Mn5O8 Nanoparticles as Efficient Water Oxidation Catalysts at Neutral pH

Donghyuk Jeong; Kyoungsuk Jin; Sung Eun Jerng; Hongmin Seo; Donghun Kim; Seung Hoon Nahm; Sun Hee Kim; Ki Tae Nam

doi:10.1021/acscatal.5b01269

Mn₅O₈ Nanoparticles as Efficient Water Oxidation Catalysts at Neutral pH

Donghyuk Jeong, Kyoungsuk Jin, Sung Eun Jerng, Hongmin Seo, Donghun Kim, Seung Hoon Nahm, Sun Hee Kim, Ki Tae Nam

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

96 Citations (Scopus)

Abstract

Mn₅O₈ nanoparticles (NPs) were obtained via the controlled oxidation of MnO NPs. The oxygen evolution reaction (OER) properties of Mn₅O₈ NPs were evaluated using cyclic voltammetry (CV). A current density of 5 mA/cm² was reached when 580 mV of overpotential was applied at pH 7.8. Electron paramagnetic resonance (EPR) analysis was conducted to investigate the origin of high OER activity of Mn₅O₈ NPs. From the EPR analysis, Mn³⁺ was found to be involved in the OER process of the Mn₅O₈ materials. (Chemical Equation Presented).

Original language	English
Pages (from-to)	4624-4628
Number of pages	5
Journal	ACS Catalysis
Volume	5
Issue number	8
DOIs	https://doi.org/10.1021/acscatal.5b01269
Publication status	Published - 2015 Aug 7
Externally published	Yes

Keywords

electrocatalyst
micron-sized MnO
MnO nanoparticles
oxygen evolution reaction (OER)
water splitting

ASJC Scopus subject areas

Catalysis
Chemistry(all)

UN SDGs

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

Access to Document

10.1021/acscatal.5b01269

Cite this

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title = "Mn5O8 Nanoparticles as Efficient Water Oxidation Catalysts at Neutral pH",

abstract = "Mn5O8 nanoparticles (NPs) were obtained via the controlled oxidation of MnO NPs. The oxygen evolution reaction (OER) properties of Mn5O8 NPs were evaluated using cyclic voltammetry (CV). A current density of 5 mA/cm2 was reached when 580 mV of overpotential was applied at pH 7.8. Electron paramagnetic resonance (EPR) analysis was conducted to investigate the origin of high OER activity of Mn5O8 NPs. From the EPR analysis, Mn3+ was found to be involved in the OER process of the Mn5O8 materials. (Chemical Equation Presented).",

keywords = "electrocatalyst, micron-sized MnO, MnO nanoparticles, oxygen evolution reaction (OER), water splitting",

author = "Donghyuk Jeong and Kyoungsuk Jin and Jerng, {Sung Eun} and Hongmin Seo and Donghun Kim and Nahm, {Seung Hoon} and Kim, {Sun Hee} and Nam, {Ki Tae}",

note = "Publisher Copyright: {\textcopyright} 2015 American Chemical Society.",

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doi = "10.1021/acscatal.5b01269",

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T1 - Mn5O8 Nanoparticles as Efficient Water Oxidation Catalysts at Neutral pH

AU - Jeong, Donghyuk

AU - Jin, Kyoungsuk

AU - Jerng, Sung Eun

AU - Seo, Hongmin

AU - Kim, Donghun

AU - Nahm, Seung Hoon

AU - Kim, Sun Hee

AU - Nam, Ki Tae

PY - 2015/8/7

Y1 - 2015/8/7

N2 - Mn5O8 nanoparticles (NPs) were obtained via the controlled oxidation of MnO NPs. The oxygen evolution reaction (OER) properties of Mn5O8 NPs were evaluated using cyclic voltammetry (CV). A current density of 5 mA/cm2 was reached when 580 mV of overpotential was applied at pH 7.8. Electron paramagnetic resonance (EPR) analysis was conducted to investigate the origin of high OER activity of Mn5O8 NPs. From the EPR analysis, Mn3+ was found to be involved in the OER process of the Mn5O8 materials. (Chemical Equation Presented).

AB - Mn5O8 nanoparticles (NPs) were obtained via the controlled oxidation of MnO NPs. The oxygen evolution reaction (OER) properties of Mn5O8 NPs were evaluated using cyclic voltammetry (CV). A current density of 5 mA/cm2 was reached when 580 mV of overpotential was applied at pH 7.8. Electron paramagnetic resonance (EPR) analysis was conducted to investigate the origin of high OER activity of Mn5O8 NPs. From the EPR analysis, Mn3+ was found to be involved in the OER process of the Mn5O8 materials. (Chemical Equation Presented).

KW - electrocatalyst

KW - micron-sized MnO

KW - MnO nanoparticles

KW - oxygen evolution reaction (OER)

KW - water splitting

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