Electrocatalytic oxygen reduction over Co@Co3O4/N-doped porous carbon derived from pyrolysis of ZIF-8/67 on cellulose nanofibers

초록

Co@Co3O4 nanoparticles highly dispersed on N-doped porous carbon (Co,N-C/TOCNF) were prepared by pyrolysis of the Zn/Co bimetallic ZIF-8/67 in situ grown on the carboxylated cellulose nanofibers (TOCNF) at 900 degrees C. The physicochemical properties of the material were examined using various instruments, and it was applied as an electrocatalyst for oxygen reduction reaction. The interconnected three-dimensional network in TOCNF prevented aggregation of the catalytically active Co nanoparticles and enhanced electron transfer and mass diffusion, and Co,N-C/TOCNF showed excellent catalytic performance in alkaline medium with improved stability compared to the one by the commercial Pt/C catalyst.

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