A5087352572- Catalysis and Hydrodesulfurization Studies
- Catalytic Processes in Materials Science
- Nanomaterials for catalytic reactions
- Asymmetric Hydrogenation and Catalysis
- Catalysis and Oxidation Reactions
- Catalysts for Methane Reforming
- Catalysis for Biomass Conversion
- Surface Chemistry and Catalysis
- Electrocatalysts for Energy Conversion
- Zeolite Catalysis and Synthesis
- Mesoporous Materials and Catalysis
- Chemical Synthesis and Characterization
- Industrial Gas Emission Control
- Inorganic and Organometallic Chemistry
- Chemical Synthesis and Reactions
- Thermal and Kinetic Analysis
- Advanced Chemical Physics Studies
- Gas Sensing Nanomaterials and Sensors
- Ammonia Synthesis and Nitrogen Reduction
- Electron and X-Ray Spectroscopy Techniques
- Synthetic Organic Chemistry Methods
- Copper-based nanomaterials and applications
- Organometallic Complex Synthesis and Catalysis
- Iron oxide chemistry and applications
- Polyoxometalates: Synthesis and Applications
University of Hyogo
2012-2022
Shimane University
2003-2014
Sanyo-Onoda City University
2011
University of Shimane
1998-2009
Osaka University
1990-2004
Osaka Police Hospital
2004
St. Marianna University School of Medicine
2002
National Institute of Technology, Niihama College
1999-2002
Kurashiki University of Science and the Arts
1999
Tohoku University
1999
The surface characterisation of nickel boride (NiB) and phosphide (NiP) catalysts has been undertaken with X.p.s. Boron combined metal in NiB was found to donate electrons the metal, resulting electron rich whereas phosphorus bonded NiP accepted from causing deficient metal. Preparation methods (different solvent, precursor salt temperature) affected concentrations boron areas specific hydrogenation activities catalysts. for reactions increased increasing content catalysts, they decreased...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and characterization of highly dispersed cobalt oxide sulfide catalysts supported on silicaYasuaki Okamoto, Kozo Nagata, Toshinori Adachi, Toshinobu Imanaka, Kazuhiro Inamura, Toshiyuki TakyuCite this: J. Phys. Chem. 1991, 95, 1, 310–319Publication Date (Print):January 1991Publication History Published online1 May 2002Published inissue 1 January...
Abstract XPS techniques were used to clarify the state of supported cobalt catalysts. In order characterize Co2+ and Co3+, spin-orbit splitting 2p level, which is considered be affected by exchange interaction between unpaired 3d electrons electrons, was found very useful. The catalyst support investigated. determined: Co2O3 on SiO2, Co2O3+ CoAl2O4 γ-Al2O3, LaCoO3 La2O3. strength chemical as follows: La_2O_3>γ-Al_2O_3>SiO_2. This fact also confirmed reduction experiments.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInteraction chemistry between molybdena and alumina: infrared studies of surface hydroxyl groups adsorbed carbon dioxide on aluminas modified with molybdate, sulfate, or fluorine anionsYasuaki Okamoto Toshinobu ImanakaCite this: J. Phys. Chem. 1988, 92, 25, 7102–7112Publication Date (Print):December 1, 1988Publication History Published online1 May 2002Published inissue 1 December...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface structure and catalytic activity of molybdenum(VI) oxide/aluminum oxide catalysts in the hydrodesulfurization thiophene studied by x-ray photoelectron spectroscopyYasuaki Okamoto, Hiroyuki Tomioka, Yukihiro Katoh, Toshinobu Imanaka, Shiichiro TeranishiCite this: J. Phys. Chem. 1980, 84, 14, 1833–1840Publication Date (Print):July 1, 1980Publication History Published online1 May 2002Published inissue 1 July...
Abstract The XPS studies of chromia–alumina catalysts were carried out to elucidate the surface these catalysts. Photoreduction was found occur during measurements. Therefore, all spectra measured rapidly prevent any photoreduction. It that information about spin-orbit splitting Cr2P level is very useful for determining valence state chromium. chromium in calcined at 500 °C 5 h predominantly Cr6+ low chromia concentration However, Cr3+ phase appears higher content, and increases with...
A vapor phase synthesis of dimethyl carbonate (DMC) from carbon monoxide and methyl nitrite (MN) has been carried out over Pd/NaY catalysts at 383 K, DMC was produced in a good yield. The selectivity to >85% on the basis consumed CO or MN. by-products were oxalate, CO2, N2O, formate dimethoxymethane. catalytic properties investigated as function Pd content calcination temperature. It found that 1 wt.% calcined 473 K air optimum catalyst for present synthesis. oxidation state dispersion...
Co−Mo/B2O3/Al2O3 catalysts were prepared by a post-treatment of the calcined states with citric acid (CA) and tested for hydrodesulfurization (HDS) reaction thiophene. The characterized LRS, UV−visible spectroscopy, Mo K-edge EXAFS, TEM, NO adsorption capacity, surface area measurements. Catalysts obtained simultaneous impregnation also comparison. Sulfided chemical vapor deposition (CVD) technique using Co(CO)3NO. addition in more effectively increased catalytic activity capacity than did...
A Cu/ZrO2 (1 wt.% Cu) catalyst shows high activity for the NO–CO reaction, even at low temperature (100–200 °C). However, low-temperature is easily lost during prolonged reaction 250 °C. The of deactivated completely restored by NO treatment (1% in He) >250 °C or O2 (5% 500 addition iron (2 wt.%) to causes not only a dramatic increase but also stability against deactivation. An X-ray absorption fine structure (XAFS) study has been conducted reveal local and chemical state Cu species...