Method for Preparing Electrode Catalyst for Fuel Cell and Solid Polymer Fuel Cell

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

This invention provides a new method for preparing highly durable, noble-metal-based (primarily platinum) electrode catalysts for fuel cells, especially solid polymer fuel cells. The key innovation involves preparing the catalyst in the presence of compounds like porphyrins or benzonitrile, which form stable complexes with the precious metal to inhibit the growth (sintering) of catalyst particles during use. This leads to better catalyst performance and longer lifespan.

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

• Solid polymer (proton exchange membrane) fuel cells for vehicles, stationary power generation, or portable electronics
• Other electrochemical devices requiring oxygen reduction catalysts, such as metal-air batteries
• Hydrogen fuel cell applications in the automotive, industrial, or residential sectors
• Development of durable catalyst layers in next-generation green energy systems

BenefitsContent extracted from patent full text and abstract with AI.

• Superior oxygen reduction activity leading to higher fuel cell efficiency
• Increased durability of the catalyst by preventing sintering and growth of catalyst particle size
• Reduced catalyst degradation, resulting in longer operational life and lower replacement costs
• Potentially lower precious metal loading required for the same or better performance, reducing material costs
• Improved overall power generation characteristics and reliability of fuel cells

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

According to the present invention, a method for preparing a noble-metal-based electrode catalyst having excellent oxygen reduction activity and inhibiting sintering caused by enlargement of catalytic metal particle size during operation, thereby having excellent durability, is provided. Also, a method for preparing an electrode catalyst for a fuel cell, comprising the steps of: mixing and reacting a conductive carrier and a compound having a precious metal component with each other in a dispersion medium in the presence of a porphyrin or a derivative thereof or a compound that forms suitable stable complexes with the precious metal component.