Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 8, Issue 21, Pages 5360-5365Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.7b02525
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Funding
- New Energy and Industrial Technology Development Organization (NEDO) of Japan
- Japan Society for the Promotion of Science
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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.
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