Preparing method for supported core-shell-structure catalyst for low-temperature fuel cell

Abstract

The invention provides a method for preparing a supported core-shell-structure nanometer catalyst. A core is non-platinum or low-platinum metal, a casing is made of platinum, and the catalyst can be used as a low-temperature fuel cell catalyst. The preparation method comprises utilizing supported non-platinum or low-platinum metal nano-particles to serve as a catalyst precursor, utilizing a weak reducing agent to deposit reducing platinum on the surface of the non-platinum or low-platinum metal. The preparation method is simple and effective, the prepared cell structure catalyst has small particle size and even particle size distribution, and the catalyst has good dispersity. In addition, the catalyst can improve utilization rate of platinum, reduces use amount of platinum, and presents high catalytic activity to oxygen reduction reaction.

Description

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AI Technical Summary

Benefits of technology

This patented technology provides an improved way to make small particles with specific sizes distributed evenly over different materials like carriers without causing them to stick together too much during processing. It also allows for more efficient deposition onto these tiny supports while maintaining their original shape. Additionally, it improves the efficiency of oxidative fuel cell electrocatalysis processes due to its enhanced surface area exposed towards the reactant gases compared to conventional techniques such as reduced pressure pyrogenesis.

Problems solved by technology

This patents discuss how reducing costs while maintaining their performance remains important due to the use of expensive metals such as palladium (pac). To address these issues, researchers focus more heavily on developing new materials called “cobalt” based catalyst systems. These catalyst components include transition elements like iron(II), ruthenium(III)) and iridium(I)). Additionally, there is an urgent demand by consumers towards lower prices without compromising safety standards. Therefore, manufacturors want to develop a process where highly active catalyst material can be produced economically efficiently and uniformly within reasonable limits.

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