Mesoporous silica supported cobalt catalysts for hydrogen generation in hydrolysis of ammonia borane

	Mesoporous silica supported cobalt catalysts for hydrogen generation in hydrolysis of ammonia borane
	Luo, Yi-Chia 1; Liu, Yi-Hsin 1; Hung, Yann 1; Liu, Xiao-Yan 2; Mou, Chung-Yuan 1
刊名	international journal of hydrogen energy
	2013-06-18
卷号	38 期号:18 页码:7280-7290
关键词	Ammonia-borane Hydrolysis Hydrogen generation X-ray absorption spectroscopy Supported Co-B catalyst MCM-41 acidity
英文摘要	mesoporous silica supported cobalt boride (co-b) catalysts are rationally designed for hydrogen generation in ammonia-borane hydrolysis reactions under ambient conditions. cobalt boride catalysts are supported on three different mesoporous silica, including beta-zeolite seeded mcm-41 (co@m41s) and traditional mcm-41 (co@m41t) via chemical adsorption onto functionalized surface with 3-trihydroxysilylpropylmethylphosphonate (thpmp), and one-step co-precipitation into mesoporous silica framework (co@m41c). our preparation strategies provide two insights to the reactions: first, cobalt oxide species are intrinsically deposited as ultra-small nanoparticles (<2 nm) on mesoporous silica supports; subsequently the nanoparticles are converted to active co-b catalysts by reduction with sodium borohydride (sb). three catalysts exhibit significant differences in catalytic reactivities with hydrogen production rates ranked in an order of co@m41s > co@m41t > co@m41c. detailed analysis of the coordination environments from in situ x-ray absorption spectroscopy (xas) results confirm reducibility in sb. amorphous nature of co-b catalysts are responsible for efficient catalytic activity in co@m41s and co@m41t. ammonia temperature programmed desorption (nh3-tpd) demonstrates support acidity that correlates to the degree of high dispersity and effective reducibility to co-b. effects from catalyst sizes, reducibility in sb treatment and surface acidity are studied in detail to compare catalytic reactivities among three types of supports. copyright (c) 2013, hydrogen energy publications, llc. published by elsevier ltd. all rights reserved.
WOS标题词	science & technology ; physical sciences ; technology
类目[WOS]	chemistry, physical ; electrochemistry ; energy & fuels
研究领域[WOS]	chemistry ; electrochemistry ; energy & fuels
关键词[WOS]	b alloy catalysts ; room-temperature ; sodium-borohydride ; nabh4 hydrolysis ; boride catalysts ; fuel-cells ; co ; efficient ; metal ; dehydrogenation
收录类别	SCI
语种	英语
WOS记录号	WOS:000321165400012
公开日期	2015-11-10
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/137723]
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.Natl Taiwan Univ, Dept Chem, Taipei 10617, Taiwan 2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian, Peoples R China
推荐引用方式 GB/T 7714	Luo, Yi-Chia,Liu, Yi-Hsin,Hung, Yann,et al. Mesoporous silica supported cobalt catalysts for hydrogen generation in hydrolysis of ammonia borane[J]. international journal of hydrogen energy,2013,38(18):7280-7290.
APA	Luo, Yi-Chia,Liu, Yi-Hsin,Hung, Yann,Liu, Xiao-Yan,&Mou, Chung-Yuan.(2013).Mesoporous silica supported cobalt catalysts for hydrogen generation in hydrolysis of ammonia borane.international journal of hydrogen energy,38(18),7280-7290.
MLA	Luo, Yi-Chia,et al."Mesoporous silica supported cobalt catalysts for hydrogen generation in hydrolysis of ammonia borane".international journal of hydrogen energy 38.18(2013):7280-7290.