Water oxidation by manganese oxide electrocatalytic films synthesized by chemical solution deposition method

Hyo Sang Jeon, Su Jin Ahn, Michael Shincheon Jee, Suk Goo Yoon, Yun Jeong Hwang, Byoung Koun Min

Research output: Contribution to journalArticle

11 Citations (Scopus)

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°C after the precursor solution coating on fluorine-doped tin oxide (FTO) glass substrates. The MnOx electrocatalytic film prepared at 450°C has exhibited the most catalytic activity for OER with the overpotential of 387 mV at 10 mA/cm2 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.

Original languageEnglish
Pages (from-to)F3113-F3118
JournalJournal of the Electrochemical Society
Volume163
Issue number11
DOIs
Publication statusPublished - 2016

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Materials Chemistry
  • Electrochemistry

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