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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
关键词Ammonia Calorimetry Carbon Nanotubes Confinement Ruthenium
刊名CHEMISTRY-A EUROPEAN JOURNAL
2010
DOI10.1002/chem.200902371
16期:18页:5379-5384
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Chemistry, Multidisciplinary
研究领域[WOS]Chemistry
关键词[WOS]AMMONIA-SYNTHESIS ; RUTHENIUM CATALYST ; SURFACES ; MOLECULES ; CHEMISTRY ; METAL ; IRON ; CO ; HYDROGENATION ; CONFINEMENT
英文摘要Carbon 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.
语种英语
WOS记录号WOS:000277988900018
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/142189
专题中国科学院大连化学物理研究所
作者单位1.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
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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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