A5014278695- Catalytic Processes in Materials Science
- Catalysis and Oxidation Reactions
- Electrocatalysts for Energy Conversion
- Advancements in Battery Materials
- Nanomaterials for catalytic reactions
- Advanced Battery Materials and Technologies
- Fuel Cells and Related Materials
- Electron and X-Ray Spectroscopy Techniques
- Graphene research and applications
- Advanced Battery Technologies Research
- Synthetic Organic Chemistry Methods
- Asymmetric Synthesis and Catalysis
- Advanced battery technologies research
- Nanoporous metals and alloys
- Chemical Synthesis and Reactions
- Fusion materials and technologies
- Metal and Thin Film Mechanics
- Asymmetric Hydrogenation and Catalysis
- Catalysts for Methane Reforming
- Ion-surface interactions and analysis
- Catalytic Cross-Coupling Reactions
- Advanced Photocatalysis Techniques
- nanoparticles nucleation surface interactions
- Catalysis and Hydrodesulfurization Studies
- Synthesis and Reactions of Organic Compounds
Nagoya University
2016-2025
Institute for Sustainability
2025
Kumamoto University
2021
Gifu Pharmaceutical University
2018-2020
Gifu University
2020
Sanyo-Onoda City University
2020
University of Fukui
2015-2019
Hiroshima University
1989-2018
Yamaguchi University
2017
Tohoku University
1987-2016
The particle size effect of Pd nanoparticles supported on alumina with various crystalline phases methane combustion was investigated. Pd/θ, α-Al2 O3 weak metal-support interaction showed a volcano-shaped dependence the catalytic activity particles, and strongly interacted Pd/γ-Al2 increased size. Based structural analysis using CO adsorption IR spectroscopy spherical aberration-corrected scanning/transmission electron microscopy, phase due to fraction step sites surface. difference in site...
Carbon nitride nanosheets (NS-C3 N4 ) were found to undergo robust binding with a binuclear ruthenium(II) complex (RuRu') even in basic aqueous solution. A hybrid material consisting of NS-C3 (further modified nanoparticulate Ag) and RuRu' promoted the photocatalytic reduction CO2 formate media, conjunction high selectivity (approximately 98 %) good turnover number (>2000 respect loaded Ru complex). These represent highest values yet reported for powder-based system during under visible...
The hydrogen oxidation reaction (HOR) in alkaline electrolyte was conducted on carbon-supported Ru nanoparticles (Ru/C) of which size controlled the range from approximately 2 to 7 nm. HOR activity Ru/C normalized by metal surface area showed volcano shaped dependence particle with a maximum at 3 nm higher than commercially available Pt (ca. nm) supported carbon. structural analysis using Cs-corrected scanning transmission electron microscopy atomic resolution revealed unique change...
The effects of the Pd particle size and Al2O3 crystalline phase Pd/Al2O3 catalysts on CH4 combustion in presence H2O were investigated. According to X-ray absorption fine structure (XAFS) measurements, it was revealed that, during combustion, nanoparticles existed support as a PdO phase, while crystallinity depended size. On basis diffraction (XRD), amorphous particles with <7 nm exhibited low activity for combustion. In contrast, increased, larger (>7 nm) formed, which highly active...
The structure and function of the Ag cocatalyst in loaded Ga<sub>2</sub>O<sub>3</sub> photocatalysts for photocatalytic CO<sub>2</sub> reduction with water were investigated. It was found that around 1 nm sized clusters had strong interactions surface promoted formation bidentate formate species as reaction intermediate CO production.
We report a gold sub-nano cluster supported on Al2O3 catalyzed hydrogenation of 2-hydroxymethyl-5-furfural without furan ring and its opening reaction, which resulted in excellent conversion to 2,5-bis(hydroxymethyl)furan (>96% yield), Fig. 1(a).
The redox properties of supported Pd catalysts can directly affect their methane combustion activity. Here, the effect support on was elucidated using nanoparticles various metal oxides (θ-Al2O3, γ-Al2O3, ZrO2, CeO2, MgO, La2O3, TiO2, SnO2, and Nb2O5). To eliminate particle size morphology, uniform particles were synthesized in liquid phase. Interestingly, activity formed a volcano plot when plotted against oxide formation enthalpy (ΔfHM-O°) support. Combining X-ray photoelectron...
Dealloyed nanoporous metals have attracted much attention because of their excellent catalytic activities toward various chemical reactions. Nevertheless, coarsening mechanisms in these catalysts not been experimentally studied. Here, we report situ atomic-scale observations the structural evolution gold during CO oxidation. The catalysis-induced nanopore is associated with rapid diffusion atoms at chemically active surface steps and segregation residual Ag atoms, both which are stimulated...
Abstract The particle size effect of Pd nanoparticles supported on alumina with various crystalline phases methane combustion was investigated. Pd/θ, α‐Al 2 O 3 weak metal‐support interaction showed a volcano‐shaped dependence the catalytic activity particles, and strongly interacted Pd/γ‐Al increased size. Based structural analysis using CO adsorption IR spectroscopy spherical aberration‐corrected scanning/transmission electron microscopy, phase due to fraction step sites surface....
NASICON-type oxide Li1+xAlxTi2–x(PO4)3 (LATP) is expected to be a promising solid electrolyte (SE) for all-solid-state batteries (ASSBs) owing its high ion conductivity and chemical stability. However, interface properties with electrodes on the atomic scale remain unclear, but it crucial rational control of ASSBs performance. Herein, we focused LATP SE x = 0.17 investigated electron transfer behaviors at interfaces Li metal negative electrode LiCoO2 (LCO) positive via explicit models...
The structure–catalytic property relationships of Al2O3-supported Pt–Sn nanoparticles (Pt–Sn/Al2O3) in the dehydrogenation methylcyclohexane (MCH) were investigated by varying Sn/Pt ratios catalysts. initial activity and deactivation rate Pt–Sn/Al2O3 catalysts MCH decreased line with an increase ratio from 0 to 3. catalyst a 2 showed good activity, durability, toluene selectivity among series dispersion Pt was observed decrease ratio. Structural changes clusters intermetallic Pt3Sn PtSn also...
We report a high yield synthesis of single-wall boron nitride nanotubes (SWBNNTs) inside carbon (SWCNTs), nano-templated reaction, using ammonia borane complexes (ABC) as precursor. Transmission electron microscope (TEM), angle annular dark field (HAADF)-scanning TEM (STEM), energy loss spectra (EELS) and resolution EELS mapping aberration-corrected system clearly show the formation thin SWBNNTs SWCNTs. have found that SWBNNT is most ABC molecules decompose fuse to form BNNTs at temperature...
To enhance the hydrogenation activity of alumina supported Au (Au/Al2O3) catalyst for selective 5-hydroxymethylfurfural (HMF), an important biomass-derived aldehyde, Al2O3 support was modified with iron oxide (FeOx). The apparent catalytic FeOx/Al2O3 (Au/FeOx/Al2O3) catalysts increased as increase Fe loading up to 10 wt % (3–4 times higher than Au/Al2O3). When more %, decreased, and Au/α-Fe2O3 showed much lower Au/Al2O3. K-edge X-ray absorption fine structure (XAFS) spectra atomic scale...
Abstract Carbon nitride nanosheets (NS‐C 3 N 4 ) were found to undergo robust binding with a binuclear ruthenium(II) complex ( RuRu′ even in basic aqueous solution. A hybrid material consisting of NS‐C (further modified nanoparticulate Ag) and RuRu ′ promoted the photocatalytic reduction CO 2 formate media, conjunction high selectivity (approximately 98 %) good turnover number (>2000 respect loaded Ru complex). These represent highest values yet reported for powder‐based system during...
The individual synthesis of methanol and ethane from methane was investigated using a thermo-electrochemical cell in gas flow mode over the temperature range 150–200 °C. Methane directly oxidized at an anode consisting sub-10 nm Pt Fe particles. In electrolysis humidified methane, produced through formation active oxygen intermediates water vapor. unhumidified via dissociation C–H bonds, followed by dimerization resultant •CH3 radicals. However, rates for target products decreased with time...
Hydrogen storage and transportation are pivotal for a hydrogen- carbon-neutral society, yet current approaches face considerable limitations in efficiency cost, which typically related to catalyst design. Alloying trace amount of Pt on supported Co nanoparticles has emerged as an innovative design that leads substantial reduction the precious metal used catalytic hydrogenation toluene (TOL) methylcyclohexane (MCH), is important aspect hydrogen transportation. However, because difficulty...
The active sites of Pd/Al<sub>2</sub>O<sub>3</sub> catalysts for CO oxidations were identified by investigating the dependence oxidation activities on surface structure and morphology Pd nanoparticles.