A5103448740- Catalytic Processes in Materials Science
- Electrocatalysts for Energy Conversion
- Catalysis and Oxidation Reactions
- Fuel Cells and Related Materials
- Catalysts for Methane Reforming
- Graphene research and applications
- Advanced battery technologies research
- Advanced Photocatalysis Techniques
- Carbon Nanotubes in Composites
- Supercapacitor Materials and Fabrication
- Mesoporous Materials and Catalysis
- Catalysis and Hydrodesulfurization Studies
- Zeolite Catalysis and Synthesis
- Conducting polymers and applications
- Oxidative Organic Chemistry Reactions
- TiO2 Photocatalysis and Solar Cells
- Nanomaterials for catalytic reactions
- Cardiac Valve Diseases and Treatments
- Transition Metal Oxide Nanomaterials
- Advancements in Battery Materials
- Copper-based nanomaterials and applications
- Advancements in Solid Oxide Fuel Cells
- Fiber-reinforced polymer composites
- Electrochemical Analysis and Applications
- CO2 Reduction Techniques and Catalysts
Doshisha University
2016-2025
Hokkaido University
2022-2025
Hokkaido University Hospital
2023-2024
Kushiro City General Hospital
2023
Sapporo Science Center
2023
Kyocera (Japan)
2021
Kyushu University
2007-2016
Japan Science and Technology Agency
2013-2015
Graduate School USA
2014
Tokyo Institute of Technology
1999-2008
Avoiding a bang! Electrochemical reduction of O2 in an H2/O2 fuel cell with three-phase boundary (gaseous O2, aqueous electrolyte, solid cathode) produces concentrated solutions H2O2. Even air can serve as the oxygen source.
Co-catalysts play an important role in photocatalytic water splitting. The co-catalyst is generally deposited the form of nanoparticles on catalyst surface, and believed to provide oxidation reduction sites. However, minimum size a that can function as reaction site detailed local environment centers are not yet fully understood. Here, we show even isolated single-atom Rh dopants two-dimensional titanium oxide crystals effectively act co-catalysts for water-splitting reaction. At optimal...
Carbon nanotube-supported Pt catalysts (Pt/CNT) for the cathode in a polymer electrolyte fuel cell (PEFC) were covered with silica layers using tetraethoxysilane (TEOS) and also methyltriethoxysilane (MTEOS) to improve catalyst durability under severe conditions at PEFC cathode. Both silica-coated Pt/CNT had excellent potential cycling between 0.6 1.0 V (vs RHE) N2-purged 0.1 M HClO4 electrolyte, while without coating was significantly deactivated due an increase of metal particle size....
Catalytic performance of Co catalysts supported on different supports (MgO, Al2O3, SiO2, and TiO2) for the formation carbon nanofibers through methane decomposition was investigated. activity life at 773 K strongly depended type catalytic supports; i.e., performances Co/Al2O3 Co/MgO were superior to those Co/TiO2 Co/SiO2. All produced with relatively uniform diameters (10−30 nm) reaction irrespective kind supports, although an average crystallite size metal these catalysts. These results...
Carbon nanotube (CNT)-supported Pt metal nanoparticles were covered with silica layers by utilizing the successive hydrolysis of 3-aminopropyl-triethoxysilane and tetraethoxysilane on CNTs hydroxide. The CNT-supported particles (denoted as SiO2/Pt/CNT) used electrocatalysts. SiO2/Pt/CNT electrocatalysts showed a high stability for repeated potential cycling experiment, whereas Pt/CNT deactivated seriously experiment because growth in size. prevent dissolution well migration agglomeration...
Abstract The hydrogen evolution reaction using semiconductor photocatalysts has been significantly improved by cocatalyst loading. However, there are still many speculations regarding the actual role of cocatalyst. Now a photocatalytic pathway is reported on site TiO 2 nanosheets doped with Rh at Ti sites as one‐atom cocatalysts. A hydride species adsorbed dopant was confirmed experimentally intermediate state for evolution, which consistent results density functional theory (DFT)...
Direct conversion of methane (CH4) into valuable chemicals with low-energy input is an important goal in the sustainable chemical industry. Herein, we report a photoelectrochemical activation CH4 gas phase under visible light irradiation at room temperature. The proof-of-concept study revealed that homocoupling to form ethane (C2H6) high selectivity 54% was induced by photogenerated holes over tungsten trioxide (WO3) gas-diffusion photoanode coated proton-conducting ionomer presence water...
The addition of Pd into Ni/SiO2 improved the catalytic activity and life for methane decomposition hydrogen carbon nanofibers. Thus, Pd-added (denoted as Pd−Ni/SiO2) was characterized by measuring Ni K-edge XANES EXAFS TEM images. Methane on or Pd/SiO2 formed nanofibers with metal particles at tips them. in transformed carbides deactivation stage catalyst decomposition. were fragmented smaller ones during On other hand, Pd−Ni/SiO2 produced different shapes than those Pd/SiO2, i.e., branched...
Multiwalled carbon nanotube (CNT)-supported Pt nanoparticles (Pt/CNT) were covered with silica layers by successive hydrolysis of 3-aminopropyl-triethoxysilane and tetraethoxysilane on CNTs metal precursors, followed reduction hydrogen. The Pt/CNT was used as a cathode catalyst for proton exchange membrane fuel cell (PEMFC). activity the oxygen reaction in single-cell PEMFC similar to that Pt/CNT, spite uniform coverage layers, indicating did not appreciably decrease catalytic activity. In...
The structural analyses of Fe, Mn−SO42-/ZrO2 (FMSZ), Fe−SO42-/ZrO2 (FSZ), (MSZ), and Fe−Mn/ZrO2 (FMZ) were carried out by means XAFS, XRD, Raman spectroscopy. Local structure around Fe Mn each catalyst, which at a working state for n-butane isomerization in vacuo, studied situ XAFS. valence the atom all catalysts was invariantly trivalent. Coordination environment quite similar to other. atoms are present inside bulk phase ZrO2, system forms interstitial-type solid solution located center...
Knallgasfrei und ökonomisch: Die elektrochemische Reduktion von O2 in einer H2/O2-Brennstoffzelle mit Dreiphasen-Grenzfläche (gasförmiges O2, wässrige Elektrolytlösung, feste Kathode) liefert konzentrierte H2O2-Lösungen. Luft kann bei diesem Verfahren als Sauerstoffquelle dienen.