A5090206527- Electrocatalysts for Energy Conversion
- Fuel Cells and Related Materials
- Hybrid Renewable Energy Systems
- Mesoporous Materials and Catalysis
- Advanced battery technologies research
- Layered Double Hydroxides Synthesis and Applications
- Polyoxometalates: Synthesis and Applications
- Advancements in Solid Oxide Fuel Cells
- Catalytic Processes in Materials Science
- Conducting polymers and applications
- Zeolite Catalysis and Synthesis
- Metal-Organic Frameworks: Synthesis and Applications
- Nanocluster Synthesis and Applications
- Advanced Battery Technologies Research
- Clay minerals and soil interactions
- Supercapacitor Materials and Fabrication
- Hydrogen Storage and Materials
- Silicone and Siloxane Chemistry
- Iron oxide chemistry and applications
- Gas Sensing Nanomaterials and Sensors
- Aerogels and thermal insulation
- Machine Learning in Materials Science
- Covalent Organic Framework Applications
- Nanoporous metals and alloys
- Magnesium Oxide Properties and Applications
Yokohama National University
2017-2025
Waseda University
2009-2021
Tokoha Gakuen University
2019
The University of Tokyo
2011-2014
Bunkyo University
2012-2013
Hitachi (Japan)
2010
Kaolinite nanoscrolls, rolled kaolinite sheets with a tubular form, were prepared by one-step route in which intercalation of guest species and swelling solvent proceed at the same time. A methoxy-modified was exfoliated hexadecyltrimethylammonium chloride. The formation nanoscrolls proceeded only several alkyltrimethylammonium salts 1-hexadecyl-3-methylimidazolium Intercalation primary amines caused two-step separately. successful is ascribed to relatively weak interactions between head...
An Ag4 diamond is encapsulated by silicotungstate ligands in TBA8[Ag4(DMSO)2(γ-H2SiW10O36)2]⋅2 DMSO⋅2 H2O (Ag4; DMSO=dimethyl sulfoxide, TBA=tetra-n-butylammonium), which was obtained reaction of TBA4H4[γ-SiW10O36] with AgOAc an organic medium. Polyoxometalate (see picture) selectively catalyzes hydrolytic oxidation various silanes to the corresponding silanols high yields (72–96 %).
Layered double hydroxide nanoparticles (LDHNPs) with exceptionally small particle sizes are synthesized using a tripodal ligand of tris(hydroxymethyl)aminomethane (THAM). For example, LDHNP the average size 9.7 nm (denoted as LDH(10 nm), containing CO32– in interlayer), can be 2.0 M THAM solution. The 13C CP/MAS NMR and FTIR analyses show that is ligated to layer an alkoxide species. LDH l-lysine (buffering base) instead larger (47.9 nm) than nm). Therefore, reduction possibly explained by...
By the reaction of TBA(4)H(4)[γ-SiW(10)O(36)] (TBA = tetra-n-butylammonium) with AgOAc (OAc acetate) using dimethylphenylsilane as a reductant in acetone, unique polyoxometalate containing discrete octahedrally shaped [Ag(6)](4+) cluster, TBA(8)[Ag(6)(γ-H(2)SiW(10)O(36))(2)]·5H(2)O, could be synthesized, and molecular structure was determined.
For electrocatalysts of oxygen evolution reaction (OER), a new accelerated durability test (ADT) protocol is presented. The designed to closely mimic the fluctuations renewable energies. unit cycle current ADT represents “ON/OFF” operation mode. In “ON” step, electrolyzer operates under DC 0.6 A cm−2. “OFF” electrocatalyst subjected constant potential that clearly more cathodic than its OER onset (namely, 0.3, 0.5, and 0.7 V vs. RHE) for 10 or 60 s. transition from state occurs through...
Alkaline water electrolysis (AWE) has attracted considerable attention in recent years as a means to produce hydrogen. However, one problem associated with AWE is the increase overpotential at high current densities, which attributed bubble coverage on electrode surface. It therefore important understand generation behavior ultimately reduce overpotential. In this study, method was established measure resistance components from electrolytic reaction and coating separately based use of...
Cross-dehydrogenative coupling of various terminal alkynes and monohydrosilanes efficiently proceeded in the presence gold supported on OMS-2 (Au/OMS-2) using O2 as a oxidant, affording corresponding alkynylsilanes moderate to high yields (see picture). The observed catalysis was truly heterogeneous, catalyst could be reused at least ten times without significant loss its catalytic performance. As service our authors readers, this journal provides supporting information supplied by authors....
Cage-type mesoporous Pt with tunable large mesopores possessing smooth and rough pore surfaces were prepared selectively by the deposition of in absence presence a block copolymer hard-template, respectively.
Rigid but flexible: Gold nanoplates with highly ordered surface dimples (see picture) are deposited in the interstices of periodically arranged silica nanoparticles. The nanoparticles not only act as rigid templates to form or mesopores, also provide a flexible reaction field that allows anisotropic crystal growth gold simultaneously formed two-dimensional nanospace.
A new class of ordered silica-based materials has been prepared by hydrogen bond-directed assembly cage siloxanes modified with dimethylsilanol groups, providing a soft-chemical approach to crystalline silica molecularly designed architectures.
Abstract Parameter optimization is a long-standing challenge in various production processes. Particularly, powder film forming processes entail multiscale and multiphysical phenomena, each of which usually controlled by combination several parameters. Therefore, it difficult to optimize the parameters either numerical-model-based analysis or “brute force” experiment-based exploration. In this study, we focus on Bayesian method that has led breakthroughs materials informatics. Specifically,...
Abstract Fe, N-doped SrTiO3 was successfully synthesized using pyrazine carboxylic acid-metal complexes as the starting materials and exhibited high onset potential of 0.8 V vs. RHE for oxygen reduction reaction because formation high-quality active sites by Fe N doping, electron conduction paths carbon nanotubes.
Abstract Mesoporous basic Mg–Al mixed metal oxides (MMOs) with a high surface area and large pore size have been prepared through the assembly of monodispersed layered double hydroxide nanoparticles (LDHNPs) block copolymer templates. The particle sizes LDHNPs were mainly controlled by varying concentration tris(hydroxymethyl)aminomethane (THAM), which was used as stabilizing agent. micelles (Pluronic F127) assembled to form composite. composites calcined transform them into mesoporous MMOs...
Specific crystallographic planes of binary colloidal crystals consisting silica nanoparticles are two-dimensionally replicated on the surface gold nanoplates. The selectivity patterns is explained by geometrical characteristics as templates. with AlB2- and NaZn13-type structures fabricated from aqueous dispersions stoichiometrically mixed different sizes. stoichiometry precisely controlled basis a seed growth nanoparticles. Dimpled nanoplates formed two-dimensional between partially cleaved...
Abstract Brucite‐type layered metal hydroxides are prepared from diverse metallic elements and have outstanding functions; however, their poor intercalation ability significantly limits chemical designability the use of potentially ultrahigh surface areas unique properties as two‐dimensional nanosheets. Here, we demonstrate that tripodal ligands (RC(CH 2 OH) 3 , R=NH CH OH, or NHC H 4 SO H) useful “one‐size‐fits‐all” modifiers for direct synthesis hybrid hydroxide nanosheets with various...
Layered double hydroxide nanoparticles were synthesized <italic>via</italic> reconstruction, suppressing crystal growth with tripodal ligands.