A5075103650- Electrocatalysts for Energy Conversion
- Fuel Cells and Related Materials
- Machine Learning in Materials Science
- Electron and X-Ray Spectroscopy Techniques
- Nanomaterials for catalytic reactions
- Electrochemical Analysis and Applications
- Conducting polymers and applications
- X-ray Spectroscopy and Fluorescence Analysis
- Hydrogen Storage and Materials
- Machine Learning and ELM
- Ammonia Synthesis and Nitrogen Reduction
- Advancements in Solid Oxide Fuel Cells
- Water Quality Monitoring and Analysis
- Catalytic Processes in Materials Science
- Advanced Materials Characterization Techniques
Kyoto University
2022-2025
Ba 0.5 Sr Co x Fe 1-x O 3-δ (BSCF) has garnered considerable attention as a promising catalyst for the alkaline oxygen evolution reaction (OER). However, intrinsic roles of and at active sites during...
Ordered intermetallic PtCo alloys are promising candidates for next-generation low-Pt catalysts in proton exchange membrane fuel cells (PEMFCs) due to their high activity and stability originating from ligand strain effects. However, the influence of ordered phase on surface structure, especially after Pt-rich shell formation, remains poorly understood. In this study, we systematically investigated structural electrochemical properties with varying degrees ordering, prepared by controlling...
Low Pt-based alloy catalysts are regarded as an efficient strategy in achieving high activity for the oxygen reduction reaction (ORR) proton-exchange membrane fuel cells (PEMFCs). However, desired durability low catalysts, such Pt1Co3 catalyst, has still been considered a great challenge PEMFCs. In this study, we investigate sub-2.5 nm PtxCoy with varying Co content and Pt1Co3@Pt core-shell (CS) nanostructure obtained through simple displacement reaction. The Pt1Co3@Pt_H showed mass (MA) of...
Low-platinum alloy nanowire catalysts enhance the performance of polymer electrolyte membrane fuel cells. An issue with ultrafine PtNi catalysts, especially those rich in Ni, is pronounced Ni leaching...
The rapid increase in global energy demands and environmental awareness regarding the excessive use of fossil fuel has spurred significant academic interest development alternative conversion storage technologies that prioritize both efficiency sustainability. Among all kinds renewable energy, hydrogen holds potential to create a carbon free clean society, possible solution issues. 1 Electrochemical water splitting is considered as greener approach for pure H 2 , which involved cathodic...
Proton exchange membrane fuel cells (PEMFCs) have garnered significant attention to fulfill the "carbon neutrality" goal. The ever-growing demand for PEMFCs necessitates development of effective catalysts maximize utilization platinum (Pt), given its rocketing price and inadequate availability. 1 formation Pt alloys with earth-abundant transition metals such as Co, Fe, Cu, Zn is recognized one most promising approach reduce content increase overall activity. 2 Particularly, ordered PtCo...
To mitigate global warming, the integration of renewable energy sources into conversion/generation systems is fundamental. Currently dominant alkaline water electrolysis (AWE) technology suffers from challenges including crossover product gases, high ohmic resistance, limited current density and low operating pressure, mainly because utilization a diaphragm liquid electrolyte in AWE device. Using polymer-based proton exchange membrane (PEM) for efficient transfers, PEM (PEM–WE) can...
The development of proton exchange membrane fuel cells (PEMFCs) have received increasing attention for its potential to get rid dependence on fossil fuels and curb carbon emissions. However, the application PEMFC has been limited by consumption platinum due sluggish kinetics cathode reaction limiting resources. It is well-known that oxygen species generated Pt surface hiders ORR at high region. Therefore, it very important evaluate interaction between catalyst based electronic structure....
Developing environmentally friendly and renewable energy sources is essential due to the environmental security issues caused by traditional combustion of fossil fuel-based sources. Therefore, as a clean sustainable carrier, hydrogen has attracted great attention in recent years. In this regard, water electrolysis utilizing produce considered one most promising technologies. It believed elucidation reaction mechanism highly active iridium oxides for further development cost-efficient PEM...
Polymer electrolyte fuel cells (PEFCs) are attracting attention as an environmentally friendly electrochemical device that uses hydrogen a fuel. The application of PEFC has been limited by the consumption platinum due to sluggish kinetics cathode reaction and limiting reserves. It noted interaction between catalyst oxygen intermediate species results in overpotential ORR process. Therefore, it is very important evaluate based on electronic structure. Pt nanowires known be highly active...
Polymer electrolyte fuel cells (PEFCs) are clean energy devices with polymer electrolytes and expected to play an important role in the development of a global renewable system pure hydrogen society future. PEFCs have already been applied for small-scale systems such as cell vehicles (FCVs). Pt-based catalysts basically used due relatively inefficient reaction kinetics catalyst degradation under strong acidic conditions during oxygen reduction (ORR). However, there still many difficulties...
Polymer electrolyte fuel cells (PEFCs) have been developed for electric device applications such as cell vehicles (FCV). PEFC cathode catalyst requires an excess Pt due to the degradation of oxygen reduction reaction (ORR) activity. Many research efforts aim design Pt-based nanomaterials with controllable composition and structure increase their activity while reducing amount Pt, like core-shell structure. The is obtained by Adzic’s method (Cu-UPD) 1 , where underpotential deposition (UPD)...