A5042724376- Advanced Photocatalysis Techniques
- Copper-based nanomaterials and applications
- Electrocatalysts for Energy Conversion
- Electronic and Structural Properties of Oxides
- Perovskite Materials and Applications
- MXene and MAX Phase Materials
- Quantum Dots Synthesis And Properties
- Gas Sensing Nanomaterials and Sensors
- Chalcogenide Semiconductor Thin Films
- Combustion and Detonation Processes
- Electrochemical Analysis and Applications
- TiO2 Photocatalysis and Solar Cells
- Soil and Unsaturated Flow
- Ammonia Synthesis and Nitrogen Reduction
- Spectroscopy and Quantum Chemical Studies
- Adsorption and Cooling Systems
- Solar-Powered Water Purification Methods
- Risk and Safety Analysis
- Landfill Environmental Impact Studies
- Mine drainage and remediation techniques
- Adsorption and biosorption for pollutant removal
- Clay minerals and soil interactions
- ZnO doping and properties
- Surface Chemistry and Catalysis
- Heat Transfer and Optimization
University of Miyazaki
2022-2024
The University of Tokyo
2015-2022
Central Research Institute of Electric Power Industry
2022
Bunkyo University
2015-2021
Academic Rights Press (United Kingdom)
2016
Japan Chemical Industry Association
2015-2016
Kyushu University
2006-2014
Nagasaki University
2011-2013
Akita University
2003
The development of robust and efficient water splitting photocatalysts overcomes a long-standing barrier to sustainable large-scale solar hydrogen evolution systems.
Well-aligned polycrystalline Ta<sub>3</sub>N<sub>5</sub>-NRs provide enhanced light harvesting and efficient generation extraction of charge carriers, leading to completely saturated photocurrent.
Metal selenides with narrow bandgaps (480–750 nm) are shown to be applicable stable photocatalytic <italic>Z</italic>-scheme pure water splitting.
A semitransparent Ta 3 N 5 photoanode is designed for efficient and durable solar water splitting. The -CuInSe 2 tandem device exhibits an initial stabilized solar-to-hydrogen efficiency of ∼9% (highest metal oxides/nitrides) 4%, respectively.
High-performance solar-water-splitting technologies are of paramount interest for the cost-effective generation hydrogen fuel; however, their realization is majorly limited by poor solar light absorption and charge separation inside photoanode semiconductors. Herein, we develop photoanodes made from polycrystalline tantalum nitride nanorods (Ta3N5 NRs) to overcome above-mentioned challenges. The morphology crystalline properties Ta3N5 NRs optimized tuning essential parameters glancing angle...
Abstract Designing photoanode semiconducting materials with visible‐light absorption and minimal charge‐carrier recombination for achieving efficient solar‐to‐hydrogen (STH) conversion is challenging. Here, hybrid Ta 3 N 5 nanorods thin films are developed on transparent GaN/Al 2 O substrates. A a loaded cocatalyst achieves the best current density, i.e. 10.8 mA cm −2 , at 1.23 V versus reversible hydrogen electrode under simulated AM 1.5G solar illumination. In tandem configuration...
Photoelectrochemical water splitting is regarded as a promising approach to the production of hydrogen, and development efficient photoelectrodes one aspect realizing practical systems. In this work, transparent Ta3 N5 photoanodes were fabricated on n-type GaN/sapphire substrates promote O2 evolution in tandem with photocathode, realize overall splitting. Following incorporation an underlying GaN layer, photocurrent 6.3 mA cm-2 was achieved at 1.23 V vs. reversible hydrogen electrode. The...
Photoelectrodes of Al-doped La<sub>5</sub>Ti<sub>2</sub>Cu<sub>1−x</sub>Ag<sub>x</sub>S<sub>5</sub>O<sub>7</sub>powder generate a photocathodic current attributable to the hydrogen evolution reaction at +0.7 V<italic>vs.</italic>RHE.
Integrated photoelectrodes with striped structure facilitated the in-plane diffusion of reactants and achieved water splitting efficiency 1.0% without stirring electrolyte.
Detailed numerical simulations are performed to probe performance loss mechanisms and limiting parameters of Ta<sub>3</sub>N<sub>5</sub>-NRs based photoanodes. Device modelling enables the development design strategies realize efficient solar water oxidation.
Barium tantalum oxynitride (BaTaO 2 N), a photocatalyst active during one-step-excitation overall water splitting under visible light, was synthesized by NH 3 -based nitridation of mixture BaCO and amorphous Ta O 5 ·3H O.
Designing stoichiometric, isostructural precursor oxides opens opportunities for the development of (oxy)nitride photocatalysts.
The development of an efficient conversion system to transform solar energy into chemical energy, such as renewable hydrogen, is a promising way overcome problems. Photoelectrochemical (PEC) water splitting means obtaining hydrogen directly from utilizing sunlight. Recent reports have demonstrated that PEC cell with tandem configuration (tandem cell) has the potential realize high solar‐to‐hydrogen (STH) efficiency by splitting. However, there are still many obstacles practical and...
A transparent Ta3N5 photoanode is a promising candidate for the front-side photoelectrode in photoelectrochemical (PEC) cell with tandem configuration (tandem cell), which can potentially provide high solar-to-hydrogen (STH) energy conversion efficiency. This study focuses particular on semiconductor properties and interfacial design of photoanodes fabricated insulating quartz substrates (Ta3N5/SiO2), typically geometric area 1 × cm2 contact indium its edge. material utilizes...
Uniform nanolayer coatings on photoelectrodes for water splitting are effective in improving their durability by isolating the semiconductor from direct contact with liquid electrolytes. Achieving a thin and uniform coating across entire surface of nanostructured uneven using wet processes remains challenge. This study provides strategy spontaneous formation NiFeOx electrocatalyst Ta3N5 nanorods (NRs) mediated acetonitrile (CH3CN) solvent bulky metal ethylhexanoate complexes. Following...
Abstract High-entropy compounds have demonstrated remarkable electrocatalytic activity for oxygen evolution reaction (OER) in water. In this study, amorphous FeNi, CrFeNi, and CrFeCoNi oxy-carbide films were prepared using a single-step electrodeposition technique an aqueous medium. Among them, displayed outstanding OER performance, achieving overpotential of 315 mV at current density ( J ) 10 mA cm −2 . At 50 , selective dissolution Cr-species within was observed, which enhanced both...
Abstract A photoelectrochemical (PEC) cell composed of an Al‐doped La 5 Ti 2 Cu 0.9 Ag 0.1 S O 7 (Al‐LTCA) photocathode and a BaTaO N (BTON) photoanode was employed for overall water splitting. The surface the Al‐LTCA modified first with CdS by chemical bath treatment (CBT) subsequently TiO Pt (to form Pt/TiO /CBT‐CdS/Al‐LTCA). /CBT‐CdS/Al‐LTCA showed significantly enhanced photocurrent PEC hydrogen evolution reaction in strongly alkaline aqueous phosphate solutions. This enhancement...
(CuGa<sub>1−y</sub>In<italic>y</italic>)<sub>1−x</sub>Zn<sub>2x</sub>S<sub>2</sub> has arisen as a highly efficient powder-based photocathode for water splitting under simulated sunlight irradiation.
Photocatalyst sheets active in visible-light-driven water splitting, potentially under irradiation of up to 600 nm, are developed.
The development of visible-light-responsive semiconductor-based photoelectrodes is a prerequisite for the construction efficient photoelectrochemical (PEC) cells solar water splitting. Surface modification with an electrocatalyst on photoelectrode effective maximizing splitting efficiency PEC cell. Herein, we investigate effects surface Ta3N5 photoanodes electrocatalysts consisting Ni, Fe, and Co oxides, their mixture, oxygen evolution reaction (OER) performance. Among investigated samples,...
The hydrogen evolution reaction (HER) of Rh nanoparticles (RhNP) coated with an ultrathin layer Cr-oxides (CrOx ) was investigated as a model electrode for the Cr2 O3 /Rh-metal core-shell-type cocatalyst system photocatalytic water splitting. CrOx electrodeposited over RhNP on transparent conductive fluorine-doped tin oxide (FTO) substrate. facilitates electron transfer process at /RhNP interface, leading to increased current density HER. Impedance spectroscopic analysis revealed that...