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Probing the Electronic Effect of Carbon Nanotubes in Catalysis: NH3 Synthesis with Ru Nanoparticles
Guo, Shujing1; Pan, Xiulian1; Gao, Haili2,3; Yang, Zhiqiang1; Zhao, Jijun2,3; Bao, Xinhe1
KeywordAmmonia Calorimetry Carbon Nanotubes Confinement Ruthenium
Source PublicationCHEMISTRY-A EUROPEAN JOURNAL
2010
DOI10.1002/chem.200902371
Volume16Issue:18Pages:5379-5384
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Multidisciplinary
WOS Research AreaChemistry
WOS KeywordAMMONIA-SYNTHESIS ; RUTHENIUM CATALYST ; SURFACES ; MOLECULES ; CHEMISTRY ; METAL ; IRON ; CO ; HYDROGENATION ; CONFINEMENT
AbstractCarbon nanotubes (CNTs) have been shown to modify some properties of nanomaterials and to modify chemical reactions confined inside their channels, which are formed by curved graphene layers. Here we studied ammonia synthesis over Ru as a probe reaction to understand the effect of the electron structure of CNTs on the confined metal particles and their catalytic activity. The catalyst with Ru nanoparticles dispersed almost exclusively on the exterior nanotube surface exhibits a higher activity than the CNT-confined Ru, although both have a similar metal particle size. Characterization with TEM, N-2 physisorption, H-2 chemisorption, temperature-programmed reduction. CO adsorption microcalorimetry, and first-principles calculations suggests that the outside Ru exhibits a higher electron density than the inside Ru. As a result, the dissociative adsorption of N-2 which is an electrophilic process and the rate-determining step of ammonia synthesis. is more facile over the outside Ru than that over the inside one.
Language英语
WOS IDWOS:000277988900018
Citation statistics
Cited Times:124[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/142189
Collection中国科学院大连化学物理研究所
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Dalian Univ Technol, Sch Phys & Optoelect Technol, Dalian 116024, Peoples R China
3.Dalian Univ Technol, Coll Adv Sci & Technol, Dalian 116024, Peoples R China
Recommended Citation
GB/T 7714
Guo, Shujing,Pan, Xiulian,Gao, Haili,et al. Probing the Electronic Effect of Carbon Nanotubes in Catalysis: NH3 Synthesis with Ru Nanoparticles[J]. CHEMISTRY-A EUROPEAN JOURNAL,2010,16(18):5379-5384.
APA Guo, Shujing,Pan, Xiulian,Gao, Haili,Yang, Zhiqiang,Zhao, Jijun,&Bao, Xinhe.(2010).Probing the Electronic Effect of Carbon Nanotubes in Catalysis: NH3 Synthesis with Ru Nanoparticles.CHEMISTRY-A EUROPEAN JOURNAL,16(18),5379-5384.
MLA Guo, Shujing,et al."Probing the Electronic Effect of Carbon Nanotubes in Catalysis: NH3 Synthesis with Ru Nanoparticles".CHEMISTRY-A EUROPEAN JOURNAL 16.18(2010):5379-5384.
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