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  • Title: Covalent grafting of carbon nanotubes with a biomimetic heme model compound to enhance oxygen reduction reactions.
    Author: Wei PJ, Yu GQ, Naruta Y, Liu JG.
    Journal: Angew Chem Int Ed Engl; 2014 Jun 23; 53(26):6659-63. PubMed ID: 24842193.
    Abstract:
    The oxygen reduction reaction (ORR) is one of the most important reactions in both life processes and energy conversion systems. The replacement of noble-metal Pt-based ORR electrocatalysts by nonprecious-metal catalysts is crucial for the large-scale commercialization of automotive fuel cells. Inspired by the mechanisms of dioxygen activation by metalloenzymes, herein we report a structurally well-defined, bio-inspired ORR catalyst that consists of a biomimetic model compound-an axial imidazole-coordinated porphyrin-covalently attached to multiwalled carbon nanotubes. Without pyrolysis, this bio-inspired electrocatalyst demonstrates superior ORR activity and stability compared to those of the state-of-the-art Pt/C catalyst in both acidic and alkaline solutions, thus making it a promising alternative as an ORR electrocatalyst for application in fuel-cell technology.
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