Wan Huilin

Nano-lanthanum Oxyhalide Prepared by Nonaqueous Sol-Gel for Oxidative Coupling of Methane

National Basic Research Program of China (973 Program)[2010CB732303]; National Natural Science Foundation of China[21033006, 20923004, 20373054]

ELECTRON SPECTROSCOPIC STUDY OF ADSORPTION OF METHANE ON TITANIUM-DIOXIDE SURFACES

The chemisorption of methane has been investigated on titanium surface, the polycrystalline TiO2 film surface and the TiO2(100) surface with and without defects (oxygen vacancies).It has been found that the activation of C-H bonds depends on surface oxygen species. The different adsorption behavior between methane adsorption and methane-oxygen coadsorption, together with the different adsorption results on the TiO2(100) surface with and without defects, shows that the electrophilic oxygen species on the surface are active species for the activation of C-H bonds of methane. The temperature dependence of adlayer provides possible evidence for electrophilic oxygen species reacting with CHx on the surface.

Reaction Mechanism for Partial Oxidation of Methane to Synthesis Gas over Rh/SiO2 Catalyst

National Basic Research Program of China (973 program) [2010CB732303]; National Natural Science Foundation of China [20873111, 20923004, 21033006]; Program for Innovative Research Team of the Ministry of Education of China [IRT1036]; Key Scientific Project of Fujian Province [2009HZ0002-1]

Highly-Dispersed NiO Nanoparticles on SBA-15 for Oxidative Dehydrogenation of Propane to Propylene

National Key Basic Research Program of China (973) [2010CB732303]; National Natural Science Foundation of China [21173173, 21073148, 21033006]; Program for Innovative Research Team of the Ministry of Education of China [IRT1036]; Key Scientific Project of Fujian Province, China [2009HZ0002-1]

丙烷选择氧化制丙烯醛MoBiTeO/SiO 2 催化剂中Te组分的作用

A series of MoBiTeO/SiO2 catalysts with different Te contents was prepared by impregnation method. Effect of Te on the catalysts′structure, acidity and catalytic performance for selective oxidation of propane to acrolein was investigated by XRD, Raman, XPS, NH3-TPD, FT-IR, and performance evaluation techniques. The results indicated that by forming Mo—O—Te bond with the Mo species, tellurium component in the catalyst improved the dispersion of Mo oxide species that would be favorable to the formation of isolate active sites on the catalysts. Besides, Te could be the centers for α-H abstraction of propene and O-insertion to allyl species. So, the addition of Te to MoBiO/SiO2 catalyst promoted the acrolein selectivity greatly. However, the addition of tellurium also could contribute the formation of B acid sites in MoBiTeO/SiO2 catalysts that had been proved to be harmful to the generation of acrolein. Therefore, there existed an optimal scale for the amount of Te-content in the MoBiTeO/SiO2 catalysts. When the nTe/nMo ratio was 0.05-0.1, the catalyst showed the best catalytic performance.

Oxidative Dehydrogenation of Propane to Propylene over Mesoporous Alumina Supported Ni-Co Oxide Catalysts

National Key Basic Research Program of China (973) [2010CB732303]; National Natural Science Foundation of China [21173173, 21073148, 21033006]; Program for Innovative Research Team of the Ministry of Education of China [IRT1036]; National Foundation for Fostering Talents of Basic Science, China [J1030415]; Key Scientific Project of Fujian Province, China [2009HZ0002-1]

Influence of Ni Chemical States on the Partial Oxidation Mechanism of Methane: An Energetics Analysis

National Natural Science Foundation of China[21033006, 20923004]; Natural Science Foundation of Fujian Province, China[2007J0168]; National Key Basic Research Program of China (973)[2010CB732303]

Catalytic site of nitrogenases and its chemical simulations

Nitrogenase catalyzes the reduction of dinitrogen to ammonia in the process of biological nitrogen fixation. In the past few decades, its catalytic mechanism and chemical simulation have been widely studied. The high resolution X-ray structural analysis of the MoFe protein in nitrogenase reveals the iron molybdenum cofactor (FeMo-co) as a cage structure, MoFe7S9C( R -homocit). The molybdenum atom is coordinated by three sulfur atoms, a nitrogen atom from histidine residue and two oxygen atoms from R -homocitrate. Recently, the model has been modified as a protonated structure of MoFe7S9C( R -Hhomocit). Homocitrate and imidazole sidechain may play important roles in delivering proton and stabilizing the MoFe7S9C cluster in the process of N2 reduction. However the mechanism of N2 reduction remains unclear. In this review, the chemistry of molybdenum with homocitrate and imidazole is discussed, including the iron molybdenum sulfur complexes, which will be helpful to understand the coordination environment of molybdenum atom in iron molybdenum cofactor.

Catalytic Behaviors and Stability of Aerogel Silica-Supported Ni Catalysts for the Partial Oxidation of Methane into Synthesis Gas

National Key Basic Research Program of China (973) [2010CB732303]; National Natural Science Foundation of China [21033006, 21373169]; Program for Changjiang Scholars and Innovative Research Team in Universities, China [IRT1036]

Synthesis and Catalytic Performances of Mesoporous CeNiO Catalysts for the Oxidative Dehydrogenation of Propane to Propene

National Key Basic Research Program of China (973)[2010CB732300]; National Natural Science Foundation of China[21073148, 21033006, 20803060]; Natural Science Foundation of Fujian Province, China[2009J01038]