一种高效燃料电池催化剂制备及性能研究

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中图分类号：TM911.4;TQ426 文献标志码：A 文章编号：1001-5922（2025）12-0075-04

Preparation and performance study of an efficient fuel cell catalyst

ZHANG Qiong （Jinzhong Vocational and Technical College，Jinzhong O3O6O1，Shanxi China）

Abstract：Inorder todevelop high-eficiencyand low-costfuelcell catalysts，this studyusedcobalt-based zeolite imidazolate framework ZIF-67as a carrer and silicaasan intermediate layer toconstruct acore-shell double Pt-loaded Pt @ ZIF-67/Pt composite catalyst.At the same time，different Pt @ ZIF-67/Pt composite catalysts were prepared by adjusting the formation time of SiO 2 layer to 6，12 and 18 h，and the performance test was carried out. The results show that the 12-Pt @ ZIF-67/Ptcatalyst witha SiO -2 layerformation time of12h exhibits thebest crystalinityandelement distribution，and itselectrochemical activeareareaches52.7m2/g.Themassactivityof methanol oxidationreactionis1 508.3 mA/mg，whichis 3.6 times that of Pt/C catalyst. The initial potential of the oxygenreductionreaction is1.O6 V，the half-wave potential is O.81V，the electron transfer number is close to 4， and the H22 yield is only 4.01% . In addition，the catalyst exhibits excellent practical application performance in zinc-airbatteries，with a maximum power density of 125.6mW/cm2 and stable performance in 6Oo h charge-discharge cycles.This studyprovides anew ideaforthe developmentoffuelcell catalysts and expands theapplication prospects of metal-organic framework materials in the energy field.

Key words：fuel cellcatalyst;cobalt-based zeolite imidazole ester framework;methanol oxidation reaction;oxygen reduction reaction;zinc-air battery

燃料电池具有能量转换效率高、环境污染小等优势，具有广阔的应用前景1。（剩余5359字）