A5040630335- Anodic Oxide Films and Nanostructures
- Electrocatalysts for Energy Conversion
- Corrosion Behavior and Inhibition
- Catalytic Processes in Materials Science
- Zeolite Catalysis and Synthesis
- Fuel Cells and Related Materials
- Catalysis and Oxidation Reactions
- Advancements in Solid Oxide Fuel Cells
- Catalysis and Hydrodesulfurization Studies
- Advanced Photocatalysis Techniques
- Surface Modification and Superhydrophobicity
- TiO2 Photocatalysis and Solar Cells
- Catalysis for Biomass Conversion
- Advanced battery technologies research
- Concrete Corrosion and Durability
- Magnesium Alloys: Properties and Applications
- Semiconductor materials and devices
- Hydrogen embrittlement and corrosion behaviors in metals
- Electrochemical Analysis and Applications
- Metal and Thin Film Mechanics
- Transition Metal Oxide Nanomaterials
- Electronic and Structural Properties of Oxides
- Polymer crystallization and properties
- Mesoporous Materials and Catalysis
- Molecular Junctions and Nanostructures
Tottori University
2016-2025
Tottori College
2018-2020
Hokkaido University
2011-2018
Graduate School USA
2011-2018
Sapporo Science Center
2014-2016
Faculty (United Kingdom)
2014
Engineering (Italy)
2014
Osaka University
2007-2011
Japan Science and Technology Agency
2007
Industrial Research Institute
1988
The work functions for atomic-level regulated (HF-treated and annealed) n-TiO2 (110) (100) surfaces with a clear step terrace structure, together photoetched ones, were investigated scanning auger microprobe (SAM) using 0.05 wt % Nb-doped TiO2. Analysis of the threshold region secondary electron spectra has revealed that function TiO2 surface (about 4.13 eV) is 0.07 eV lower than surface. photoetching in M H2SO4 decreased by eV, but did not cause any change. Both results harmony previously...
Here, we report remarkable oxygen evolution reaction (OER) catalytic activity of brownmillerite (BM)-type Ca2 FeCoO5 . The OER this oxide is comparable to or beyond those the state-of-the-art perovskite (PV)-catalyst Ba0.5 Sr0.5 Co0.8 Fe0.2 O3-δ (BSCF) and a precious-metal catalyst RuO2 , emphasizing importance characteristic BM structure with multiple coordination environments transition metal (TM) species. Also, clearly advantageous in terms expense/laboriousness material synthesis. These...
This study demonstrates the fabrication of hierarchical surfaces with super-repellency even for low-surface-tension liquids, including octane (surface tension 21.7 mN m−1). Dual-pore were prepared by a combination practical wet processes on an aluminium substrate: chemical etching, anodizing, and organic monolayer coating. The size larger pores formed etching is controlled concentration HCl in CuCl2/HCl solution. etched then anodized to introduce nanopores, followed pore-widening treatment...
The growth behavior of nanoporous anodic films on carbon steel containing 0.213 mass% has been examined. were grown by anodizing in an ethylene glycol (EG) electrolyte 0.1 mol dm−3 NH4F and 0.5 H2O. contains carbide precipitates with sizes the range 50–800 nm. film formed phase grew more slowly was chemically soluble during anodizing, resulting submicrometer pits film. morphology α-Fe matrix resembled those iron. Heat treatment anodized specimens caused transformation fluoride-containing...
SnO was reduced to metallic Sn particles while maintaining its shape during CO 2 RR, whereas and tin oxyhydroxide dissolved in the electrolyte at pH 7, subsequently forming nanoparticles via reductive deposition from cations.
Abstract Cobalt‐loaded MFI zeolite showed distinct activity for direct methylation of benzene with methane into toluene. High was found at around 0.6 Co/Al molar ratio. Incorporation carbon from the methyl group toluene confirmed isotope tracer experiments and mass spectroscopy. Ammonia infrared‐mass spectroscopy temperature‐programmed desorption, transmission electron microscopy, X‐ray absorption near edge extended fine structure indicated that Lewis acidic divalent (+II oxidation state) Co...
Resistive switching gallium oxide thin films with tailored oxygen deficiency and valence state were fabricated by rf cosputtering of Ga<sub>2</sub>O<sub>3</sub> Cr.
This work reports the importance of nanopore morphology in designing super liquid-repellent submicropillar/nanopore hierarchical surfaces. The surfaces were fabricated using a combined process oblique angle sputter deposition aluminum with subsequent anodizing, and coated fluorinated alkyl phosphate layer to reduce surface energy. size nanopores, interpore distance, porosity anodic films on submicrometer pillars controlled by varying anodizing pore-widening conditions. present study...
This paper reports the formation of hierarchically structured aluminum mesh by a combination simple chemical etching and anodizing. The former introduced micrometer-sized etch pits, latter produced nanopores order 10 nm on with 150 μm openings. Coating monolayer fluoroalkyl phosphate made surface superoleophobic to practically any liquid, including hexane tension as low 18.4 mN m–1. hierarchical triple ∼100 μm/∼1 μm/∼10 pore morphology improved superoleophobicity compared dual ∼1 structures....
A hydrogen membrane fuel cell (HMFC) consisting of a Pd solid anode, 1 μm thick BaCe0.8Y0.2O3−δ thin-film electrolyte, and La0.6Sr0.4Co0.2Fe0.8O3 cathode was examined. single-phase thin film successfully deposited by radio frequency cosputtering with BaCe0.8Y0.2O3 Ce0.9Y0.1O2 double targets, as checked X-ray diffraction, transmission electron microscopy, wavelength dispersive analysis. The maximum power density reached 1.05 W cm–2 at 600 °C, this value higher than the champion data recently...
We previously found that a TiO2 surface was atomically roughened with the progress of photo-oxidation reaction water. Considering fact local structures affect photocatalytic activity, activity may be changed by roughening. In this paper, activities for oxygen evolution and flat single-crystal electrodes in acidic alkaline solutions were investigated. low pH (acidic condition) aqueous solution, onset potential photoevolution shifted toward negative side 0.20–0.15 V from TiO2, whereas shifts...
Electrocatalytic activity for the four-electron-transfer oxygen reduction reaction (ORR) was examined with perovskite-type La0.7Sr0.3Mn1–xNixO3—δ (x = 0–0.5) compounds in concentrated KOH. Electrochemical measurements by means of a rotating ring–disk electrode technique revealed that 10% substitution Mn Ni atoms significantly improved ORR whereas further decreased catalytic performance. Moreover, La0.7Sr0.3Mn0.9Ni0.1O3—δ could achieve ideal electron number (∼4) without aid carbon additives,...
The influences of acidity and textural properties the zeolites on activity selectivity were revealed in tetralin conversion.
In this study, aluminosilicate sol-gel coatings were deposited on Type 430 stainless steel by multiple spin casting cycles. Amorphous coatings, 65 nm thick, prepared from precursor solutions with 50, 100, and 500 mmol dm−3 total concentrations of aluminum silicon species (molar ratio Al/Si = 1/4) 10, 5, 1 cycles, respectively. Although the obtained had a similar composition molar 25/75, increased density formed reducing concentration solution. The pitting potentials coated steels, measured...