The Oxygen Reduction Reaction on Kinked Stepped Surfaces of Pt

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• 作者：Fumiya Sugimura ; Masashi Nakamura ; Nagahiro Hoshi
• 关键词：Oxygen reduction reaction ; Kinked stepped surface ; High index plane ; Pt oxides
• 刊名：Electrocatalysis
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：8
• 期：1
• 页码：46-50
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Electrochemistry; Physical Chemistry; Catalysis; Energy Technology;
• 出版者：Springer US
• ISSN：1868-5994
• 卷排序：8

文摘

The oxygen reduction reaction (ORR) has been studied on kinked stepped surfaces of Pt inside the stereographic triangle with the use of rotating disk electrode (RDE) in 0.1 M HClO₄. The kinked stepped surfaces are composed of (331) = 3(111)-(111) structure of which step line contains (100) kink: 3(111) − [m(111) + (100)], where m denotes the number of straight step atoms. The activity for the ORR decreases with increasing the kink atom density d_k of the surface with m = 1, 3, 6, and 21, whereas the surface with m = 11 has specifically high activity for the ORR. The activity on Pt(16 15 5) = 3(111) − [11(111)-(100)] exceeds that of Pt(331) that gives the highest activity in stepped surfaces. The electricity of Pt oxide formation on Pt(16 15 5) m = 11 is the lowest in the kinked stepped surfaces examined.