IrO(2)-SiO(2) binary oxide films: Preparation, physiochemical characterization and their electrochemical properties

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	IrO(2)-SiO(2) binary oxide films: Preparation, physiochemical characterization and their electrochemical properties
	X. M. Wang; J. M. Hu; J. Q. Zhang
	2010
发表期刊	Electrochimica Acta
ISSN	0013-4686
卷号	55 期号:15 页码:4587-4593
摘要	Mixed IrO(2)-SiO(2) oxide films were prepared on titanium substrate by the thermo-decomposition of hexachloroiridate (H(2)IrCl(6)) and tetraethoxysilane (TEOS) mixed precursors in organic solvents. The solution chemistry and thermal decomposition kinetics of the mixed precursors were investigated by ultra violet/visible (UV/vis) spectroscopy and thermogravimetry (TGA) and differential thermal analysis (DTA). respectively The physiochemical characterization of the resulting materials was conducted by X-ray diffraction (XRD), scanning electron microscopy (SEM) and electrochemical measurements. It is shown from the UV/vis spectra that the electronic absorption intensity of IrCl(6)(2-) complexes in the precursors decreases in the presence of TEOS. indicating the interaction between these two components. Thermal analysis shows the decomposition reaction of H(2)IrCl(6) is inhibited by TEOS in the low temperature range, but the further oxidation reaction at high temperatures of formed intermediates is independent of the presence of silane component. Physical measurements show a restriction effect of silica on the ciystallization and crystal growth processes of IrO(2), leading to the formation of finer oxide pal tidies and the porous morphology of the binary oxide films. The porous composite films exhibit high apparent electrocatalytic activity toward the oxygen evolution reaction In addition, the long-term stability of Ti-supported IrO(2) electrodes is found to apparently improve with appropriate amount of SiO(2) incorporation, as tested under galvanostatic electrolysis. (C) 2010 Elsevier Ltd. All rights reserved
部门归属	[wang, xiao-mei; hu, ji-ming; zhang, jian-qing] zhejiang univ, dept chem, hangzhou 310027, zhejiang, peoples r china. [zhang, jian-qing] state key lab corros & protect, shenyang 110016, peoples r china.;hu, jm (reprint author), zhejiang univ, dept chem, hangzhou 310027, zhejiang, peoples r china
关键词	Iro(2) Sio(2) Binary Oxide Electrocatalyst Oxygen Evolution Reaction (Oer) X-ray-diffraction Surface Characterization Oxygen Evolution Thin-films Electrodes Titanium Electrocatalysts Iridium Anodes Acid
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31529
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. M. Wang,J. M. Hu,J. Q. Zhang. IrO(2)-SiO(2) binary oxide films: Preparation, physiochemical characterization and their electrochemical properties[J]. Electrochimica Acta,2010,55(15):4587-4593.
APA	X. M. Wang,J. M. Hu,&J. Q. Zhang.(2010).IrO(2)-SiO(2) binary oxide films: Preparation, physiochemical characterization and their electrochemical properties.Electrochimica Acta,55(15),4587-4593.
MLA	X. M. Wang,et al."IrO(2)-SiO(2) binary oxide films: Preparation, physiochemical characterization and their electrochemical properties".Electrochimica Acta 55.15(2010):4587-4593.