Interfacing RuO2with Pt to induce efficient charge transfer from Pt to RuO2for highly efficient and stable oxygen evolution in acidic media

Taehyun Kwon; Heesu Yang; Minki Jun; Taekyung Kim; Jinwhan Joo; Jun Kim; Hionsuck Baik; Jin Young Kim; Kwangyeol Lee

doi:10.1039/d1ta01587g

Interfacing RuO₂with Pt to induce efficient charge transfer from Pt to RuO₂for highly efficient and stable oxygen evolution in acidic media

Taehyun Kwon, Heesu Yang, Minki Jun, Taekyung Kim, Jinwhan Joo, Jun Kim, Hionsuck Baik, Jin Young Kim, Kwangyeol Lee

Department of Chemistry

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

31 Citations (Scopus)

Abstract

The oxygen evolution reaction (OER) requires a large overpotential which undermines the stability of electrocatalysts, typically IrO_xor RuO_x. RuO_xis particularly vulnerable to high overpotential in acidic media, due to the formation of soluble species, thus making it nearly impossible to be used as a commercially viable OER electrocatalyst. Herein, we demonstrate that the charge transfer from Pt to conjoined RuO₂dramatically stabilizes the RuO₂phase against overoxidation, the main culprit of disintegration of RuO₂. In this work, we compared the OER performance of three different types of Au@Pt@RuO_xnanowires, namely, hetero-interfaced, gradient-alloy, and conformal-shell type, with varying degrees of interaction between Pt and RuO₂. Among the studied samples, the hetero-interfaced type exhibited the highest OER mass activity of 1.311 A mg_Ru⁻¹at 1.48

Original language	English
Pages (from-to)	14352-14362
Number of pages	11
Journal	Journal of Materials Chemistry A
Volume	9
Issue number	25
DOIs	https://doi.org/10.1039/d1ta01587g
Publication status	Published - 2021 Jul 7

Bibliographical note

Publisher Copyright:
© The Royal Society of Chemistry 2021.

ASJC Scopus subject areas

General Chemistry
Renewable Energy, Sustainability and the Environment
General Materials Science

UN SDGs

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

Access to Document

10.1039/d1ta01587g

Cite this

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title = "Interfacing RuO2with Pt to induce efficient charge transfer from Pt to RuO2for highly efficient and stable oxygen evolution in acidic media",

abstract = "The oxygen evolution reaction (OER) requires a large overpotential which undermines the stability of electrocatalysts, typically IrOxor RuOx. RuOxis particularly vulnerable to high overpotential in acidic media, due to the formation of soluble species, thus making it nearly impossible to be used as a commercially viable OER electrocatalyst. Herein, we demonstrate that the charge transfer from Pt to conjoined RuO2dramatically stabilizes the RuO2phase against overoxidation, the main culprit of disintegration of RuO2. In this work, we compared the OER performance of three different types of Au@Pt@RuOxnanowires, namely, hetero-interfaced, gradient-alloy, and conformal-shell type, with varying degrees of interaction between Pt and RuO2. Among the studied samples, the hetero-interfaced type exhibited the highest OER mass activity of 1.311 A mgRu−1at 1.48",

author = "Taehyun Kwon and Heesu Yang and Minki Jun and Taekyung Kim and Jinwhan Joo and Jun Kim and Hionsuck Baik and Kim, {Jin Young} and Kwangyeol Lee",

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doi = "10.1039/d1ta01587g",

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T1 - Interfacing RuO2with Pt to induce efficient charge transfer from Pt to RuO2for highly efficient and stable oxygen evolution in acidic media

AU - Kwon, Taehyun

AU - Yang, Heesu

AU - Jun, Minki

AU - Kim, Taekyung

AU - Joo, Jinwhan

AU - Kim, Jun

AU - Baik, Hionsuck

AU - Kim, Jin Young

AU - Lee, Kwangyeol

PY - 2021/7/7

Y1 - 2021/7/7

N2 - The oxygen evolution reaction (OER) requires a large overpotential which undermines the stability of electrocatalysts, typically IrOxor RuOx. RuOxis particularly vulnerable to high overpotential in acidic media, due to the formation of soluble species, thus making it nearly impossible to be used as a commercially viable OER electrocatalyst. Herein, we demonstrate that the charge transfer from Pt to conjoined RuO2dramatically stabilizes the RuO2phase against overoxidation, the main culprit of disintegration of RuO2. In this work, we compared the OER performance of three different types of Au@Pt@RuOxnanowires, namely, hetero-interfaced, gradient-alloy, and conformal-shell type, with varying degrees of interaction between Pt and RuO2. Among the studied samples, the hetero-interfaced type exhibited the highest OER mass activity of 1.311 A mgRu−1at 1.48

AB - The oxygen evolution reaction (OER) requires a large overpotential which undermines the stability of electrocatalysts, typically IrOxor RuOx. RuOxis particularly vulnerable to high overpotential in acidic media, due to the formation of soluble species, thus making it nearly impossible to be used as a commercially viable OER electrocatalyst. Herein, we demonstrate that the charge transfer from Pt to conjoined RuO2dramatically stabilizes the RuO2phase against overoxidation, the main culprit of disintegration of RuO2. In this work, we compared the OER performance of three different types of Au@Pt@RuOxnanowires, namely, hetero-interfaced, gradient-alloy, and conformal-shell type, with varying degrees of interaction between Pt and RuO2. Among the studied samples, the hetero-interfaced type exhibited the highest OER mass activity of 1.311 A mgRu−1at 1.48

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