Evolution and Reactivity of Active Oxygen Species on sp(2)@sp(3) Core-Shell Carbon for the Oxidative Dehydrogenation Reaction

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	Evolution and Reactivity of Active Oxygen Species on sp(2)@sp(3) Core-Shell Carbon for the Oxidative Dehydrogenation Reaction
	X. Y. Sun; R. Wang; B. S. Zhang; R. Huang; X. Huang; D. S. Su; T. Chen; C. X. Miao; W. M. Yang
	2014
发表期刊	Chemcatchem
ISSN	1867-3880
卷号	6 期号:8 页码:2270-2275
摘要	Different sp(2)@sp(3) core-shell structures are obtained on nano-diamond by using annealing treatment at increasingly higher temperatures. The resulting nanocarbons can serve as model catalysts to investigate the structural effect on the evolution and chemical nature of oxygen functional groups for oxidative dehydrogenation reactions. We studied in situ reactions and characterization data and found that the initial existence of oxygen-containing groups on a catalyst surface had a low contribution to the catalytic performance. The active oxygen species can be generated promptly in situ by the chemisorption of O-2 under the reaction conditions and involved in catalytic dehydrogenation process following a redox mechanism. For different hybridized nanostructures, the same types of generated active oxygen groups show different catalytic capabilities, which can be regulated by the sp(2)-hybridized carbon fraction of nanodiamond. The ketonic carbonyl groups formed on graphitic onion-like carbon surface are more active and can improve the selectivity to alkenes significantly compared with the initial nanodiamond and traditional carbon nanotubes.
部门归属	[sun, xiaoyan ; zhang, bingsen ; huang, rui ; su, dang sheng] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [wang, rui] natl inst clean & low carbon energy, beijing 102209, peoples r china. [huang, xing] max planck gesell, fritz haber inst, d-14195 berlin, germany. [chen, tong ; miao, changxi ; yang, weimin] sinopec shanghai res inst petrochem technol, shanghai 201208, peoples r china. ; su, ds (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china. ; dssu@imr.ac.cn
关键词	Alkanes Carbon Dehydrogenation Nanostructures Oxygen Onion-like Carbon Surface-chemistry Nanodiamond Graphitization Functional-groups N-butane Nanotubes Ethylbenzene Catalysts Styrene Diamond
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语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73378
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. Y. Sun,R. Wang,B. S. Zhang,et al. Evolution and Reactivity of Active Oxygen Species on sp(2)@sp(3) Core-Shell Carbon for the Oxidative Dehydrogenation Reaction[J]. Chemcatchem,2014,6(8):2270-2275.
APA	X. Y. Sun.,R. Wang.,B. S. Zhang.,R. Huang.,X. Huang.,...&W. M. Yang.(2014).Evolution and Reactivity of Active Oxygen Species on sp(2)@sp(3) Core-Shell Carbon for the Oxidative Dehydrogenation Reaction.Chemcatchem,6(8),2270-2275.
MLA	X. Y. Sun,et al."Evolution and Reactivity of Active Oxygen Species on sp(2)@sp(3) Core-Shell Carbon for the Oxidative Dehydrogenation Reaction".Chemcatchem 6.8(2014):2270-2275.