TY - JOUR
T1 - Ultrahigh Vacuum Synthesis of Strain-Controlled Model Pt(111)-Shell Layers
T2 - Surface Strain and Oxygen Reduction Reaction Activity
AU - Kaneko, Soma
AU - Myochi, Rikiya
AU - Takahashi, Shuntaro
AU - Todoroki, Naoto
AU - Wadayama, Toshimasa
AU - Tanabe, Tadao
N1 - Funding Information:
This study was supported by the New Energy and Industrial Technology Development Organization (NEDO) of Japan and by a Grant-in-Aid for Challenging Exploratory Research from the Japan Society for the Promotion of Science (T.W.).
Publisher Copyright:
© 2017 American Chemical Society.
PY - 2017/11/2
Y1 - 2017/11/2
N2 - 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.
AB - 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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U2 - 10.1021/acs.jpclett.7b02525
DO - 10.1021/acs.jpclett.7b02525
M3 - Article
C2 - 29045146
AN - SCOPUS:85032796777
SN - 1948-7185
VL - 8
SP - 5360
EP - 5365
JO - Journal of Physical Chemistry Letters
JF - Journal of Physical Chemistry Letters
IS - 21
ER -