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Date of Publication:2017-01-01

Journal:催化学报

Affiliation of Author(s):化工学院

Volume:38

Issue:11

Page Number:1812-1817

ISSN No.:0253-9837

Abstract:In this study, we fabricated a NiOx film by electrodeposition of an ethanediamine nickel complex precursor (pH = 11) on a fluorine-doped tin oxide substrate. The resulting film is robust and exhib-its high catalytic activity for electrochemical water oxidation. Water oxidation is initiated with an overpotential of 375 mV (1 mA/cm2) and a steady current density of 8.5 mA/cm2 is maintained for at least 10 h at 1.3 V versus the normal hydrogen electrode. Kinetic analysis reveals that there is a 2e-/3H+ pre-equilibrium process before the chemical rate-determining step. The low-cost prepara-tion, robustness, and longevity make this catalyst competitive for applications in solar energy con-version and storage.

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