Because of modern social problems such as an environmental pollution and energy crisis, polymer electrolyte fuel cell (PEFC) has been expected as one of the clean and high power sources. PEFC should require Pt as a cathode catalyst. However, electrocatalytic activity of Pt is not enough to operate PEFC and moreover, Pt is precious and expensive. Thus, in order to use PEFC generally, electrocatalytic activity of Pt and loading amount of Pt should be increased and decreased, respectively. On the other hand, ultrathin metal layers formed on the different metal substrate often have higher electrocatalytic activity than substrate and deposited metals. In this study, we try to construct Pt ultrathin films on Co substrate surface using galvanic replacement method and structure of the prepared Pt ultrathin films on Co was investigated by angle-resolved X-ray photoelectron spectroscopy (ARXPS). Based on the ARXPS results, we confirmed that Pt ultrathin films formed on the Co surface by galvanic replacement.

Construction of Pt ultrathin films on Co substrate surface using galvanic replacement

248th National Meeting (2014)

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