Raman Spectra of a Cobalt Oxide-Molybdenum Oxide Supported Catalyst The structures of cobalt-molybdenum supported catalysts are of great interest because of their use in the hydrodesulfurization of petroleum products and co... FR Brown,LE Makovsky - 《Applied Spectroscopy》 被引量: 110发表: 1977年...
Laser Raman spectra of oxide precursors of hydrodesulfurization catalysts containing 0-30% molybdenum trioxide and/or 0-10% cobalt oxide on two alumina and... J Medema,VHJD Beer,C Van Stam,... - J. Catal.; (United States) 被引量: 164发表: 1978年 Structural state of microcrystalline opals...
Raman spectra indicate the presence of an intermediate cobalt oxide (CoO x) phase upon decomposition of Co–Al-HTlc in the temperature range of 175–250°C, before formation of a solid solution of cobalt spinels (Co(Co, Al) 2O 4) occurs. Highly dispersed NiO strongly interacting with the...
The FT-Raman spectra of Se(tu) 2 Cl 2 and Se(tu) 2 Br 2 complexes are reported for the first time. The important modifications observed in the Raman active modes of thiourea molecules demonstrate a very strong interaction between the Se(II) ion and the sulfur atom of the ligand. As ...
摘要: Laser Raman Spectroscopy is used to study catalysts : Co, Mo or Co-Mo supported on alumina. Well defined salts spectra are compared to those of these solids, which permits to establish superficial structures of cobalt, molybdenum or both....
Laser Raman spectra of oxide precursors of hydrodesulfurization catalysts containing 0-30% molybdenum trioxide and/or 0-10% cobalt oxide on two alumina and... J Medema,VHJD Beer,C Van Stam,... - J. Catal.; (United States) 被引量: 164发表: 1978年 Raman spectroscopic characterization of ga...
Raman bands ascribed to the component phases are observed in the spectra before test, while a phase transformation is detected after test.doi:10.1080/00387019808003304Carrazán, S. R. G.Martín, C.García-Ramos, J. V.Rives, V.Taylor & Francis GroupSpectroscopy Letters...
From the evolution of the crystalline peaks in the Raman spectra one can conclude that the impinging ions do not accommodate as defects in the lattice, but mostly displace the ions breaking the bonds and destroying the long range order. 展开 ...
Thus prepared, cobalt oxide based microstructural short-channel reactors were tested for n-nonane combustion and the catalyst surfaces were examined by in situμ-Raman spectroscopy and in situ infrared spectroscopy. The spectra collected at various temperatures were used in generalised two-dimensional ...
This is probably caused by competition between vanadium and molybdenum oxide (or vanadium and tungsten oxide) species for reaction with the alumina hydroxy groups, since the IR spectra showed that on addition of these metal oxides the same type of alumina hydroxy groups are consumed. The prese...