Non-destructive transmission electron microscopy study of catalyst degradation under electrochemical treatment
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- 作者：Karl J.J. Mayrhofer ; Sean J. Ashton ; Josef C. Meier ; Gustav K.H. Wiberg ; Marianne Hanzlik ; Matthias Arenz
- 关键词：Fuel cell ; Catalyst degradation ; Transmission electron microscopy ; Accelerated electrocatalyst testing
- 刊名：Journal of Power Sources
- 出版年：2008
- 出版时间：1 December 2008
- 年：2008
- 卷：185
- 期：2
- 页码：734-739
- 全文大小：1544 K
文摘
A novel, non-destructive transmission electron microscopy technique is introduced, which enables the observation of the identical locations of a catalyst before and after electrochemical treatment (IL-TEM). The significance of this method is exemplified by the analysis of a standard, commercially available carbon supported platinum catalyst. We demonstrate that the observed changes of the catalyst particles are a direct consequence of the applied electrochemical treatment; and that selected catalyst regions are representative for the catalyst as a whole. Different electrochemical treatments were applied in order to discuss the potential of the method for studying processes of catalyst degradation.