Activity-stability relationship in Au@Pt nanoparticles for electrocatalysis

Dong Young Chung; Subin Park; Hyeonju Lee; Hyungjun Kim; Young Hoon Chung; Ji Mun Yoo; Docheon Ahn; Seung Ho Yu; Kug Seung Lee; Mahdi Ahmadi; Huanxin Ju; Héctor D. Abruña; Sung Jong Yoo; Bongjin Simon Mun; Yung Eun Sung

doi:10.1021/acsenergylett.0c01507

Activity-stability relationship in Au@Pt nanoparticles for electrocatalysis

Dong Young Chung, Subin Park, Hyeonju Lee, Hyungjun Kim, Young Hoon Chung, Ji Mun Yoo, Docheon Ahn, Seung Ho Yu, Kug Seung Lee, Mahdi Ahmadi, Huanxin Ju, Héctor D. Abruña, Sung Jong Yoo, Bongjin Simon Mun, Yung Eun Sung

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

12 Citations (Scopus)

Abstract

Despite breakthroughs in the activity of electrocatalysts for the oxygen reduction reaction (ORR), the development of nanoscale ORR electrocatalysts is still hindered by their instability. Here, to bridge the functional link between activity and stability, well-controlled Au@Pt (core@shell) nanoparticles are investigated. In situ monitoring of atomic dissolution and physicochemical analysis in conjunction with theoretical calculations reveal that the atomic-level stability of Au@Pt nanoparticle is attributed to the low surface coverage of OH and oxide on Pt, balancing between strain and ligand effect of Au at the interface. Considering the relationships in activity-stability-oxophilicity, the functional links between activity and stability in the ORR are discussed, and the regulation of oxophilicity is suggested as a guideline for designing highly active and durable electrocatalysts for fuel cell applications.

Original language	English
Pages (from-to)	2827-2834
Number of pages	8
Journal	ACS Energy Letters
Volume	5
Issue number	9
DOIs	https://doi.org/10.1021/acsenergylett.0c01507
Publication status	Published - 2020 Sep 11

ASJC Scopus subject areas

Chemistry (miscellaneous)
Renewable Energy, Sustainability and the Environment
Fuel Technology
Energy Engineering and Power Technology
Materials Chemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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Activity-stability relationship in Au@Pt nanoparticles for electrocatalysis. / Chung, Dong Young; Park, Subin; Lee, Hyeonju; Kim, Hyungjun; Chung, Young Hoon; Yoo, Ji Mun; Ahn, Docheon; Yu, Seung Ho; Lee, Kug Seung; Ahmadi, Mahdi; Ju, Huanxin; Abruña, Héctor D.; Yoo, Sung Jong; Mun, Bongjin Simon; Sung, Yung Eun.

In: ACS Energy Letters, Vol. 5, No. 9, 11.09.2020, p. 2827-2834.

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

Chung, Dong Young ; Park, Subin ; Lee, Hyeonju ; Kim, Hyungjun ; Chung, Young Hoon ; Yoo, Ji Mun ; Ahn, Docheon ; Yu, Seung Ho ; Lee, Kug Seung ; Ahmadi, Mahdi ; Ju, Huanxin ; Abruña, Héctor D. ; Yoo, Sung Jong ; Mun, Bongjin Simon ; Sung, Yung Eun. / Activity-stability relationship in Au@Pt nanoparticles for electrocatalysis. In: ACS Energy Letters. 2020 ; Vol. 5, No. 9. pp. 2827-2834.

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title = "Activity-stability relationship in Au@Pt nanoparticles for electrocatalysis",

abstract = "Despite breakthroughs in the activity of electrocatalysts for the oxygen reduction reaction (ORR), the development of nanoscale ORR electrocatalysts is still hindered by their instability. Here, to bridge the functional link between activity and stability, well-controlled Au@Pt (core@shell) nanoparticles are investigated. In situ monitoring of atomic dissolution and physicochemical analysis in conjunction with theoretical calculations reveal that the atomic-level stability of Au@Pt nanoparticle is attributed to the low surface coverage of OH and oxide on Pt, balancing between strain and ligand effect of Au at the interface. Considering the relationships in activity-stability-oxophilicity, the functional links between activity and stability in the ORR are discussed, and the regulation of oxophilicity is suggested as a guideline for designing highly active and durable electrocatalysts for fuel cell applications.",

author = "Chung, {Dong Young} and Subin Park and Hyeonju Lee and Hyungjun Kim and Chung, {Young Hoon} and Yoo, {Ji Mun} and Docheon Ahn and Yu, {Seung Ho} and Lee, {Kug Seung} and Mahdi Ahmadi and Huanxin Ju and Abru{\~n}a, {H{\'e}ctor D.} and Yoo, {Sung Jong} and Mun, {Bongjin Simon} and Sung, {Yung Eun}",

note = "Funding Information: Y.-E.S. acknowledges the support from Institute for Basic Science (IBS-R006-A2). S.J.Y. acknowledges the support from the Global Frontier R&D Program on Center for Multiscale Energy System funded by NRF under the Ministry of Science and ICT, Republic of Korea (2016M3A6A7945505) and supported by NRF of Korea grant (2018M1A2A2061975, 2019R1A2B5B03004854). B.S.M. acknowledges support from the National Research Foundation of Korea (NRF-2015R1A5A1009962 and NRF-2019R1A2C2008052) and the GIST Research Institute Grant funded by the Gwangju Institute of Science and Technology (GIST) 2020. Publisher Copyright: Copyright {\textcopyright} 2020 American Chemical Society.",

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AU - Ahn, Docheon

AU - Yu, Seung Ho

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AU - Ahmadi, Mahdi

AU - Ju, Huanxin

AU - Abruña, Héctor D.

AU - Yoo, Sung Jong

AU - Mun, Bongjin Simon

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N1 - Funding Information: Y.-E.S. acknowledges the support from Institute for Basic Science (IBS-R006-A2). S.J.Y. acknowledges the support from the Global Frontier R&D Program on Center for Multiscale Energy System funded by NRF under the Ministry of Science and ICT, Republic of Korea (2016M3A6A7945505) and supported by NRF of Korea grant (2018M1A2A2061975, 2019R1A2B5B03004854). B.S.M. acknowledges support from the National Research Foundation of Korea (NRF-2015R1A5A1009962 and NRF-2019R1A2C2008052) and the GIST Research Institute Grant funded by the Gwangju Institute of Science and Technology (GIST) 2020. Publisher Copyright: Copyright © 2020 American Chemical Society.

PY - 2020/9/11

Y1 - 2020/9/11

N2 - Despite breakthroughs in the activity of electrocatalysts for the oxygen reduction reaction (ORR), the development of nanoscale ORR electrocatalysts is still hindered by their instability. Here, to bridge the functional link between activity and stability, well-controlled Au@Pt (core@shell) nanoparticles are investigated. In situ monitoring of atomic dissolution and physicochemical analysis in conjunction with theoretical calculations reveal that the atomic-level stability of Au@Pt nanoparticle is attributed to the low surface coverage of OH and oxide on Pt, balancing between strain and ligand effect of Au at the interface. Considering the relationships in activity-stability-oxophilicity, the functional links between activity and stability in the ORR are discussed, and the regulation of oxophilicity is suggested as a guideline for designing highly active and durable electrocatalysts for fuel cell applications.

AB - Despite breakthroughs in the activity of electrocatalysts for the oxygen reduction reaction (ORR), the development of nanoscale ORR electrocatalysts is still hindered by their instability. Here, to bridge the functional link between activity and stability, well-controlled Au@Pt (core@shell) nanoparticles are investigated. In situ monitoring of atomic dissolution and physicochemical analysis in conjunction with theoretical calculations reveal that the atomic-level stability of Au@Pt nanoparticle is attributed to the low surface coverage of OH and oxide on Pt, balancing between strain and ligand effect of Au at the interface. Considering the relationships in activity-stability-oxophilicity, the functional links between activity and stability in the ORR are discussed, and the regulation of oxophilicity is suggested as a guideline for designing highly active and durable electrocatalysts for fuel cell applications.

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Activity-stability relationship in Au@Pt nanoparticles for electrocatalysis

Abstract

ASJC Scopus subject areas

UN SDGs

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