质子交换膜燃料电池
铂金
炭黑
催化作用
材料科学
碳纤维
化学工程
电化学
粒子(生态学)
透射电子显微镜
阴极
纳米颗粒
旋转圆盘电极
电极
电流密度
粒径
纳米技术
复合材料
化学
循环伏安法
有机化学
工程类
物理化学
地质学
物理
天然橡胶
海洋学
复合数
量子力学
作者
Gregor S. Harzer,Alin Orfanidi,Hany A. El‐Sayed,Pankaj Madkikar,Hubert A. Gasteiger
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2018-01-01
卷期号:165 (10): F770-F779
被引量:87
摘要
The effect of the catalyst synthesis method on the location of platinum nanoparticles on a high surface area Ketjenblack is investigated with respect to the high current density performance in low loaded proton exchange membrane fuel cells (PEMFC). Catalysts were prepared using various synthetic methods to deposit platinum nanoparticles at different locations on the carbon surface, e.g. inside or outside the pores of the primary particle. Transmission electron microscopy (TEM) suggested, that the Pt-particle deposition can be controlled to be preferentially on the outer carbon surface or within the pores. Electrochemical characterization was performed in thin-film rotating disk electrode (RDE) setup as well as in 5 cm2 single cell MEA tests. Although the carbon support was identical for all catalysts, the one with more Pt particles deposited on the outer carbon surface performed superior at high current which was attributed to a lower oxygen mass transport resistance. From the presented data, it can be concluded that not only the type or the surface area of the carbon black support affects the fuel cell performance, but that the synthesis approach is an additional parameter to tune the fuel cell performance at high current density.
科研通智能强力驱动
Strongly Powered by AbleSci AI