phen/C catalyst was prepared for polymer electrolyte membrane fuel cells (PEMFCs) without precious metals using a modified polymer complex (PC) method with 1,10-phenanthroline (Phen) as the nitrogen precursor. The oxygen reduction reaction (ORR) activity of the Ti-Co-Phen/C catalyst was significantly higher than the ORR activity of the Ti-Co/C catalyst prepared with the PC method because the former had a larger N surface content due to its highly dispersed Co species. The catalyst also exhibited excellent chemical stability in acidic media due to the probable strong interactions between the highly dispersed Ti and Co species. A H-2/O-2 PEMFC using the Ti-Co-Phen/C catalyst as the cathode demonstrated excellent cell performance. A 0.68 W cm(-2) maximum power density was obtained. The cell performance stability did not drop perceptibly during its 550-h lifetime at 0.5 V and its 300-h lifetime at 0.7 V. The prepared Ti-Co-Phen/C catalyst exhibited both high ORR activity and excellent performance stability, making it a promising alternative for the cathode catalysts in PEMFCs. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：10253 / 10257
页数：5
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