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

研究成果: Article › 査読

7 被引用数 (Scopus)

抄録

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.

本文言語	English
ページ（範囲）	4597-4601
ページ数	5
ジャーナル	ACS Applied Energy Materials
巻	2
号	7
DOI	https://doi.org/10.1021/acsaem.9b00873
出版ステータス	Published - 2019 7月 22
外部発表	はい

ASJC Scopus subject areas

化学工学（その他）
エネルギー工学および電力技術
電気化学
材料化学
電子工学および電気工学

文献へのアクセス

10.1021/acsaem.9b00873

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引用スタイル

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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",

year = "2019",

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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

PY - 2019/7/22

Y1 - 2019/7/22

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.

KW - arc-plasma deposition

KW - cross-sectional STEM

KW - in-plane XRD

KW - oxygen reduction reaction

KW - Pt-shell

KW - Pt-Zr surface alloy

KW - stacking fault

KW - tensile strain

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