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Hybrid Nanocarbon as a Catalyst for Direct Dehydrogenation of Propane: Formation of an Active and Selective Core-Shell sp(2)/sp(3) Nanocomposite Structure
R. Wang; X. Y. Sun; B. S. Zhang; D. S. Su
2014
Source PublicationChemistry-a European Journal
ISSN0947-6539
Volume20Issue:21Pages:6324-6331
AbstractHybrid nanocarbon, comprised of a diamond core and a graphitic shell with a variable sp(2)-/sp(3)-carbon ratio, is controllably obtained through sequential annealing treatment (550-1300 degrees C) of nanodiamond. The formation of sp(2) carbon increases with annealing temperature and the nanodiamond surface is reconstructed from amorphous into a well-ordered, onion-like carbon structure via an intermediate composite structurea diamond core covered by a defective, curved graphene outer shell. Direct dehydrogenation of propane shows that the sp(2)-/sp(3)-nanocomposite exhibits superior catalytic performance to that of individual nanodiamond and graphitic nanocarbon. The optimum catalytic activity of the diamond/graphene composite depends on the maximum structural defectiveness and high chemical reactivity of the ketone groups. Ketone-type functional groups anchored on the defects/vacancies are active for propene formation; nevertheless, once the oxygen functional groups are desorbed, the defects/vacancies alone might be active sites responsible for the CH bond activation of propane.
description.department[wang, rui ; sun, xiaoyan ; zhang, bingsen ; sun, xiaoying ; su, dangsheng] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. [wang, rui] natl inst clean & low carbon energy, beijing 102209, peoples r china. ; su, ds (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china. ; dssu@imr.ac.cn
KeywordCarbon Core-shell Structures Dehydrogenation Propane Nanoparticles Diamond Nanoparticles Nanodiamond Powders Surface-chemistry Graphene Oxide Carbon Onions Oxidation Transformation Nanotubes Phase Black
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Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/72918
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
R. Wang,X. Y. Sun,B. S. Zhang,et al. Hybrid Nanocarbon as a Catalyst for Direct Dehydrogenation of Propane: Formation of an Active and Selective Core-Shell sp(2)/sp(3) Nanocomposite Structure[J]. Chemistry-a European Journal,2014,20(21):6324-6331.
APA R. Wang,X. Y. Sun,B. S. Zhang,&D. S. Su.(2014).Hybrid Nanocarbon as a Catalyst for Direct Dehydrogenation of Propane: Formation of an Active and Selective Core-Shell sp(2)/sp(3) Nanocomposite Structure.Chemistry-a European Journal,20(21),6324-6331.
MLA R. Wang,et al."Hybrid Nanocarbon as a Catalyst for Direct Dehydrogenation of Propane: Formation of an Active and Selective Core-Shell sp(2)/sp(3) Nanocomposite Structure".Chemistry-a European Journal 20.21(2014):6324-6331.
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