A5032289572- CO2 Reduction Techniques and Catalysts
- Advanced Photocatalysis Techniques
- Carbon dioxide utilization in catalysis
- Electrocatalysts for Energy Conversion
- Copper-based nanomaterials and applications
- Catalytic Processes in Materials Science
- ZnO doping and properties
- X-ray Diffraction in Crystallography
- Advanced battery technologies research
- Crystallization and Solubility Studies
- Astro and Planetary Science
- Semiconductor materials and devices
- Metal-Organic Frameworks: Synthesis and Applications
- Catalysis and Oxidation Reactions
- Ionic liquids properties and applications
- Ammonia Synthesis and Nitrogen Reduction
- Elevator Systems and Control
- Radioactive element chemistry and processing
- Electronic and Structural Properties of Oxides
- Silicon Carbide Semiconductor Technologies
- Metal complexes synthesis and properties
- Photonic and Optical Devices
- Thin-Film Transistor Technologies
- Radical Photochemical Reactions
- 3D IC and TSV technologies
Toyota Central Research and Development Laboratories (Japan)
2016-2025
Oji General Hospital
2025
University of Tsukuba
2020-2024
Kyushu University
1989-2024
The University of Tokyo
2016-2022
Tokyo Institute of Technology
1973-2022
Toyota Motor Corporation (Switzerland)
2010-2021
Tokyo Metropolitan University
2019-2021
Fujikura (Japan)
2018-2020
California Institute of Technology
2020
Photoelectrochemical reduction of CO(2) to HCOO(-) (formate) over p-type InP/Ru complex polymer hybrid photocatalyst was highly enhanced by introducing an anchoring into the polymer. By functionally combining with TiO(2) for water oxidation, selective photoreduction achieved in aqueous media, which H(2)O used as both electron donor and a proton source. The so-called Z-scheme (or two-step photoexcitation) system operated no external electrical bias. selectivity production >70%, conversion...
Lights, CO2, action! Selective CO2 reduction by hybrid photocatalysts such as a p-type semiconductor and ruthenium complex catalyst (see picture) was induced visible light. The quantum efficiency for HCOOH production 1.9 % at 405 nm. For electron transfer, it is essential that the potential of conduction band minimum more negative than catalyst.
Mononuclear iridium(III) terpyridine (tpy) 2-phenylpyridine (ppy) complexes [Ir(tpy)(R-ppy)Cl] (R=H, Me, CF3) can act as efficient and selective CO2 reduction photocatalysts. The reaction is driven using visible light in a homogeneous solution, even H2O mixed solution. most photocatalyst [Ir(tpy)(Me-ppy)Cl], for which the turnover CO was over 50 quantum yield 0.21 at 480 nm.
Solar formate production from CO2 and H2O was achieved with no external electrical bias by combining an InP/[RuCP] semiconductor/metal-complex hybrid photocathode a reduced SrTiO3 (r-STO) photoanode. The conversion efficiency solar to chemical energy improved 0.03 0.14% compared previous system utilizing TiO2 Stimulated electron transfer the photoanode is main cause for observed improvement, due enlarged difference in band-energy position between r-STO InP. Since showed high oxidation...
Abstract Molecular metal complex catalysts are highly tunable in terms of their CO 2 reduction performance by means flexible molecular design. However, have challenges structural stability and it has not been possible to synthesize high-value-added C 3 products due inability perform C–C coupling. Here we show a reaction catalysed Br-bridged dinuclear Cu(I) that produces H 7 OH with high robustness during the reaction. The coupling mechanism was analysed experimental operando surface-enhanced...
For many fiber applications, the Brillouin gain spectrum (BGS) contains important information including frequency shift, spontaneous linewidth, and coefficient. This paper is first, to best of our knowledge, present an accurate numerical simulation BGS in single-mode fibers. The simulated measured were good agreement. Through repeated simulations, we revealed a tendency peak coefficient that determines stimulated scattering threshold.
Photoelectrochemical reduction of CO(2) to HCOO(-) was successfully achieved by a p-type InP photocathode modified with an electropolymerized ruthenium complex in water. This technique decreased the required applied potential for utilizing solar energy. The carbon and proton sources were identified tracer experiment be H(2)O, respectively.
A solar to chemical energy conversion efficiency of 4.6% was demonstrated in CO<sub>2</sub> photoreduction formate utilizing water as an electron donor under simulated light irradiation a monolithic tablet-shaped device.
Highly selective photoelectrochemical CO(2) reduction (>80% selectivity) in water was successfully achieved by combining Cu(2)ZnSnS(4) (CZTS) with a metal-complex electrocatalyst. CZTS, sulfide semiconductor that possesses narrow band gap and consists of earth-abundant elements, is demonstrated to be candidate photoabsorber for hybrid photocatalyst.
A highly efficient tetradentate PNNP-type Ir photocatalyst, Mes-IrPCY2, was developed for the reduction of carbon dioxide. The photocatalyst furnished formic acid (HCO2H) with 87% selectivity together monoxide to achieve a turnover number 2560, which is highest among CO2 photocatalysts without an additional photosensitizer. Mes-IrPCY2 exhibited outstanding photocatalytic activity in presence sacrificial electron source 1,3-dimethyl-2-phenyl-2,3-dihydro-1H-benzo[d]imidazole (BIH)...
A hybrid photocathode that consists of a ruthenium complex catalyst and p-type semiconductor composed earth-abundant elements, N,Zn-codoped Fe2O3, with multiheterojunction structure (TiO2/N,Zn-Fe2O3/Cr2O3) was developed for the reduction CO2 in aqueous solution application an electrical bias under simulated solar light irradiation. The TiO2 layer prevents contact between N,Zn-Fe2O3 electrolyte, so dissolution by photoelectrochemical (PEC) self-reduction cannot occur. Both Cr2O3 significantly...
Developing a system for the production of organic chemicals via CO2 reduction is an important area research that has potential to address global warming and fossil fuel consumption. In addition, promotes carbon source recycling. Solar energy largest exploitable resource among renewable resources, providing more Earth per hour than total consumed by humans in 1 year. This report describes advantages disadvantages available H2O oxidation photocatalysts conjugation photocatalytic with creation...
Electrocatalytic CO2 reduction over a Mn-complex catalyst in an aqueous solution was achieved at very low energy with combination of multiwalled carbon nanotubes (MWCNTs) and K+ cations. Although the bare did not function as solution, combined Mn-complex/MWCNT cathode promoted electrocatalytic overpotential 100 mV where neither MWCNTs nor were catalytically active. The produced CO constant rate for 48 h current density greater than 2.0 mA cm–2 −0.39 V (vs RHE). electron accumulation...
ConspectusThe synthesis of organic chemicals from H2O and CO2 using solar energy is important for recycling through cyclical use chemical ingredients produced or molecular carriers based on CO2. Similar to photosynthesis in plants, the molecules are reduced by electrons protons, which extracted molecules, produce O2. This reaction uphill; therefore, stored as bonding molecules. artificial photosynthetic technology mimicking green vegetation should be implemented a self-standing system...
The photocatalytic reduction of carbon dioxide (CO
Hybrid photocatalysts consisting of a ruthenium complex and p-type photoactive N-doped Ta2O5 anchored with an organic group were successfully synthesized by direct assembly method. The photocatalyst phosphonate exhibited excellent photoconversion activity CO2 to formic acid under visible-light irradiation respect the reaction rate stability.
Einkernige Iridium(III)-Terpyridin(tpy)-2-Phenylpyridin(ppy)-Komplexe ([Ir(tpy)(R-ppy)Cl]) (R=H, Me, CF3) sind effiziente und selektive Photokatalysatoren für die CO2-Reduktion. Die Reaktion gelingt mit sichtbarem Licht in homogener sogar wasserhaltiger Lösung. Der effizienteste Photokatalysator ist [Ir(tpy)(Me-ppy)Cl], dem der CO-Umsatz mehr als 50 betrug Quantenausbeute bei 480 nm 0.21 war. As a service to our authors and readers, this journal provides supporting information supplied by...
Abstract The photochemistry of fac ‐[Re(bpy)(CO) 3 Cl] ( 1 a ; bpy=2,2′‐bipyridine) initiated by irradiation using <330 nm light has been investigated. Isomerization proceeded in THF to give the corresponding mer‐ isomer b . However, presence small amount MeCN, main product was CO‐ligand‐substituted complex OC ‐6‐24)‐[Re(bpy)(CO) 2 Cl(MeCN)] c bpy=2,2′‐bipyridine). In two isomers, and its ‐6‐34) form ), were produced. Only thermally isomerized produce ‐6‐44) A detailed investigation led...
A powdered Z-scheme system for the photocatalytic water splitting reaction under visible light irradiation was successfully demonstrated utilizing a combination of metal-complex catalyst, reduced graphene oxide (RGO), and semiconductor photocatalysts. Ru-complex electrocatalyst, [Ru (2,2′-bipyridine)(4,4′-diphosphonate-2,2′-bipyridine)(CO)2]2+, linked with SrTiO3 : Rh (Rh: 4 at%) as H+ reduction photocatalyst coupled BiVO4 oxidation RGO solid-state electron mediator. H2 O2 evolved...
Ca-intercalation has enabled superconductivity in graphene on SiC. However, the atomic and electronic structures that are critical for still under discussion. We find an essential role of interface between monolayer SiC substrate superconductivity. In process, at a carbon layer terminating changes to by Ca-termination (monolayer becomes bilayer), inducing more electrons than free-standing model. Then, Ca is intercalated layers, which shows with updated temperature (TC) up 5.7 K. addition,...