Oxygen reduction reaction activity of Pt/Ni/Pt(111) well-defined model catalyst surfaces

N. Todoroki, Y. Asakimori, T. Wadayama

Research output: Contribution to journalArticle

Abstract

In this study, we have investigated the oxygen reduction reaction (ORR) activity of Pt/Ni/Pt(111) model catalyst surfaces prepared by molecular beam epitaxy. Compared with Pt(111), 1-4-monolayer-thick Pt on Ni/Pt(111) surfaces showed 9-, 12-, 8-, and 7-fold higher activities, respectively. Cyclic voltammetry measurements and X-ray photoelectron spectroscopic analysis clearly revealed that electrochemical and electronic properties of the Pt(111) surface lattice approach those of clean Pt(111) surface with increasing Pt surface layer thickness. The results demonstrated that tuning Pt shell thickness is a key for generating highly active Pt-bimetallic catalysts for ORR.

Original languageEnglish
Pages (from-to)565-573
Number of pages9
JournalECS Transactions
Volume58
Issue number1
DOIs
Publication statusPublished - 2013

ASJC Scopus subject areas

  • Engineering(all)

Fingerprint Dive into the research topics of 'Oxygen reduction reaction activity of Pt/Ni/Pt(111) well-defined model catalyst surfaces'. Together they form a unique fingerprint.

  • Cite this