2-Methylimidazole-tuned "4-Self" strategy based on benzimidazole-5-carboxylate for boosting oxygen reduction electrocatalysis - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Applied Surface Science Année : 2022

2-Methylimidazole-tuned "4-Self" strategy based on benzimidazole-5-carboxylate for boosting oxygen reduction electrocatalysis

Résumé

Rational design highly active transition metal or transition metal oxides/nanocarbon hybrids is one of the feasible way to deliver a cooperative oxygen reduction (ORR) with a synergistic effect of the hybrid interface. Herein, based on benzimidazole-5-carboxylate (BIMC), CoO/Co-N-C nanocomposites are fabricated via 2-methylimidazole (2-MeIm)-tuned “4-Self” strategy, namely, self-templating, self-adapting, self-assembly and self-catalysis. As a base competitive ligand with N and C sources, 2-MeIm modulates the dispersion of BIMC in methanol to generate collodial-like BIMC tiny particles, the coordination ability of BIMC to Co(II), the composition and morphology of the self-assembled precursor (Co-BM), and as well as the conductivity of the resultant electrocatalyst. Impressing, carbonization of Co-BM at 800 °C under N2 atmosphere endows the pyrolysis product (Co-BM-800) with the well-dispersed Co/CoO riveted on nitrogen-doped carbon, as well as the enhanced ORR performance in terms of positive onset-potential (0.890 V vs. RHE), large diffusion limiting current density (5.21 mA cm−2), and high stability.
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Dates et versions

hal-03806821 , version 1 (08-10-2022)

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Yu-Xuan Dai, Wen-Li Xin, Lian-Hua Xu, Ji Li, Yi‐Xuan Li, et al.. 2-Methylimidazole-tuned "4-Self" strategy based on benzimidazole-5-carboxylate for boosting oxygen reduction electrocatalysis. Applied Surface Science, 2022, 591, pp.153066. ⟨10.1016/j.apsusc.2022.153066⟩. ⟨hal-03806821⟩
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