钴-聚吡咯-碳载Pt催化剂的制备及其单电池性能研究

张路; 林瑞; 黄真; 范仁杰

钴-聚吡咯-碳载Pt催化剂的制备及其单电池性能研究

张路^1,2,
林瑞^1,2,,
黄真^1,2,
范仁杰^1,2

1.
同济大学新能源汽车工程中心, 上海 201804;
2.
同济大学汽车学院, 上海 201804

基金项目: 国家自然科学基金(21276199); 中央高校基本科研业务费专项资金及同济大学青年英才计划攀登高层次人才项目。

详细信息

通讯作者:
林瑞,Tel:+86-21-69583837,E-mail:ruilin@tongji.edu.cn。

中图分类号: O643
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- 被引次数: 0
出版历程
- 收稿日期: 2014-09-09
- 刊出日期: 2015-03-30

Study on preparation of cobalt-polypyrrole-carbon black supported Pt catalyst and its single cell performance

ZHANG Lu^1,2,
LIN Rui^{1,2
,},
HUANG Zhen^1,2,
FAN Ren-jie^1,2

1.
Clean Energy Automotive Engineering Center, Tongji University, Shanghai 201804, China;
2.
School of Automotive Studies, Tongji University, Shanghai 201804, China

摘要

摘要: 采用脉冲微波辅助化学还原法制备了钴-聚吡咯-碳载Pt催化剂(Pt/Co-PPy-C),并将其作为阴极催化剂,组装单电池。考察了电池运行温度和氢气/空气计量比对单电池性能的影响,并与商业Pt/C催化剂进行了耐久性实验比较。结果表明,运行温度为70 ℃,氢气与空气的计量比为1.2:2.5时单电池性能最佳。600 mA/cm²恒电流稳定运行150 h耐久性测试中,以Pt/Co-PPy-C为阴极催化剂的单电池平均电压衰退率为0.119 mV/h,是商业Pt/C催化剂的26%。耐久性测试前后,单电池的阴极电荷传递阻抗为7.176和8.767 Ω,均比商业Pt/C催化剂阻抗小;Pt颗粒粒径从2.46 nm增长到3.18 nm,均小于商业Pt/C催化剂的粒径。这表明,以Pt/Co-PPy-C催化剂为阴极催化剂制备的单电池性能优良,在质子交换膜燃料电池中有广泛的应用前景。
- 聚吡咯 /
- 燃料电池 /
- 阴极催化剂 /
- 单电池 /
- 耐久性 /
- 氧还原反应
Abstract: Cobalt-polypyrrole-carbon black supported Pt catalyst (Pt/Co-PPy-C) was prepared by pulse-microwave assisted chemical reduction and used as a cathode catalyst for oxygen reduction reaction (ORR) in a single cell; the influence of operation temperature and H₂/air stoichiometric ratio on the cell performances was investigated, in comparison with the commercial Pt/C catalyst. The results indicated that the cell performs best at 70 ℃ and with a H₂/Air ratio of 1.2:2.5. During the 150 h durability test at a galvanostatic operation condition of 600 mA/cm², the voltage degradation rate with Pt/Co-PPy-C as the cathode catalyst is 0.119 mV/h, about 26% of that with the commercial Pt/C catalyst. The cathode charge transfer impedances before and after durability test are about 7.176 and 8.767 mohm, respectively, much smaller than those with the Pt/C catalyst. The average particle size of Pt in Pt/Co-PPy-C is increased from 2.46 to 3.18 nm, also smaller than that for the Pt/C catalyst. The Pt/Co-PPy-C catalyst exhibits superior performance in ORR and may have an enormous application potential in fuel cell.
- polypyrrole /
- fuel cell /
- cathode catalyst /
- single cell /
- durability /
- oxygen reduction reaction

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参考文献(28)

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