IrO2-SiO2 binary oxide films: Preparation, physiochemical characterization and their electrochemical properties

doi:10.1016/j.electacta.2010.03.014

IMR OpenIR

	IrO2-SiO2 binary oxide films: Preparation, physiochemical characterization and their electrochemical properties
	Wang, Xiao-Mei 1; Hu, Ji-Ming 1; Zhang, Jian-Qing 1,2
通讯作者	Hu, Ji-Ming()
	2010-06-01
发表期刊	ELECTROCHIMICA ACTA
ISSN	0013-4686
卷号	55 期号:15 页码:4587-4593
摘要	Mixed IrO2-SiO2 oxide films were prepared on titanium substrate by the thermo-decomposition of hexachloroiridate (H2IrCl6) 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 IrCl62- complexes in the precursors decreases in the presence of TEOS. indicating the interaction between these two components. Thermal analysis shows the decomposition reaction of H2IrCl6 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 IrO2, 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 IrO2 electrodes is found to apparently improve with appropriate amount of SiO2 incorporation, as tested under galvanostatic electrolysis. (C) 2010 Elsevier Ltd. All rights reserved
关键词	IrO2 SiO2 Binary oxide Electrocatalyst Oxygen evolution reaction (OER)
资助者	National Natural Science Foundation of China ; Chinese Universities Scientific Fund
DOI	10.1016/j.electacta.2010.03.014
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[20473072] ; National Natural Science Foundation of China[20871101] ; Chinese Universities Scientific Fund[2009QNA3007]
WOS研究方向	Electrochemistry
WOS类目	Electrochemistry
WOS记录号	WOS:000278730400025
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：48[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/100505
专题	中国科学院金属研究所
通讯作者	Hu, Ji-Ming
作者单位	1.Zhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China 2.State Key Lab Corros & Protect, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xiao-Mei,Hu, Ji-Ming,Zhang, Jian-Qing. IrO2-SiO2 binary oxide films: Preparation, physiochemical characterization and their electrochemical properties[J]. ELECTROCHIMICA ACTA,2010,55(15):4587-4593.
APA	Wang, Xiao-Mei,Hu, Ji-Ming,&Zhang, Jian-Qing.(2010).IrO2-SiO2 binary oxide films: Preparation, physiochemical characterization and their electrochemical properties.ELECTROCHIMICA ACTA,55(15),4587-4593.
MLA	Wang, Xiao-Mei,et al."IrO2-SiO2 binary oxide films: Preparation, physiochemical characterization and their electrochemical properties".ELECTROCHIMICA ACTA 55.15(2010):4587-4593.