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首页> 外文期刊>Catalysis science & technology >Chemical functionalization of N-doped carbon nanotubes: a powerful approach to cast light on the electrochemical role of specific N-functionalities in the oxygen reduction reaction
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Chemical functionalization of N-doped carbon nanotubes: a powerful approach to cast light on the electrochemical role of specific N-functionalities in the oxygen reduction reaction

机译：n型碳的化学功能化纳米管:给一个强大的方法特定的电化学作用N-functionalities氧气减少反应

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摘要

In this paper, we describe the combination of two different synthetic approaches to carbon nanotube N-decoration/doping: the chemical functionalization with tailored N-pyridinic groups and the classical Chemical Vapor Deposition (CVD) technique. Accordingly, CVD-prepared N-doped CNMs (NMWs) and their N-decorated (chemically functionalized) counterparts (NMW@N-1,N-2) have been prepared and used as metal-free electrocatalysts for the oxygen reduction reaction (ORR). It has been demonstrated that chemical functionalization occurs on the NMW surface sites responsible for their inherent electrochemical properties and "switches them off". As a result, the ORR promoted by NMW@N-1,N-2 is fully controlled by the appended N-heterocycles. A comparative analysis of N-functionalized samples and N-doped (CVD prepared) materials is used to foster the hypothesis of a unique N-configuration (N-pyridinic) responsible for the overall electrochemical performance in NMWs. In addition to that, original electrochemical insights unveiled during the study are discussed and the truly metal-free action of NMW in ORR catalysis is demonstrated.
机译：在本文中,我们描述了两个的组合不同的碳纳米管合成方法N-decoration /兴奋剂:化学功能化与定制N-pyridinic组和经典化学气沉积(CVD)技术。CVD-prepared n型CNMs (NMWs)和他们的N-decorated(化学官能团)同行(NMW@N-1, n - 2)和准备使用的非金属electrocatalysts氧还原反应(ORR)。证明了化学功能化发生在NMW表面网站负责其固有的电化学性能“开关”。提升NMW@N-1, n -完全控制的附加N-heterocycles。分析N-functionalized样品和n型(CVD)准备材料用于培养假设一个独特的N-configuration(N-pyridinic)总体负责在NMWs电化学性能。原来,电化学的见解公布了在研究和讨论真正的不含金属的行动在奥尔NMW催化是证明。

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