PEMFC催化层中PTFE和Nafion对催化剂利用率的影响

电化学（中英文） ›› 1999, Vol. 5 ›› Issue (2): 218-223.

PEMFC催化层中PTFE和Nafion对催化剂利用率的影响

程晓亮,衣宝廉,张景新,韩明,乔亚光

中科院大连化学物理研究所

收稿日期:1999-05-28 修回日期:1999-05-28 出版日期:1999-05-28 发布日期:1999-05-28

Influence of PTFE and Nafion on the UtilizationEfficiency of Pt/C Catalyst in PEMFC

Cheng Xiaoliang* Yi Baolian Zhang Jingxin Han Ming Qiao Yaguang

(Dalian Inst. of Chem. Phys., Chinese Acad. of Sci., Dalian116023

Received:1999-05-28 Revised:1999-05-28 Published:1999-05-28 Online:1999-05-28

摘要/Abstract

摘要： 本文利用循环伏安法，结合透射电镜和扫描电镜研究了质子膜燃料电池催化层中加入的聚四氟乙烯（ＰＴＦＥ）和全氟磺酸树脂（Ｎａｆｉｏｎ）对催化剂利用率的影响．ＰＴＦＥ对催化剂利用率的影响很小．但在亲水型电极中，催化剂颗粒之间的电子导通会受到Ｎａｆｉｏｎ的阻碍，并导致催化剂利用率降低．由于Ｎａｆｉｏｎ分子很小，因此与Ｐｔ／Ｃ中Ｐｔ颗粒的接触没有大问题

关键词: 聚四氟乙烯, 全氟磺酸树脂, 质子膜燃料电池

Abstract: With cycling voltammetry curve(C-V), TEM and SEM photographs, the influence of PTFE and Nafion on the platinum utilization in catalyst layer of PEMFC was investigated. The results show that in gas diffusion electrode, the blocking effect of PTFE in the platinum utilization is not pronunced. In the thin_film catalyst layer, the electron conduct of the catalyst was blocked by the nafion solid and this caused the decrease of platinum utilization. With the increase of the nafion content in the catalyst layer, both platinum utilization and the electron conductivity decreased in the catalyst layer. Because the molecule size of nafion is smaller than that of Pt particles, there should no big problem for the contact between nafion and Pt particles.

Key words: PTFC, Nafion, PEMFC, Platinum utilization

中图分类号:

O632.21

程晓亮,衣宝廉,张景新,韩明,乔亚光. PEMFC催化层中PTFE和Nafion对催化剂利用率的影响[J]. 电化学（中英文）, 1999, 5(2): 218-223.

Cheng Xiaoliang* Yi Baolian Zhang Jingxin Han Ming Qiao Yaguang . Influence of PTFE and Nafion on the UtilizationEfficiency of Pt/C Catalyst in PEMFC[J]. Journal of Electrochemistry, 1999, 5(2): 218-223.

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链接本文: https://electrochem.xmu.edu.cn/CN/

https://electrochem.xmu.edu.cn/CN/Y1999/V5/I2/218

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