MnO2/SiO2-SO3H nanocomposite as hydrogen peroxide scavenger for durability improvement in proton exchange membranes

	MnO2/SiO2-SO3H nanocomposite as hydrogen peroxide scavenger for durability improvement in proton exchange membranes
	Zhao, D.1,2; Yi, B. L.1,3; Zhang, H. M.1; Yu, H. M.3
刊名	journal of membrane science
	2010
卷号	346 期号:1 页码:143-151
关键词	Durability Manganese dioxide Surface-sulfonated Free radicals Hydrogen peroxide Fast Blue BB Salt
通讯作者	衣宝廉
产权排序	1;1
英文摘要	membrane durability was a key problem to the development of proton exchange membrane fuel cells (pemfcs). a novel nanocomposite mno2/sio2-so3h was prepared to mitigate the hydrogen peroxide attack to the membranes at fuel cell condition. the nanocomposites were synthesized by the wet chemical method and three-step functionalization. the crystal structure was characterized by x-ray powder diffraction (xrd), the crystallite size and the distribution of the nanocomposites were investigated by tem. sem-edx was used to analyze the elemental distribution on the surface of the nanocomposite. and the surface functional groups (-so3h) were evaluated by ft-ir. the amount of sulfonic acid groups introduced onto the silica surface was determined by titration method. the radical scavenging ability was estimated by uv-vis spectroscopy using dimethyl sulfoxide (dmso) as the trapping agent. the membrane durability was investigated via ex situ fenton test and in situ open circuit voltage (ocv) accelerated test. in these tests, the fluoride emission rate (fer) reduced by nearly one order of magnitude with the dispersion of mno2/sio2-so3h nanocomposites into nafion membrane, suggesting that mno2/sio2-so3h nanocomposites had a promising application to mitigate the degradation of the proton exchange membrane. (c) 2009 elsevier b.v. all rights reserved.
WOS标题词	science & technology ; technology ; physical sciences
类目[WOS]	engineering, chemical ; polymer science
研究领域[WOS]	engineering ; polymer science
关键词[WOS]	polymer electrolyte membranes ; pem fuel-cells ; perfluorinated sulfonic-acid ; standard addition method ; composite membranes ; electrochemical properties ; degradation mechanism ; gas-crossover ; catalytic-activity ; performance
收录类别	SCI
原文出处	false
语种	英语
WOS记录号	WOS:000271959000016
公开日期	2010-11-30
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/103549]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, Lab PEMFC Key Mat & Technol, Dalian 116023, Liaoning, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.Chinese Acad Sci, Dalian Inst Chem Phys, Fuel Cell Syst & Engn Lab, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Zhao, D.,Yi, B. L.,Zhang, H. M.,et al. MnO2/SiO2-SO3H nanocomposite as hydrogen peroxide scavenger for durability improvement in proton exchange membranes[J]. journal of membrane science,2010,346(1):143-151.
APA	Zhao, D.,Yi, B. L.,Zhang, H. M.,&Yu, H. M..(2010).MnO2/SiO2-SO3H nanocomposite as hydrogen peroxide scavenger for durability improvement in proton exchange membranes.journal of membrane science,346(1),143-151.
MLA	Zhao, D.,et al."MnO2/SiO2-SO3H nanocomposite as hydrogen peroxide scavenger for durability improvement in proton exchange membranes".journal of membrane science 346.1(2010):143-151.