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Title: Highly dispersed and ultrafine Co3O4@N-doped carbon catalyst derived from metal-organic framework for efficient oxygen reduction reaction
Authors: Chu, Yuanyuan
Deng, Bohan
Wang, Kuixiao
Xue, Yu
Tan, Xiaoyao
Keywords: Co3O4/KB@MOF-derived;Durability;Methanol-tolerance;Oxygen reduction reaction;Direct methanol fuel cell
Issue Date: Jul-2021
Publisher: NIScPR-CSIR, India
Abstract: Electrocatalysts are composed of transition metal/metal oxide and N-doped carbon can overcome the sluggish kinetics of oxygen reduction reactio. Herein, the Co3O4/ketjen black (KB)@MOF-derived with uniformly dispersed and ultrafine Co3O4 nanoparticles (1-5 nm) are synthesized by a facile in-situ method and subsequent mild pyrolysis process. It exhibits enhanced activity with onset potential of 0.96 V (vs. RHE) and a half-wave potential of 0.86 V (vs. RHE) in 0.1 M KOH solution, the excellent durability with E1/2 a small negative shift of 10 mV after 5000 continuous cycles and good methanol-tolerance property. The ultrahigh catalytic performance of Co3O4/KB@MOF-derived can be ascribed to the small particle size range of 1-5 nm of Co3O4, as well as the strong interaction between the in-situ formed N-Co3O4 active sites and substrate under the mild calcination temperature. Above all, these indicate that the as-prepared Co3O4/KB@MOF-derived may be a good alternative to commercial Pt-based catalysts.
Page(s): 932-937
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.60A(07) [July 2021]

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