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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; Yi BL(衣宝廉)
关键词Durability Manganese Dioxide Surface-sulfonated Free Radicals Hydrogen Peroxide Fast Blue Bb Salt
刊名JOURNAL OF MEMBRANE SCIENCE
2010
DOI10.1016/j.memsci.2009.09.031
346期:1页:143-151
收录类别SCI
文章类型Article
部门归属3
项目归属303
产权排名1;1
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
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.
语种英语
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WOS记录号WOS:000271959000016
引用统计
被引频次:35[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/103549
专题中国科学院大连化学物理研究所
通讯作者Yi BL(衣宝廉)
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
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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.,&衣宝廉.(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.
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