Fe2O3-Co3O4异质结的熔盐法制备及其析氢性能

doi:10.19964/j.issn.1006-4990.2023-0262

Abstract

Abstract:

Oxides have promising applications in electrocatalytic hydrogen evolution reactions.By using NaF and KNO₃ as the reaction medium and CoCl₃ and FeCl₃ as the raw materials，the final product Fe₂O₃-Co₃O₄ heterojunctions could be produced using molten salt method by calcining at 350 ℃ for two hours and used for green hydrogen production.The morphology，phase structure and electronic structure information of the obtained samples were characterized by X-ray diffraction（XRD），scanning electron microscope（SEM），transmission electron microscope（TEM），X-ray photoelectron spectroscopy（XPS），verifying the effective coupling between Fe₂O₃ and Co₃O₄.The introduction of Fe₂O₃ roughened the catalyst surface and substantially increased the active specific surface area.Besides，there was an electronic interaction between Fe₂O₃ and Co₃O₄.Fe₂O₃ provided electrons to Co₃O₄ to reduce the valence state of Co atom，which greatly improved the hydrogen evolution reaction activity of Fe₂O₃-Co₃O₄heterostructure.The hydrogen evolution performance of alkaline electrolyzed water was explored by electrochemical workstation.The overpotential at 10 mA/cm² was 302 mV and the Tafel slope was 60.9 mV/dec，both of which were lower than that of the Co₃O₄.Meanwhile，Fe₂O₃-Co₃O₄ showed good stability in the alkaline electrolyte.

Key words: molten salt method, heterosture, cobalt iron oxide, electrocatalytic hydrogen evolution

CLC Number:

TQ151.1

LI Yuhang, WANG Yinbin, WEI Qiang. Preparation of Fe₂O₃-Co₃O₄ heterojunction by molten salt method and its hydrogen evolution performance[J]. Inorganic Chemicals Industry, 2023, 55(8): 51-58.

Figures/Tables 11

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Preparation of Fe₂O₃-Co₃O₄ heterojunction by molten salt method and its hydrogen evolution performance

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Preparation of Fe2O3-Co3O4 heterojunction by molten salt method and its hydrogen evolution performance