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Uniform, Assembled 4 nm Mn3O4 Nanoparticles as Efficient Water Oxidation Electrocatalysts at Neutral pH
Cited 59 time in
Web of Science
Cited 58 time in Scopus
- Authors
- Issue Date
- 2020-03
- Publisher
- John Wiley & Sons Ltd.
- Citation
- Advanced Functional Materials, Vol.30 No.10, p. 1910424
- Abstract
- Electrochemical water splitting is one of the ways to produce environmentally-friendly hydrogen energy. Transition-metal (TM)-based catalysts have been attracting attention due to their low cost and abundance, but their insufficient activity still remains a challenge. Here, 4 nm Mn3O4 nanoparticles (NPs) are successfully synthesized and their electrochemical behavior is investigated. Using electrokinetic analyses, an identical water oxidizing mechanism is demonstrated between the 4 and 8 nm Mn3O4 NPs. In addition, it is confirmed that the overall increase in the active surface area is strongly correlated with the superb catalytic activity of the 4 nm Mn3O4 NPs. To further enhance the oxygen evolution reaction (OER) performance, Ni foam substrate is introduced to maximize the entire number of the NPs participating in OER. The 4 nm Mn3O4/Ni foam electrode exhibits outstanding electrocatalytic activity for OER with overpotential of 395 mV at a current density of 10 mA cm−2 under neutral conditions (0.5 m PBS, pH 7). © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
- ISSN
- 1616-301X
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