Details

Autor(en) / Beteiligte

• Wei, Ping-Jie
• Yu, Guo-Qiang
• Naruta, Yoshinori
• Liu, Jin-Gang

Titel

Covalent Grafting of Carbon Nanotubes with a Biomimetic Heme Model Compound To Enhance Oxygen Reduction Reactions

Ist Teil von

• Angewandte Chemie (International ed.), 2014-06, Vol.53 (26), p.6659-6663

Auflage

International ed. in English

Ort / Verlag

Weinheim: WILEY-VCH Verlag

Erscheinungsjahr

2014

Quelle

MEDLINE

Beschreibungen/Notizen

• 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. Bio‐inspired catalyst defeats Pt: A biomimetic electrocatalyst for the oxygen reduction reaction (ORR) has been covalently grafted onto multiwalled carbon nanotubes. Without pyrolysis, this bio‐inspired catalyst, in which an axial imidazole‐coordinated porphyrin mimics the active site of O2‐activating heme‐containing enzymes, shows superior ORR activity and stability compared to the state‐of‐the‐art Pt/C catalyst in both acidic and alkaline solutions.