A5033827907- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Fuel Cells and Related Materials
- Nanomaterials for catalytic reactions
- Supercapacitor Materials and Fabrication
- Nanocluster Synthesis and Applications
- Conducting polymers and applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Advanced Sensor and Energy Harvesting Materials
- CO2 Reduction Techniques and Catalysts
- Advanced Battery Materials and Technologies
- User Authentication and Security Systems
- Ionic liquids properties and applications
- Electrochemical Analysis and Applications
- Advancements in Battery Materials
- Advanced Photocatalysis Techniques
- Quantum Dots Synthesis And Properties
- Advanced Authentication Protocols Security
- Molecular Junctions and Nanostructures
- Electrochemical sensors and biosensors
- Porphyrin and Phthalocyanine Chemistry
- Advanced Nanomaterials in Catalysis
- Security in Wireless Sensor Networks
Tohoku University
2021-2025
Advanced Institute of Materials Science
2024-2025
Kyoto University Institute for Chemical Research
2020-2021
Kyoto University
2020-2021
Molecular Fe azaphthalocyanine catalysts with diverse long-chain “dancing patterns” demonstrate variable oxygen reduction reaction performance for fuel cells, aligning well our pH-field coupled microkinetic model.
Zn–air batteries have only been used in limited applications, such as hearing aid batteries, due to their low power density and standard voltage of around 1.4 V. Therefore, use a drive source cutting-edge devices drones, it is essential improve the output density. Here, we propose with high potential (∼2.25 V) (∼318 mW/cm2) by using newly designed iron azaphthalocyanine unimolecular layer (AZUL) electrocatalyst tandem battery cell. The AZUL this new type cell had electrochemical stability...
Abstract Phthalocyanines (Pcs) have garnered significant attention as promising catalysts for electrochemical CO 2 reduction (ECR); however, traditional methods preparing carbon‐supported Pcs are often complex and time‐consuming, limiting their industrial applicability. Herein, a rapid spray‐growth method is introduced that directly deposits CoPc crystals onto carbon paper (CP) in just 15 min. The resulting CoPc/CP electrode maintains > 90% selectivity across broad ECR window (−0.57 to...
In this report, we demonstrate that high-capacity hybrid supercapacitors can be realized by utilizing iron azaphthalocyanine (FeAzPc-4N) adsorbed activated carbons (ACs) as an electrode due to the combination of electric double layer carbon surfaces and redox reactions FeAzPc-4N molecules. By increasing mixing ratio with ACs, a maximum capacity 907 F/gAC is achieved, also enabling rapid charging discharging at 20 A/g. The revelation capacitor electrode's durability through 000 cycles...
Herein, we report the synthesis of gold nanoclusters (AuNCs) functionalized by peptide dendron thiolate ligands forming a hydrogen bonding supramolecular reaction field. The prepared AuNCs act as efficient photocatalysts that promote oxidative cyclization an amino alcohol to afford oxazolidine product. Circular dichroism (CD) spectroscopy and 1H NMR titration experiments revealed dynamic transformation interdendron bonds into intermolecular between ligand substrate is key accelerating...
To obtain safe, high-performance Li-ion batteries, the development of electrolytes with high impact resistance and ionic conductivity is important. Ionic at room temperature has been improved by using poly(ethylene glycol) (PEG) diacrylate (PEGDA) to form three-dimensional (3D) networks solvated liquids. However, effects molecular weight PEGDA on conductivities relationship between network structures cross-linked polymer have not discussed in detail. In this study, dependence...
The oxygen reduction reaction (ORR) and evolution (OER) are important processes for various energy devices, including polymer electrolyte fuel cells, rechargeable metal-air batteries, water electrolyzers. We herein report the preparation of a rare metal-free highly efficient ORR/OER electrocatalyst by calcination mixture blood meal ascidian-derived cellulose nanofibers. obtained carbon alloys showed high performances proved to be promising electrocatalysts. synthesized entirely from biomass...
This paper reports the realization of a water-activated magnesium–air battery by using only low environmental impact materials and without use heavy metals.
Abstract In this report, we elucidated the hydrogen evolution reaction (HER) catalytic activity of different metal-azaphthalocyanine unimolecular layer (AZUL) catalysts and compared overpotentials in alkaline electrolyte membrane water electrolysis (AEMWE). While are bit higher to Pt/C, system utilizing FeAzPc-4N with Sustainion ® showed a low overpotential 2.02 V at 1.0 A/cm 2 faraday efficiency 96.3% even among previous alternative catalysts. It is noteworthy that AZUL not using precious...
As part of ongoing efforts to realize a low‐carbon and hydrogen‐based society, there is an increasing demand for high‐performance electrocatalysts, which are key materials fuel cells water electrolysis systems. Although platinum group metals exhibit high catalytic activity, production costs due resource constraints, limited countries production, geopolitical supply issues threatening their use. Therefore, it crucial make substantial changes in utilization the sustainable electrochemical...
The self-assembled monolayer (SAM)-modified metallic nanoparticles (MNPs) often exhibit improved chemoselectivity in various catalytic reactions by controlling the reactants’ orientations adsorbed SAM; however, there have been a few examples showing that reaction rate, i.e., activity, is enhanced SAM-modification of MNP catalysts. critical parameters affect such as supports, nanoparticle size, and molecular structures SAM components, remain uninvestigated these sporadic literature...
In this study, we optimized the synthesis conditions of biomass-derived carbon alloy catalyst from cellulose nanofibers (CNFs) derived sea pineapple shells and dried blood meals to produce a...
Alkaline water electrolysis and alkaline exchange membrane (AEM) are expected to be next-generation hydrogen generation devices due their low corrosion, high efficiency, maintenance costs. The performance of the electrode catalyst is especially important as it directly affects overvoltage electrolysis, platinum (Pt), a rare metal, has traditionally been used for evolution reaction (HER) its direct impact on generation. However, resource constraints rising costs, development alternative...
Electrocatalysts In article number 2200107, Hiroshi Yabu and co-workers, present carbon catalysts obtained by pyrolysis of biomass resources including cellulose nanofibers, blood meals vitamin B12 showing high oxygen reduction, evolution hydrogen catalytic activity, comparable to that rare metals.