A methanol fuel cell anode catalyst and a method for preparing the same

By preloading RuO2 onto a carbon black support to form a PtRu/RuO2/C catalyst, the problems of low stability and slow methanol oxidation kinetics of platinum-ruthenium alloy catalysts were solved, resulting in a direct methanol fuel cell catalyst with high catalytic activity and anti-poisoning performance, and simplifying the synthesis process.

CN116344853BActive Publication Date: 2026-06-19KUNMING INST OF PRECIOUS METALS +1
View PDF 2 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
KUNMING INST OF PRECIOUS METALS
Filing Date
2023-03-30
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

In direct methanol fuel cells, the low stability of platinum-ruthenium alloy catalysts and the slow methanol oxidation kinetics lead to low power density. High concentrations of methanol cause catalyst poisoning, and existing catalyst synthesis methods are complex and difficult to control.

Method used

By preloading RuO2 onto a carbon black support and employing a slow reduction reaction to form a PtRu/RuO2/C composite catalyst, the independence of RuO2 is maintained, the loading of platinum and ruthenium is controlled, and the synthesis process is simplified.

Benefits of technology

A PtRu/RuO2/C catalyst with high catalytic activity, stability, and anti-poisoning properties has been developed. The synthesis process is simple and easy to control, and the catalyst yield is high, making it suitable for direct methanol fuel cells.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN116344853B_ABST
    Figure CN116344853B_ABST
Patent Text Reader

Abstract

This invention discloses an anode catalyst for methanol fuel cells and its preparation method. The catalyst has a platinum loading of 31%–51%, a ruthenium loading of 16%–26%, and a total platinum-ruthenium loading of 47%–77%. The catalyst is prepared by first pre-loading a carbon black support with a ruthenium compound, and then loading a platinum-ruthenium alloy using the ruthenium compound on the carbon black support as an anchoring point. The loading of platinum and ruthenium is controlled by RuO2 pre-loaded on the carbon black support, and the independent nature of RuO2 is maintained while forming the platinum-ruthenium alloy through a slow reduction reaction. The synthesis yield of the catalyst reaches over 95%. The catalyst of this invention exhibits high catalytic activity, stability, and anti-poisoning performance in the catalytic electro-oxidation reaction of methanol, and has broad application prospects in direct methanol fuel cells.
Need to check novelty before this filing date? Find Prior Art