Enhance the durability of the oxygen reduction reaction catalyst through the synergy of improved graphitization and nitrogen doping of carbon carrier
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY(2024)
摘要
The energy crisis has highlighted the need for low-cost, highly active, and durable catalysts for Proton Exchange Membrane Fuel Cells (PEMFCs). Accordingly, we have developed a highly durable composite carbon carrier material, ECP600@NC, through pyrolyzing polyaniline coated on commercial carbon black ECP600, and supported the Pt nanoparticles (NPs) on ECP600@NC to prepare catalyst Pt/ECP600@NC. Compared with the catalyst Pt/ECP600, the electrochemical active surface area (ECSA) of Pt/ECP600@NC (94.1 m(2)center dot g(Pt)(-1)) increased by 15% and the mass activity (MA) of Pt/ECP600@NC (343.9 mA center dot mg(Pt)(-1)) increased by 142%. After 30,000 cycles carbon and Pt attenuation tests, the ECSA retention rate of Pt/ECP600@NC increased by 40% compared with Pt/ ECP600@NC, and the MA retention rate of Pt/ECP600@NC increased by 15%. It is the synergistic effect of higher graphitization degree and nitrogen doping of the carbon carrier that improves the performance and durability of Pt/ECP600@NC. This work provides a promising method to optimize the catalysts for PEMFCs.
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关键词
Synergistic effect,Nitrogen-doped carbon,Higher graphitization degree,Durability of catalysts
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