Intermetallic PtCu Nanoframes as Efficient Oxygen Reduction Electrocatalysts

Ho Young Kim; Taehyun Kwon; Yoonhoo Ha; Minki Jun; Hionsuck Baik; Hu Young Jeong; Hyungjun Kim; Kwangyeol Lee; Sang Hoon Joo

doi:10.1021/acs.nanolett.0c02812

Intermetallic PtCu Nanoframes as Efficient Oxygen Reduction Electrocatalysts

Ho Young Kim
, Taehyun Kwon
, Yoonhoo Ha
, Minki Jun
, Hionsuck Baik
, Hu Young Jeong
, Hyungjun Kim^*
, Kwangyeol Lee^*
, Sang Hoon Joo^*

^*Corresponding author for this work

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

164 Citations (Scopus)

Abstract

Nanoframe alloy structures represent a class of high-performance catalysts for the oxygen reduction reaction (ORR), owing to their high active surface area, efficient molecular accessibility, and nanoconfinement effect. However, structural and chemical instabilities of nanoframes remain an important challenge. Here, we report the synthesis of PtCu nanoframes constructed with an atomically ordered intermetallic structure (O-PtCuNF/C) showing high ORR activity, durability, and chemical stability. We rationally designed the O-PtCuNF/C catalyst by combining theoretical composition predictions with a silica-coating-mediated synthesis. The O-PtCuNF/C combines intensified strain and ligand effects from the intermetallic PtCu L11 structure and advantages of the nanoframes, resulting in superior ORR activity to disordered alloy PtCu nanoframes (D-PtCuNF/C) and commercial Pt/C catalysts. Importantly, the O-PtCuNF/C showed the highest ORR mass activity among PtCu-based catalysts. Furthermore, the O-PtCuNF/C exhibited higher ORR durability and far less etching of constituent atoms than D-PtCuNF/C and Pt/C, attesting to the chemically stable nature of the intermetallic structure.

Original language	English
Pages (from-to)	7413-7421
Number of pages	9
Journal	Nano Letters
Volume	20
Issue number	10
DOIs	https://doi.org/10.1021/acs.nanolett.0c02812
Publication status	Published - 2020 Oct 14

Bibliographical note

Funding Information:
This paper is dedicated to Prof. Ryong Ryoo on the occasion of his 65th birthday. This work was supported by the National Research Foundation (NRF) of Korea funded by the Ministry of Science and ICT (NRF-2015M1A2A2056560, NRF-2019M3E6A1064521, NRF-2019M3D1A1079306 and NRF-2019M1A2A2065614). T.K., M.J., and K.L. were supported by the NRF of Korea (NRF-2020R1A2B5B03002475). Y.H. and H.K. acknowledge the support by the NRF of Korea (NRF-2017M1A2A2092564). We also thank Korea Basic Science Institute (KBSI) for allowing the usage of their HRTEM instruments.

Funding Information:
This paper is dedicated to Prof. Ryong Ryoo on the occasion of his 65th birthday. This work was supported by the National Research Foundation (NRF) of Korea funded by the Ministry of Science and ICT (NRF-2015M1A2A2056560, NRF-2019M3E6A1064521, NRF-2019M3D1A1079306, and NRF-2019M1A2A2065614). T.K., M.J., and K.L. were supported by the NRF of Korea (NRF-2020R1A2B5B03002475). Y.H. and H.K. acknowledge the support by the NRF of Korea (NRF-2017M1A2A2092564). We also thank Korea Basic Science Institute (KBSI) for allowing the usage of their HRTEM instruments.

Publisher Copyright:
Copyright © 2020 American Chemical Society.

Keywords

electrocatalyst
intermetallic
nanoframe
oxygen reduction reaction

ASJC Scopus subject areas

Bioengineering
General Chemistry
General Materials Science
Condensed Matter Physics
Mechanical Engineering

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10.1021/acs.nanolett.0c02812

Cite this

@article{1b0280353cd24169bebe53df8787f67d,

title = "Intermetallic PtCu Nanoframes as Efficient Oxygen Reduction Electrocatalysts",

abstract = "Nanoframe alloy structures represent a class of high-performance catalysts for the oxygen reduction reaction (ORR), owing to their high active surface area, efficient molecular accessibility, and nanoconfinement effect. However, structural and chemical instabilities of nanoframes remain an important challenge. Here, we report the synthesis of PtCu nanoframes constructed with an atomically ordered intermetallic structure (O-PtCuNF/C) showing high ORR activity, durability, and chemical stability. We rationally designed the O-PtCuNF/C catalyst by combining theoretical composition predictions with a silica-coating-mediated synthesis. The O-PtCuNF/C combines intensified strain and ligand effects from the intermetallic PtCu L11 structure and advantages of the nanoframes, resulting in superior ORR activity to disordered alloy PtCu nanoframes (D-PtCuNF/C) and commercial Pt/C catalysts. Importantly, the O-PtCuNF/C showed the highest ORR mass activity among PtCu-based catalysts. Furthermore, the O-PtCuNF/C exhibited higher ORR durability and far less etching of constituent atoms than D-PtCuNF/C and Pt/C, attesting to the chemically stable nature of the intermetallic structure.",

keywords = "electrocatalyst, intermetallic, nanoframe, oxygen reduction reaction",

author = "Kim, \{Ho Young\} and Taehyun Kwon and Yoonhoo Ha and Minki Jun and Hionsuck Baik and Jeong, \{Hu Young\} and Hyungjun Kim and Kwangyeol Lee and Joo, \{Sang Hoon\}",

note = "Funding Information: This paper is dedicated to Prof. Ryong Ryoo on the occasion of his 65th birthday. This work was supported by the National Research Foundation (NRF) of Korea funded by the Ministry of Science and ICT (NRF-2015M1A2A2056560, NRF-2019M3E6A1064521, NRF-2019M3D1A1079306 and NRF-2019M1A2A2065614). T.K., M.J., and K.L. were supported by the NRF of Korea (NRF-2020R1A2B5B03002475). Y.H. and H.K. acknowledge the support by the NRF of Korea (NRF-2017M1A2A2092564). We also thank Korea Basic Science Institute (KBSI) for allowing the usage of their HRTEM instruments. Funding Information: This paper is dedicated to Prof. Ryong Ryoo on the occasion of his 65th birthday. This work was supported by the National Research Foundation (NRF) of Korea funded by the Ministry of Science and ICT (NRF-2015M1A2A2056560, NRF-2019M3E6A1064521, NRF-2019M3D1A1079306, and NRF-2019M1A2A2065614). T.K., M.J., and K.L. were supported by the NRF of Korea (NRF-2020R1A2B5B03002475). Y.H. and H.K. acknowledge the support by the NRF of Korea (NRF-2017M1A2A2092564). We also thank Korea Basic Science Institute (KBSI) for allowing the usage of their HRTEM instruments. Publisher Copyright: Copyright {\textcopyright} 2020 American Chemical Society.",

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AU - Kwon, Taehyun

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AU - Baik, Hionsuck

AU - Jeong, Hu Young

AU - Kim, Hyungjun

AU - Lee, Kwangyeol

AU - Joo, Sang Hoon

N1 - Funding Information: This paper is dedicated to Prof. Ryong Ryoo on the occasion of his 65th birthday. This work was supported by the National Research Foundation (NRF) of Korea funded by the Ministry of Science and ICT (NRF-2015M1A2A2056560, NRF-2019M3E6A1064521, NRF-2019M3D1A1079306 and NRF-2019M1A2A2065614). T.K., M.J., and K.L. were supported by the NRF of Korea (NRF-2020R1A2B5B03002475). Y.H. and H.K. acknowledge the support by the NRF of Korea (NRF-2017M1A2A2092564). We also thank Korea Basic Science Institute (KBSI) for allowing the usage of their HRTEM instruments. Funding Information: This paper is dedicated to Prof. Ryong Ryoo on the occasion of his 65th birthday. This work was supported by the National Research Foundation (NRF) of Korea funded by the Ministry of Science and ICT (NRF-2015M1A2A2056560, NRF-2019M3E6A1064521, NRF-2019M3D1A1079306, and NRF-2019M1A2A2065614). T.K., M.J., and K.L. were supported by the NRF of Korea (NRF-2020R1A2B5B03002475). Y.H. and H.K. acknowledge the support by the NRF of Korea (NRF-2017M1A2A2092564). We also thank Korea Basic Science Institute (KBSI) for allowing the usage of their HRTEM instruments. Publisher Copyright: Copyright © 2020 American Chemical Society.

PY - 2020/10/14

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N2 - Nanoframe alloy structures represent a class of high-performance catalysts for the oxygen reduction reaction (ORR), owing to their high active surface area, efficient molecular accessibility, and nanoconfinement effect. However, structural and chemical instabilities of nanoframes remain an important challenge. Here, we report the synthesis of PtCu nanoframes constructed with an atomically ordered intermetallic structure (O-PtCuNF/C) showing high ORR activity, durability, and chemical stability. We rationally designed the O-PtCuNF/C catalyst by combining theoretical composition predictions with a silica-coating-mediated synthesis. The O-PtCuNF/C combines intensified strain and ligand effects from the intermetallic PtCu L11 structure and advantages of the nanoframes, resulting in superior ORR activity to disordered alloy PtCu nanoframes (D-PtCuNF/C) and commercial Pt/C catalysts. Importantly, the O-PtCuNF/C showed the highest ORR mass activity among PtCu-based catalysts. Furthermore, the O-PtCuNF/C exhibited higher ORR durability and far less etching of constituent atoms than D-PtCuNF/C and Pt/C, attesting to the chemically stable nature of the intermetallic structure.

AB - Nanoframe alloy structures represent a class of high-performance catalysts for the oxygen reduction reaction (ORR), owing to their high active surface area, efficient molecular accessibility, and nanoconfinement effect. However, structural and chemical instabilities of nanoframes remain an important challenge. Here, we report the synthesis of PtCu nanoframes constructed with an atomically ordered intermetallic structure (O-PtCuNF/C) showing high ORR activity, durability, and chemical stability. We rationally designed the O-PtCuNF/C catalyst by combining theoretical composition predictions with a silica-coating-mediated synthesis. The O-PtCuNF/C combines intensified strain and ligand effects from the intermetallic PtCu L11 structure and advantages of the nanoframes, resulting in superior ORR activity to disordered alloy PtCu nanoframes (D-PtCuNF/C) and commercial Pt/C catalysts. Importantly, the O-PtCuNF/C showed the highest ORR mass activity among PtCu-based catalysts. Furthermore, the O-PtCuNF/C exhibited higher ORR durability and far less etching of constituent atoms than D-PtCuNF/C and Pt/C, attesting to the chemically stable nature of the intermetallic structure.

KW - electrocatalyst

KW - intermetallic

KW - nanoframe

KW - oxygen reduction reaction

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M3 - Article

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SN - 1530-6984

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EP - 7421

JO - Nano Letters

JF - Nano Letters

IS - 10

ER -

Intermetallic PtCu Nanoframes as Efficient Oxygen Reduction Electrocatalysts

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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