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首页> 外文期刊>RSC Advances >Enhanced electrocatalytic activity of nitrogen-doped multi-walled carbon nanotubes towards the oxygen reduction reaction in alkaline media
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Enhanced electrocatalytic activity of nitrogen-doped multi-walled carbon nanotubes towards the oxygen reduction reaction in alkaline media

机译：氮掺杂多壁碳纳米管对碱性介质中氧还原反应的增强电催化活性

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In this work multi-walled carbon-nanotubes (MWCNTs) were doped with nitrogen using cyanamide (CM) or dicyandiamide (DCDA). To incorporate nitrogen into the CNT structure, high-temperature pyrolysis in an inert atmosphere was performed. For surface characterisation of nitrogen-doped CNTs (NCNTs) X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used. According to the results of XPS analysis, nitrogen was successfully incorporated into the carbon nanotube network. The electrocatalytic activity of NCNT catalysts for oxygen reduction reaction (ORR) in alkaline media was examined using the rotating disk electrode (RDE) and linear sweep voltammetry (LSV) measurements. The NCNT-DCDA material showed a better ORR performance than the NCNT-CM catalyst. The RDE results reveal that the NCNT materials studied could be considered as interesting alternatives to Pt-based catalysts in alkaline membrane fuel cells.
机译：在这项工作中，使用氰胺（CM）或双氰胺（DCDA）向氮气中掺杂多壁碳纳米管（MWCNT）。为了将氮结合到CNT结构中，在惰性气氛中进行高温热解。为了对氮掺杂的CNT（NCNT）进行表面表征，使用了X射线光电子能谱（XPS），拉曼光谱，扫描电子显微镜（SEM）和透射电子显微镜（TEM）。根据XPS分析的结果，成功地将氮掺入了碳纳米管网络中。使用旋转盘电极（RDE）和线性扫描伏安法（LSV）测量来检查NCNT催化剂在碱性介质中对氧还原反应（ORR）的电催化活性。 NCNT-DCDA材料显示出比NCNT-CM催化剂更好的ORR性能。 RDE结果表明，所研究的NCNT材料可被视为碱性膜燃料电池中基于Pt的催化剂的有趣替代品。

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