Carbon-Supported IrCoOx nanoparticles as an efficient and stable OER electrocatalyst for practicable CO2 electrolysis

Woong Hee Lee; Hong Nhan Nong; Chang Hyuck Choi; Keun Hwa Chae; Yun Jeong Hwang; Byoung Koun Min; Peter Strasser; Hyung Suk Oh

doi:10.1016/j.apcatb.2020.118820

Carbon-Supported IrCoO_x nanoparticles as an efficient and stable OER electrocatalyst for practicable CO₂ electrolysis

Woong Hee Lee, Hong Nhan Nong, Chang Hyuck Choi, Keun Hwa Chae, Yun Jeong Hwang, Byoung Koun Min, Peter Strasser, Hyung Suk Oh

GREEN SCHOOL (Graduate School of Energy and Environment)

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

44 Citations (Scopus)

Abstract

The development of an efficient and stable oxygen evolution reaction (OER) electrocatalyst operating under pH-neutral conditions is vital for the realization of sustainable CO₂ reduction reaction (CO₂RR) systems in the future. For commercializing this system, it is also important to be able to use general-purpose water as an electrolyte. Here, we explore, characterize and validate a new IrCoO_x mixed metal oxide as efficient and stable OER catalyst, before we investigate and proof its suitability as counter electrode to a CO₂RR cathode operating under pH-neutral conditions. More specifically, carbon-supported IrCoO_x core-shell nanoparticles exhibited a highly efficient OER catalytic activity and stability compared to state-of-art reference IrO_x catalysts in CO₂-saturated 0.5 M KHCO₃ tap-water. IrCoO_x/C also exhibited a significantly improved electrochemical oxidation and corrosion resistance than IrO_x, resulting in a beneficial suppression of Ir dissolution. The application of IrCoO_x/C in the CO₂ electrolyzer displayed superior CO space-time yields over prolonged electrolyzer tests.

Original language	English
Article number	118820
Journal	Applied Catalysis B: Environmental
Volume	269
DOIs	https://doi.org/10.1016/j.apcatb.2020.118820
Publication status	Published - 2020 Jul 15

Keywords

COreduction reaction (CORR)
Iridium–cobalt
Neutral condition
Tap water
Water oxidation

ASJC Scopus subject areas

Catalysis
Environmental Science(all)
Process Chemistry and Technology

Access to Document

10.1016/j.apcatb.2020.118820

Cite this

@article{57fd2d16f3f545ab98548074b55309c2,

title = "Carbon-Supported IrCoOx nanoparticles as an efficient and stable OER electrocatalyst for practicable CO2 electrolysis",

abstract = "The development of an efficient and stable oxygen evolution reaction (OER) electrocatalyst operating under pH-neutral conditions is vital for the realization of sustainable CO2 reduction reaction (CO2RR) systems in the future. For commercializing this system, it is also important to be able to use general-purpose water as an electrolyte. Here, we explore, characterize and validate a new IrCoOx mixed metal oxide as efficient and stable OER catalyst, before we investigate and proof its suitability as counter electrode to a CO2RR cathode operating under pH-neutral conditions. More specifically, carbon-supported IrCoOx core-shell nanoparticles exhibited a highly efficient OER catalytic activity and stability compared to state-of-art reference IrOx catalysts in CO2-saturated 0.5 M KHCO3 tap-water. IrCoOx/C also exhibited a significantly improved electrochemical oxidation and corrosion resistance than IrOx, resulting in a beneficial suppression of Ir dissolution. The application of IrCoOx/C in the CO2 electrolyzer displayed superior CO space-time yields over prolonged electrolyzer tests.",

keywords = "COreduction reaction (CORR), Iridium–cobalt, Neutral condition, Tap water, Water oxidation",

author = "Lee, {Woong Hee} and Nong, {Hong Nhan} and Choi, {Chang Hyuck} and Chae, {Keun Hwa} and Hwang, {Yun Jeong} and Min, {Byoung Koun} and Peter Strasser and Oh, {Hyung Suk}",

note = "Funding Information: This work was supported by the Korea Institute of Science and Technology (KIST) institutional program and supported by “Next Generation Carbon Upcycling Project” (Project No. 2017M1A2A2046713 ) through the National Research Foundation (NRF) funded by the Ministry of Science and ICT, Republic of Korea . We acknowledge Advanced Analysis Center at KIST for the TEM, XPS and ICP-MS measurements. We wish to thank 1D XRS KIST-PAL beamline for measuring the XAS. P.S. acknowledges partial financial support by the German National Sceince Foundation (Deutsche Forschungsgemeinschaft) through grant STR 596/12-1 ({"}Iridium support interaction{"}). Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2020",

month = jul,

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doi = "10.1016/j.apcatb.2020.118820",

language = "English",

volume = "269",

journal = "Applied Catalysis B: Environmental",

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TY - JOUR

T1 - Carbon-Supported IrCoOx nanoparticles as an efficient and stable OER electrocatalyst for practicable CO2 electrolysis

AU - Lee, Woong Hee

AU - Nong, Hong Nhan

AU - Choi, Chang Hyuck

AU - Chae, Keun Hwa

AU - Hwang, Yun Jeong

AU - Min, Byoung Koun

AU - Strasser, Peter

AU - Oh, Hyung Suk

N1 - Funding Information: This work was supported by the Korea Institute of Science and Technology (KIST) institutional program and supported by “Next Generation Carbon Upcycling Project” (Project No. 2017M1A2A2046713 ) through the National Research Foundation (NRF) funded by the Ministry of Science and ICT, Republic of Korea . We acknowledge Advanced Analysis Center at KIST for the TEM, XPS and ICP-MS measurements. We wish to thank 1D XRS KIST-PAL beamline for measuring the XAS. P.S. acknowledges partial financial support by the German National Sceince Foundation (Deutsche Forschungsgemeinschaft) through grant STR 596/12-1 ("Iridium support interaction"). Publisher Copyright: © 2020 Elsevier B.V.

PY - 2020/7/15

Y1 - 2020/7/15

N2 - The development of an efficient and stable oxygen evolution reaction (OER) electrocatalyst operating under pH-neutral conditions is vital for the realization of sustainable CO2 reduction reaction (CO2RR) systems in the future. For commercializing this system, it is also important to be able to use general-purpose water as an electrolyte. Here, we explore, characterize and validate a new IrCoOx mixed metal oxide as efficient and stable OER catalyst, before we investigate and proof its suitability as counter electrode to a CO2RR cathode operating under pH-neutral conditions. More specifically, carbon-supported IrCoOx core-shell nanoparticles exhibited a highly efficient OER catalytic activity and stability compared to state-of-art reference IrOx catalysts in CO2-saturated 0.5 M KHCO3 tap-water. IrCoOx/C also exhibited a significantly improved electrochemical oxidation and corrosion resistance than IrOx, resulting in a beneficial suppression of Ir dissolution. The application of IrCoOx/C in the CO2 electrolyzer displayed superior CO space-time yields over prolonged electrolyzer tests.

AB - The development of an efficient and stable oxygen evolution reaction (OER) electrocatalyst operating under pH-neutral conditions is vital for the realization of sustainable CO2 reduction reaction (CO2RR) systems in the future. For commercializing this system, it is also important to be able to use general-purpose water as an electrolyte. Here, we explore, characterize and validate a new IrCoOx mixed metal oxide as efficient and stable OER catalyst, before we investigate and proof its suitability as counter electrode to a CO2RR cathode operating under pH-neutral conditions. More specifically, carbon-supported IrCoOx core-shell nanoparticles exhibited a highly efficient OER catalytic activity and stability compared to state-of-art reference IrOx catalysts in CO2-saturated 0.5 M KHCO3 tap-water. IrCoOx/C also exhibited a significantly improved electrochemical oxidation and corrosion resistance than IrOx, resulting in a beneficial suppression of Ir dissolution. The application of IrCoOx/C in the CO2 electrolyzer displayed superior CO space-time yields over prolonged electrolyzer tests.

KW - COreduction reaction (CORR)

KW - Iridium–cobalt

KW - Neutral condition

KW - Tap water

KW - Water oxidation

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DO - 10.1016/j.apcatb.2020.118820

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