Imaging of highly oriented pyrolytic graphite corrosion accelerated by Pt particles |
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| Institution: | 1. Research Institute for Ubiquitous Energy Devices, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan;2. Faculty of Engineering, Doshisha University, Kyotanabe-shi, Kyoto 610-0321, Japan;1. Department of Chemistry, College of Science, Huazhong Agricultural University, 430070, Wuhan, PR China;2. Institute for Interdisciplinary Research, Jianghan University, 430056, Wuhan, PR China;1. Guangxi Key Laboratory of Low Carbon Energy Materials, College of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China;2. State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;3. Guangxi Vocational & Technical Institute of Industry, Nanning 530001, China;1. Nano-Science Center, Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark;2. Physics Department E19, Technical University of Munich, James-Franck-Str. 1, D-85747 Garching, Germany;3. Department of Chemical Sciences, Via Marzolo 1, 35131 Padova, Italy;4. Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark;5. Sino-Danish Center for Education and Research (SDC) Niels Jensens Vej 2, Aarhus DK-8000, Denmark |
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| Abstract: | Carbon corrosion that is presumed to occur at the proton exchange membrane fuel cell (PEMFC) cathode was visualized by atomic force microscopy (AFM) and field emission-scanning electron microscopy (FE-SEM) observations using a fundamental model electrode. Platinum nanoparticles were deposited on a highly oriented pyrolytic graphite (HOPG) substrate as a model cathode catalyst, and its stability in an acid solution at a fixed potential was investigated. The formation of blisters on the surface of the model electrode was observed by AFM after it was kept at 1.0 V vs. RHE, especially at and around the Pt particles. FE-SEM observations using a backscattered electron detector revealed that Pt particles remained unchanged at their original positions after the formation of blisters. |
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