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Temperature dependence of the pseudomorphic transformation of MoO3 to gamma-Mo2N
Zhang, YJ; Xin, Q; Rodriguez-Ramos, I; Guerrero-Ruiz, A
关键词Nitrides Crystal Growth X-ray Diffraction X-ray Photoelectron Spectroscopy Surface Properties
刊名MATERIALS RESEARCH BULLETIN
1999
34期:1页:145-156
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Technology
类目[WOS]Materials Science, Multidisciplinary
研究领域[WOS]Materials Science
关键词[WOS]TRANSITION-METAL CARBIDES ; NITRIDE HYDRODENITROGENATION CATALYSTS ; MOLYBDENUM NITRIDE ; SURFACE-AREA ; HYDRODESULFURIZATION ; TUNGSTEN ; MO2N ; HYDROGENATION ; QUINOLINE ; BEHAVIOR
英文摘要The transformation of MoO3 into gamma-Mo2N during its nitridation by temperature-programmed reaction with NH3/has been investigated. The X-ray diffraction (XRD) results indicate that the conversion of the MoO3 bulk structure was significant at 673 K, although a notable increase in the surface area was observed at higher temperatures such as 773 K. For the sample synthesized at 973 K for 2 h, the achieved surface area was 140 m(2).g(-1) with approximately 60% pore volume within the diameter range of 20-30 Angstrom. The XRD and differential thermal analysis (DTA) results indicate that some intermediates, i.e., H0.3MoO3, MoO2, and gamma-Mo2OxN1-x, were formed during the pseudomorphic transformation of MoO3 to gamma-Mo2N in the temperature range of 673-973 K. Some new information about the transformation reaction was provided by X-ray photoelectron spectroscopy (XPS) and Fourier transformed infrared (FT-IR) spectroscopy. XPS results revealed that Mo2+ species was the main species exposed at the surface of passivated samples. (C) 1999 Elsevier Science Ltd.
语种英语
WOS记录号WOS:000079769300017
引用统计
被引频次:8[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/138536
专题中国科学院大连化学物理研究所
作者单位1.Univ Nacl Educ Distancia, Fac Ciencias, Dept Quim Inorgan, Madrid 28040, Spain
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
3.CSIC, Inst Catalisis & Petr Quim, Madrid 28049, Spain
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Zhang, YJ,Xin, Q,Rodriguez-Ramos, I,et al. Temperature dependence of the pseudomorphic transformation of MoO3 to gamma-Mo2N[J]. MATERIALS RESEARCH BULLETIN,1999,34(1):145-156.
APA Zhang, YJ,Xin, Q,Rodriguez-Ramos, I,&Guerrero-Ruiz, A.(1999).Temperature dependence of the pseudomorphic transformation of MoO3 to gamma-Mo2N.MATERIALS RESEARCH BULLETIN,34(1),145-156.
MLA Zhang, YJ,et al."Temperature dependence of the pseudomorphic transformation of MoO3 to gamma-Mo2N".MATERIALS RESEARCH BULLETIN 34.1(1999):145-156.
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