Method of Preparing an Electrode Catalyst for Fuel Cells, and a Polymer Electrolyte Fuel Cell

Simple SummaryContent extracted from patent full text and abstract with AI.

The invention provides a method for preparing an improved electrode catalyst for fuel cells. The core idea is to enhance catalysts made from carbon-based materials containing a transition metal (such as Fe, Co, Ni, etc.) coordinated with 2 to 4 nitrogen atoms (MNx sites). This enhancement is achieved by a nitrogen-compensating treatment that repairs or increases the number of these active sites after the catalyst is formed, typically using heat treatment in NH3 or N2 gas. The resulting catalysts offer better performance, especially higher current densities in fuel cells.

Use CasesContent extracted from patent full text and abstract with AI.

• Polymer electrolyte fuel cells for automobiles and buses
• Stationary fuel cell power generation systems for residential, commercial, or industrial use
• Portable fuel cell systems for backup power or remote applications
• Low-cost, high-efficiency hydrogen fuel cell stacks as alternative energy sources
• Specialized fuel cells for drones, robots, or small electronic devices

BenefitsContent extracted from patent full text and abstract with AI.

• Higher catalyst activity, especially at high voltages, resulting in more electricity generated per unit catalyst
• Reduced use of expensive platinum-group metals or the ability to use less-costly metals, lowering overall cost
• Enhanced stability and durability of the catalyst by repairing the active sites lost during production
• Improved fuel cell efficiency and power output, enabling broader adoption in transportation and stationary power sectors
• Potential to make fuel cells more economically viable for mass-market energy solutions

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Patent Abstract

Improved catalyst performance is obtained in a catalyst for fuel cells comprising a carbon-based MNx (2 = x = 4) centre catalyst material in which a transition metal (M) is coordinated to the two ~ four nitrogen atoms, by performing a nitrogen-compensating treatment on the nitrogen-containing metal complex.