研究领域

Catalytic Chemistry

Our main objective is to understand chemical reactions accelerated by solid catalysts such as zeolites and intermetallic compounds. Zeolite is a crystalline aluminosilicate or aluminophosphate having regularly ordered nano-size holes (pores). Only molecules smaller than the size of the pore opening (0.3-1 nm) can enter inside the crystal. By using its cation-exchange property, it is possible to obtain acidic zeolites with acid strength comparable to the concentrated sulfuric acid, and also to obtain zeolites with isolated metal cations and metal particles. These zeolites catalyze a variety of chemical reactions such as isomerization, cracking, dimerization, alkylation etc. Intermetallic compounds have particular crystal structures different from those of pure metals. They exhibit unique bulk properties, superconductivity, hydrogen absorption ability, etc. We have revealed that some intermetallic compounds have very unique catalytic properties compared with their component pure metals. XRD, XPS, IR, etc. are utilized to characterize catalysts in order to find out what determines the performance of those catalysts for the purpose to achieve more active and selective catalysts. Research Topics : Preferential oxidation of CO in hydrogen on fine particles of intermetallic compound catalysts. Formation of nano particles of intermetallic compounds inside the pores of mesoporous silica and their catalytic properties. Selective hydrogenation of acetylene into ethylene on fine particles of intermetallic compound catalysts. Stereo selective hydrogenation of diphenylacetylene inside the pores of metal-loaded zeolite catalysts. Formation of propylene through the cracking of naphtha on acidic zeolite catalysts. Formation of isobutene from butane on metal-loaded zeolite catalysts. Message from the LaboratoryOur laboratory is managed with a relatively free atmosphere. Daily research experiments are carried out based on the students' idea though undergraduate students are first assisted by graduate ones for the detailed experimental procedures. They will find it important to consider their own research by themselves before the completion of their Master's theses.

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"Mechanistic Study on Aerobic Oxidation of Amine over Intermetallic Pd3Pb: Concerted Promotion Effects by Pb and Support Basicity", S. Furukawa, A. Suga and T. Komatsu, ACS Catal., 5, 1214 – 1222 (2015). doi: 10.1021/cs501695m "Efficient Catalytic System for Synthesis of Trans-Stilbene from Diphenylacetylene Using Rh-Based Intermetallic Compounds", S. Furukawa, A. Yokoyama and T. Komatsu, ACS Catal., 4, 3581 – 3585 (2014). doi: 10.1021/cs500947d "Bifunctional Catalytic System Effective for Oxidative Dehydrogenation of 1-Butene and n-Butane Using Pd-Based Intermetallic Compounds", S. Furukawa, M. Endo and T. Komatsu, ACS Catal., 4, 3533 – 3542 (2014). doi: 10.1021/cs500920p "Study on the Hydrogen Activation Properties of Ni-Based Intermetallics: Relationship between Reactivity and Electronic State", S. Furukawa, K. Ehara, K. Ozawa and T. Komatsu, Phys. Chem. Chem. Phys., 16, 19828-19831 (2014). doi: 10.1039/C4CP01514B "Chemoselective Hydrogenation of Nitrostyrene to Aminostyrene over Pd- and Rh-based Intermetallic Compounds", S. Furukawa, Y. Yoshida and T. Komatsu, ACS Catal., 4, 1441 - 1450 (2014). doi: 10.1021/cs500082g "Highly Efficient Aerobic Oxidation of Various Amines Using Pd3Pb Intermetallic Compounds as Catalysts", S. Furukawa, A. Suga and T. Komatsu, Chem. Commun., 50, 3277 - 3280 (2014). doi: 10.1039/C4CC00024B "Catalytic Properties of Pt-based Intermetallic Compounds in dehydrogenation of cyclohexane and n-butane", S. Furukawa, A. Tamura, K. Ozawa and T. Komatsu, Appl. Catal. A: Gen., 469, 300 - 305 (2014). doi: 10.1016/j.apcata.2013.10.012 "Preparation of Alumina-Supported Intermetallic Compounds", S. Furukawa, K. Ozawa and T. Komatsu, RSC Adv., 3, 23269 - 23277 (2013). doi: 10.1039/C3RA43163K "PtCu Intermetallic Compound Supported on Alumina Active for Preferential Oxidation of CO in Hydrogen", T. Komatsu, M. Takasaki, K. Ozawa, S. Furukawa and A. Muramatsu, J. Phys. Chem. C, 117, 10483 - 10491 (2013). doi: 10.1021/jp4007729 "Synthesis of trans-stilbene through the hydrogenation of diphenylacetylene", T. Komatsu, K. Takagi and K. Ozawa, Catal. Today, 164, 143 - 147 (2011). doi: 10.1016/j.cattod.2010.10.089 "Preparation and catalytic properties of fine particles of Pt-Ge intermetallic compound formed inside the mesopores of MCM-41", T. Komatsu, K. Sou and K. Ozawa, J. Mol. Catal. A: Chemical, 319, 71 - 77 (2010). doi: 10.1016/j.molcata.2009.12.002 "Ru-Ti intermetallic catalysts for the selective hydrogenation of crotonaldehyde", J. Ruiz-Martinez, Y. Fukui, T. Komatsu and A. Sepulveda-Escribano, J. Catal., 260(1), 150 - 156 (2008). doi: 10.1016/j.jcat.2008.09.024 "Selective hydrogenation of acetylene into ethylene on fine particles of Pd3Bi intermetallic compound supported on silica", T. Komatsu and T. Gorai, Abst. 14th Intern. Congr. Catal., OB31 (Seoul, 2008) p. 69. "Preparation and catalytic properties of uniform particles of Ni3Ge intermetallic　compound formed inside the mesopores of MCM-41", T. Komatsu, T. Kishi and T. Gorai, J. Catal., 259(2), 174 - 182 (2008). doi: 10.1016/j.jcat.2008.08.001 "Pt3Co and PtCu intermetallic compounds: Promising catalysts for preferential oxidation of CO in excess hydrogen", T. Komatsu and A. Tamura, J. Catal., 258(2), 306 - 314 (2008). doi: 10.1016/j.jcat.2008.06.030 "Dehydroisomerization of butane into isobutene on Pt-Sn intermetallic compounds supported on H-SAPO-11", T. Komatsu and H. Ikenaga, J. Catal., 241(2), 426 - 434 (2006). doi: 10.1016/j.jcat.2006.05.018 "CO2 reforming of methane on Ni- and Co-based intermetallic compound catalysts", T. Komatsu and T. Uezono, J. Jpn. Petrol. Inst., 48(2), 76 - 83 (2005). doi: 10.1627/jpi.48.76