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

被引：232
作者：
Wei, Ping-Jie [1 ,2 ]
Yu, Guo-Qiang [1 ,2 ]
Naruta, Yoshinori [3 ]
Liu, Jin-Gang [1 ,2 ]
机构：
[1] E China Univ Sci & Technol, Key Lab Adv Mat MOE, Shanghai 200237, Peoples R China
[2] E China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China
[3] Chubu Univ, Inst Sci & Technol, Kasugai, Aichi 4878501, Japan
来源：
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2014年 / 53卷 / 26期
关键词：
bioinorganic chemistry; electrochemistry; enzymes models; oxygen; reduction; CYTOCHROME-C-OXIDASE; FUEL-CELLS; PEROXO INTERMEDIATE; METAL-CATALYSTS; ACTIVE-SITE; IRON; ELECTROCATALYSTS; PHTHALOCYANINE; ACTIVATION; CHALLENGES;
D O I：
10.1002/anie.201403133
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
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.
引用
收藏
页码：6659 / 6663
页数：5
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