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

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

61 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

Bibliographical note

Publisher Copyright:
© 2020 Elsevier B.V.

Keywords

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

ASJC Scopus subject areas

Catalysis
General Environmental Science
Process Chemistry and Technology

Access to Document

10.1016/j.apcatb.2020.118820

Cite this

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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}",

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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

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.

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