IrCo nanocacti on CoXSynanocages as a highly efficient and robust electrocatalyst for the oxygen evolution reaction in acidic media

Jun Kim; Taehyun Kwon; Saerom Yu; So Yeon Chun; Aram Oh; Jong Min Kim; Hionsuck Baik; Hyung Chul Ham; Jin Young Kim; Kyungwon Kwak; Kwangyeol Lee

doi:10.1039/d0nr04622a

IrCo nanocacti on Co_XS_ynanocages as a highly efficient and robust electrocatalyst for the oxygen evolution reaction in acidic media

Jun Kim, Taehyun Kwon, Saerom Yu, So Yeon Chun, Aram Oh, Jong Min Kim, Hionsuck Baik, Hyung Chul Ham, Jin Young Kim, Kyungwon Kwak, Kwangyeol Lee

Department of Chemistry

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

11 Citations (Scopus)

Abstract

Developing highly efficient Ir-based electrocatalysts for the oxygen evolution reaction (OER) has been an important agenda in spearheading the water splitting technology. In this study, the synthesis of IrCo nanocacti on CoxSy nanocages (ICS NCs) is demonstrated by utilizing CoO@CoxSy nanoparticles as reactive nanotemplates. In addition to the high catalytic activities with a low overpotential of 281 mV at 10 mA cm-2 and an outstanding mass activity of 1285 mA mgIr-1 at 1.53 V, the ICS NCs endure a prolonged OER test for over 100 h, greatly outperforming other previously reported Ir-based electrocatalysts. This work suggests that the unique hetero-nanostructure of IrCo/CoxSy induces in situ S doping during electrochemical oxidation and the beneficial effect of S doping on the enhanced stability of ICS NCs for the OER.

Original language	English
Pages (from-to)	17074-17082
Number of pages	9
Journal	Nanoscale
Volume	12
Issue number	32
DOIs	https://doi.org/10.1039/d0nr04622a
Publication status	Published - 2020 Aug 28

Bibliographical note

Publisher Copyright:
© 2020 The Royal Society of Chemistry.

ASJC Scopus subject areas

General Materials Science

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

Access to Document

10.1039/d0nr04622a

Cite this

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title = "IrCo nanocacti on CoXSynanocages as a highly efficient and robust electrocatalyst for the oxygen evolution reaction in acidic media",

abstract = "Developing highly efficient Ir-based electrocatalysts for the oxygen evolution reaction (OER) has been an important agenda in spearheading the water splitting technology. In this study, the synthesis of IrCo nanocacti on CoxSy nanocages (ICS NCs) is demonstrated by utilizing CoO@CoxSy nanoparticles as reactive nanotemplates. In addition to the high catalytic activities with a low overpotential of 281 mV at 10 mA cm-2 and an outstanding mass activity of 1285 mA mgIr-1 at 1.53 V, the ICS NCs endure a prolonged OER test for over 100 h, greatly outperforming other previously reported Ir-based electrocatalysts. This work suggests that the unique hetero-nanostructure of IrCo/CoxSy induces in situ S doping during electrochemical oxidation and the beneficial effect of S doping on the enhanced stability of ICS NCs for the OER.",

author = "Jun Kim and Taehyun Kwon and Saerom Yu and Chun, {So Yeon} and Aram Oh and Kim, {Jong Min} and Hionsuck Baik and Ham, {Hyung Chul} and Kim, {Jin Young} and Kyungwon Kwak and Kwangyeol Lee",

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doi = "10.1039/d0nr04622a",

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T1 - IrCo nanocacti on CoXSynanocages as a highly efficient and robust electrocatalyst for the oxygen evolution reaction in acidic media

AU - Kim, Jun

AU - Kwon, Taehyun

AU - Yu, Saerom

AU - Chun, So Yeon

AU - Oh, Aram

AU - Kim, Jong Min

AU - Baik, Hionsuck

AU - Ham, Hyung Chul

AU - Kim, Jin Young

AU - Kwak, Kyungwon

AU - Lee, Kwangyeol

PY - 2020/8/28

Y1 - 2020/8/28

N2 - Developing highly efficient Ir-based electrocatalysts for the oxygen evolution reaction (OER) has been an important agenda in spearheading the water splitting technology. In this study, the synthesis of IrCo nanocacti on CoxSy nanocages (ICS NCs) is demonstrated by utilizing CoO@CoxSy nanoparticles as reactive nanotemplates. In addition to the high catalytic activities with a low overpotential of 281 mV at 10 mA cm-2 and an outstanding mass activity of 1285 mA mgIr-1 at 1.53 V, the ICS NCs endure a prolonged OER test for over 100 h, greatly outperforming other previously reported Ir-based electrocatalysts. This work suggests that the unique hetero-nanostructure of IrCo/CoxSy induces in situ S doping during electrochemical oxidation and the beneficial effect of S doping on the enhanced stability of ICS NCs for the OER.

AB - Developing highly efficient Ir-based electrocatalysts for the oxygen evolution reaction (OER) has been an important agenda in spearheading the water splitting technology. In this study, the synthesis of IrCo nanocacti on CoxSy nanocages (ICS NCs) is demonstrated by utilizing CoO@CoxSy nanoparticles as reactive nanotemplates. In addition to the high catalytic activities with a low overpotential of 281 mV at 10 mA cm-2 and an outstanding mass activity of 1285 mA mgIr-1 at 1.53 V, the ICS NCs endure a prolonged OER test for over 100 h, greatly outperforming other previously reported Ir-based electrocatalysts. This work suggests that the unique hetero-nanostructure of IrCo/CoxSy induces in situ S doping during electrochemical oxidation and the beneficial effect of S doping on the enhanced stability of ICS NCs for the OER.

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