Facile Synthesis and Characterisation of IrO<sub>2</sub>/ATO as Novel OER Electrocatalysts

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Abstract Water electrolysers of solid polymer electrolyte (SPE) have been shown to be a promising method of producing hydrogen, but it is short of a stable oxygen electrocatalysts. In the current study, we seek to explore an advanced and facile method for the preparation of IrO₂ deposited on Sb-doped SnO₂ (ATO) nanoparticles. The IrO₂/ATO particulates were characterized by SEM, TEM, XRD and XPS. The electrochemical properties were examined via cyclic voltammetry(CV), steady state polarization, electrochemical impedance spectroscopy(EIS) and chronoamperometry(CA) measurements. In fact, it was found that the IrO₂/ATO synthesized with the novel method maintained an enhanced electrocatalytic activity and got a current density of 105 mA·cm^-2 at 1.6 V. Its stability toward oxygen evolution reaction (OER) in acidic media was tested at 1.5 V, and the current density decaying rate was 1.687×10^-2 (mA·cm^-2)·h^-1. To improve the loading of the catalysts, the current density toward OER was enhanced significantly, even if the current density of unit mass of Ir will decrease.

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Keywords�� IrO₂/ATO�� OER�� electrocatalysts�� SPE water electrolysers

Received 2013-05-13;

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Wang Pan, Guo Jianzhao, Wang Yuxin.Facile Synthesis and Characterisation of IrO₂/ATO as Novel OER Electrocatalysts[J] Chemcial Industry and Engineering, 2015,V32(2): 50-55

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