Ultrahigh Vacuum Synthesis of Strain-Controlled Model Pt(111)-Shell Layers: Surface Strain and Oxygen Reduction Reaction Activity

Soma Kaneko, Rikiya Myochi, Shuntaro Takahashi, Naoto Todoroki, Toshimasa Wadayama, Tadao Tanabe

研究成果: Article査読

12 被引用数 (Scopus)

抄録

In this study, we perform ultrahigh vacuum (UHV) and arc-plasma synthesis of strain-controlled Pt(111) model shells on Pt-Co(111) layers with various atomic ratios of Pt/Co and an oxygen reduction reaction (ORR) activity enhancement trend against the surface strain induced by lattice mismatch between the Pt shell and Pt-Co alloy-core interface structures was observed. The results showed that the Pt(111)-shell with 2.0% compressive surface strain vs intrinsic Pt(111) lattice gave rise to a maximum activity enhancement, ca. 13-fold higher activity than that of clean Pt(111). This study clearly demonstrates that the UHV-synthesized, strain-controlled Pt shells furnish useful surface templates for electrocatalysis.

本文言語English
ページ(範囲)5360-5365
ページ数6
ジャーナルJournal of Physical Chemistry Letters
8
21
DOI
出版ステータスPublished - 2017 11 2
外部発表はい

ASJC Scopus subject areas

  • 材料科学(全般)
  • 物理化学および理論化学

フィンガープリント

「Ultrahigh Vacuum Synthesis of Strain-Controlled Model Pt(111)-Shell Layers: Surface Strain and Oxygen Reduction Reaction Activity」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル