| 1 | Annealing temperature dependent catalytic water oxidation activity of iron oxyhydroxide thin films显示文摘Nanostructured iron oxyhydroxide(Fe OOH) thin films have been synthesized using an electrodeposition method on a nickel foam(NF) substrate and effect of air annealing temperature on the catalytic performance is studied. The as-deposited and annealed thin films were characterized by X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS), field emission scanning electron microscopy(FE-SEM) and linear sweep voltammetry(LSV) to determine their structural, morphological, compositional and electrochemical properties, respectively. The as-deposited nanostructured amorphous Fe OOH thin film is converted into a polycrystalline Fe_2O_3 with hematite crystal structure at a high temperature. The Fe OOH thin film acts as an efficient electrocatalyst for the oxygen evolution reaction(OER) in an alkaline 1 M KOH electrolyte. The film annealed at 200 °C shows high catalytic activity with an onset overpotential of 240 m V with a smaller Tafel slope of 48 m V/dec. Additionally, it needs an overpotential of 290 mV to the drive the current density of 10 m A/cm^2 and shows good stability in the 1 M KOH electrolyte solution. | P.T.Babar B.S.Pawar A.C.Lokhande M.G.Gang J.S.Jang M.P.Suryawanshi S.M.Pawar Jin Hyeok Kim | 2017 | Journal of Energy Chemistry2017，26，4： | 4 |
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