Ligand-Effect-Induced Oxygen Reduction Reaction Activity Enhancement for Pt/Zr/Pt(111) Surfaces with Tensile Strain Relieved by Stacking Faults

Daisuke Kudo; Soma Kaneko; Rikiya Myochi; Yoshihiro Chida; Naoto Todoroki; Tadao Tanabe; Toshimasa Wadayama

doi:10.1021/acsaem.9b00873

Ligand-Effect-Induced Oxygen Reduction Reaction Activity Enhancement for Pt/Zr/Pt(111) Surfaces with Tensile Strain Relieved by Stacking Faults

Daisuke Kudo, Soma Kaneko, Rikiya Myochi, Yoshihiro Chida, Naoto Todoroki, Tadao Tanabe, Toshimasa Wadayama

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

Oxygen reduction reaction (ORR) properties are investigated for the Pt/Zr/Pt(111) surfaces prepared through arc-plasma depositions of Zr and Pt on a Pt(111) substrate. The synthesized Pt(111)-shell surfaces on Pt-Zr(111) alloy layers exhibited 3- to 5-fold higher ORR activities than the clean Pt(111): the ligand effect induced by charge transfers between Pt and Zr was considered to be the dominant activity enhancement factor, because tensile strains in the Pt-shell were relieved by the stacking faults generated in the underlaid Pt-Zr alloy layers. Furthermore, the alloy surfaces are durable against an electrochemical potential cycling. The results demonstrate that Zr should be considered for alloying elements of Pt for developments of effective ORR catalysts.

Original language	English
Pages (from-to)	4597-4601
Number of pages	5
Journal	ACS Applied Energy Materials
Volume	2
Issue number	7
DOIs	https://doi.org/10.1021/acsaem.9b00873
Publication status	Published - 2019 Jul 22
Externally published	Yes

Keywords

arc-plasma deposition
cross-sectional STEM
in-plane XRD
oxygen reduction reaction
Pt-shell
Pt-Zr surface alloy
stacking fault
tensile strain

ASJC Scopus subject areas

Chemical Engineering (miscellaneous)
Energy Engineering and Power Technology
Electrochemistry
Materials Chemistry
Electrical and Electronic Engineering

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10.1021/acsaem.9b00873

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Ligand-Effect-Induced Oxygen Reduction Reaction Activity Enhancement for Pt/Zr/Pt(111) Surfaces with Tensile Strain Relieved by Stacking Faults. / Kudo, Daisuke; Kaneko, Soma; Myochi, Rikiya; Chida, Yoshihiro; Todoroki, Naoto; Tanabe, Tadao; Wadayama, Toshimasa.

In: ACS Applied Energy Materials, Vol. 2, No. 7, 22.07.2019, p. 4597-4601.

Research output: Contribution to journal › Article › peer-review

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title = "Ligand-Effect-Induced Oxygen Reduction Reaction Activity Enhancement for Pt/Zr/Pt(111) Surfaces with Tensile Strain Relieved by Stacking Faults",

abstract = "Oxygen reduction reaction (ORR) properties are investigated for the Pt/Zr/Pt(111) surfaces prepared through arc-plasma depositions of Zr and Pt on a Pt(111) substrate. The synthesized Pt(111)-shell surfaces on Pt-Zr(111) alloy layers exhibited 3- to 5-fold higher ORR activities than the clean Pt(111): the ligand effect induced by charge transfers between Pt and Zr was considered to be the dominant activity enhancement factor, because tensile strains in the Pt-shell were relieved by the stacking faults generated in the underlaid Pt-Zr alloy layers. Furthermore, the alloy surfaces are durable against an electrochemical potential cycling. The results demonstrate that Zr should be considered for alloying elements of Pt for developments of effective ORR catalysts.",

keywords = "arc-plasma deposition, cross-sectional STEM, in-plane XRD, oxygen reduction reaction, Pt-shell, Pt-Zr surface alloy, stacking fault, tensile strain",

author = "Daisuke Kudo and Soma Kaneko and Rikiya Myochi and Yoshihiro Chida and Naoto Todoroki and Tadao Tanabe and Toshimasa Wadayama",

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AU - Kudo, Daisuke

AU - Kaneko, Soma

AU - Myochi, Rikiya

AU - Chida, Yoshihiro

AU - Todoroki, Naoto

AU - Tanabe, Tadao

AU - Wadayama, Toshimasa

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N2 - Oxygen reduction reaction (ORR) properties are investigated for the Pt/Zr/Pt(111) surfaces prepared through arc-plasma depositions of Zr and Pt on a Pt(111) substrate. The synthesized Pt(111)-shell surfaces on Pt-Zr(111) alloy layers exhibited 3- to 5-fold higher ORR activities than the clean Pt(111): the ligand effect induced by charge transfers between Pt and Zr was considered to be the dominant activity enhancement factor, because tensile strains in the Pt-shell were relieved by the stacking faults generated in the underlaid Pt-Zr alloy layers. Furthermore, the alloy surfaces are durable against an electrochemical potential cycling. The results demonstrate that Zr should be considered for alloying elements of Pt for developments of effective ORR catalysts.

AB - Oxygen reduction reaction (ORR) properties are investigated for the Pt/Zr/Pt(111) surfaces prepared through arc-plasma depositions of Zr and Pt on a Pt(111) substrate. The synthesized Pt(111)-shell surfaces on Pt-Zr(111) alloy layers exhibited 3- to 5-fold higher ORR activities than the clean Pt(111): the ligand effect induced by charge transfers between Pt and Zr was considered to be the dominant activity enhancement factor, because tensile strains in the Pt-shell were relieved by the stacking faults generated in the underlaid Pt-Zr alloy layers. Furthermore, the alloy surfaces are durable against an electrochemical potential cycling. The results demonstrate that Zr should be considered for alloying elements of Pt for developments of effective ORR catalysts.

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