High functionalization of core-shell type catalysts by controlling intermetallic structures

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K18243
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Material processing/Microstructural control engineering
• Research Institution: Tohoku University
• Principal Investigator: Todoroki Naoto 東北大学, 環境科学研究科, 助教 (10734345)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 固体高分子形燃料電池 / 酸素還元反応 / コアシェル触媒 / 白金基合金 / 合金単結晶 / 分子線エピタキシ

Outline of Final Research Achievements

Purpose of this study is to investigate effect of intermetallic structure formation in core-alloys of core-shell type catalysts for polymer electrolyte fuel cell on the electrocatalytic properties, using alloy single crystal as model catalysts. First, we investigated electrocatalytic properties of Pt3Co(111) and found that thermal annealing for intermetallic structure formation leads to enhancement both of catalytic activity and durability in comparison with annealing for solid solution formation. Next, we also demonstrated that Pt-monolayers on Ir(111) substrate show highlt-enhanced electrocatalytic properties. The results obtained provide new guideline for development of core-shell type catalysts for fuel cells.

Free Research Field

電極触媒