碳载纳米非贵金属（Fe，Co，Ce，W）吡啶催化剂在碱性介质中的氧电化学还原

his work reports the preparation and characterization of novel non-precious metal catalysts metal catalysts supported on carbon, M (M = Fe, Co, Ce, W )N/C, using a solvent-milling method followed by a heat-treatment at elevated temperature, where pyridine is used as the N-rich ligand for precursor complex formation. The morphology and composition of the catalysts were characterized by Fourier-transform infrared (FT-IR) spectra and thermal analysis (TGA). The catalytic activity on oxygen reduction reaction (ORR) was found to depend strongly on the heat-treatment temperatures and the metal pressures for catalyst synthesis. The resulting MPy/C of 40/60 ratio heat-treated at 800oC shows the best catalytic performance in terms of ORR and follows the order: Co > Fe > Ce > W, where the catalyst composed of Co10wt% -Py30wt%/C shows the highest electroactivity for ORR in alkaline media. Using Rotating disk electrode measurements and Koutechy-Levich analysis, the overall electron transfer number in the catalyzed ORR on Co10wt% -Py30wt%/C was found to be 3.8, suggesting the catalyzed ORR is a 4-electron transfer process from O2 to H2O.