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Water Oxidation by Manganese Oxide Electrocatalytic Films Synthesized by Chemical Solution Deposition Method

Authors
Jeon, Hyo SangAhn, Su JinJee, Michael ShincheonYoon, Sam S.Hwang, Yun JeongMin, Byoung Koun
Issue Date
2016
Publisher
ELECTROCHEMICAL SOC INC
Citation
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, v.163, no.11, pp.F3113 - F3118
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume
163
Number
11
Start Page
F3113
End Page
F3118
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/90324
DOI
10.1149/2.0171611jes
ISSN
0013-4651
Abstract
Water splitting catalyzed by low cost and earth abundant material is critically important issue in mass production of hydrogen from water using electrical energy. In this study, we developed highly efficient manganese oxide (MnOx) electrocatalytic films by a simple chemical solution deposition (CSD) method for oxygen evolution reaction (OER). Specifically, the MnOx electrocatalytic films were synthesized at different annealing temperatures at 350, 450, and 550 degrees C after the precursor solution coating on fluorine-doped tin oxide (FTO) glass substrates. The MnOx electrocatalytic film prepared at 450 degrees C has exhibited the most catalytic activity for OER with the overpotential of 387 mV at 10 mA/cm(2) in 1 M NaOH alkaline solution. We suggested that this high OER activity of MnOx electrocatalytic film arise from the higher surface area, richer Mn3+ state on the catalysts surface, and low charge transfer resistance between electrocatalytic film and electrolyte based on electrochemical surface area (ECSA), X-ray photoelectron spectroscopy (XPS), and electrochemical impedance spectroscopy (EIS) analysis. (C) 2016 The Electrochemical Society. All rights reserved.
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공과대학 (기계공학부)
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