Phosphorus-Doped Catalyst for Methanol Fuel Cells
Official patent title
Method for electrochemical oxidation of methanol
Arabic title: طريقة للأكسدة الكهروكيميائية للميثانول
Invention
Invention
Problem
Direct methanol fuel-cell reactions can suffer slow kinetics, while benchmark platinum-group catalysts are costly and alternative catalysts require improved activity and tolerance.
Why it matters
A characterized methanol-oxidation catalyst could support research on more effective fuel-cell anodes and electrochemical conversion of a liquid fuel.
Approach
The method coats a working electrode with phosphorus-doped silver tungstate nanoparticles and applies voltage to an acidified methanol solution. The disclosure defines phosphorus loading, silver-tungstate phase ratio, current density, mass activity, active surface area, conductivity, and electrode-coating components.
Who may benefit
Potential beneficiaries include direct-methanol fuel-cell researchers, electrocatalyst manufacturers, electrochemistry laboratories, advanced-electrode developers, and clean-energy conversion teams.
Potential value
The technology combines phosphorus-doped Ag2WO4 composition control, defined electrode architecture, and laboratory current-density, mass-activity, surface-area, and conductivity metrics for methanol oxidation.
Background
Background
Direct methanol fuel cells convert a liquid fuel through methanol oxidation at the anode and oxygen reduction at the cathode. Slow reaction kinetics reduce overall performance and motivate alternative catalysts. Silver-based catalysts can show useful alkaline oxygen-reduction behavior, while silver tungstate has been investigated in adsorption, sensing, and electrochemical contexts. The publication focuses instead on phosphorus-doped silver tungstate as an electrode catalyst for methanol oxidation, with laboratory measurements intended to characterize its activity and electrical behavior.
Technology overview
Technology overview
Phosphorus-doped Ag2WO4 nanoparticles with defined α/β crystallite ratios are applied to a working electrode, optionally with PVDF and carbon black. Voltage is applied in an acidified methanol solution against an Ag/AgCl reference electrode. The publication reports current density at 0.58 V, mass activity, electrochemical active surface area, and conductivity. XRD, TEM, HRTEM, and XPS characterize phases, morphology, and chemical bonding.
Potential applications
Potential applications
- Methanol-oxidation catalyst research for direct methanol fuel cells.
- Experimental anode coatings for electrochemical fuel conversion.
- Phosphorus-doped silver-tungstate nanomaterial characterization.
- Laboratory studies of current density, mass activity, and active surface area.
Evidence-supported advantages
Evidence-supported advantages
- Phosphorus loading and α/β silver-tungstate phase ratios are specified.
- The publication reports current-density and mass-activity thresholds.
- Electrochemical active surface area and electrical conductivity are characterized.
- PVDF and carbon black can be incorporated in the working-electrode coating.
- Multiple structural and surface-analysis techniques are described.
Development stage
Development stage
Laboratory nanomaterial characterization and methanol-oxidation measurements are described; complete fuel-cell operation was not established.
Commercial opportunity
Commercial opportunity
The catalyst may interest fuel-cell and advanced-electrode partners. Translation requires full-cell tests, long-duration durability, cycling, methanol crossover tolerance, poisoning resistance, product and gas quantification, Faradaic efficiency, acid compatibility, catalyst loading, silver and tungsten cost, scalable synthesis, recycling, and safety assessment.
Patent classifications
Patent classifications
WIPO IPC
- C25B11/077Electrolytic or electrophoretic processes for producing compounds or non-metals; apparatus therefor
CPC
- C25B11/077Electrolytic or electrophoretic processes for producing compounds or non-metals; apparatus therefor
Inventors
Inventors
- First inventorMohamed Khairy Abdel Fattah Omran
- InventorMohamed Mokhtar Mohamed
- InventorSalah Ahmed Ibrahim Eid
- InventorBabiker Yagoub Elhadi Abdulkhair
Keywords
Keywords
- methanol oxidation
- direct methanol fuel cell
- phosphorus doping
- silver tungstate
- Ag2WO4
- mass activity
- electrode catalyst
- electrochemistry
Patent document and drawings
Patent document and drawings
The patent publication is mapped to this record. Patent drawings remain within that publication; no separately cleared public media package has been supplied.