Abstract
Ionic liquids (ILs) are highly suitable to act as precursors for nitrogen-doped carbon materials. Therefore two structural requirements must be fulfilled: On the one hand, the cation should carry nitrogen in a preferably aromatic environment, on the other hand nitrile groups are essential that can be e.g. incorporated by dicyanamide anions. Thermolysis of such ILs yields highly conductive nitrogen doped carbon exhibiting a graphitic microstructure. Furthermore, various nanomorphologies can be induced via hard-templating. The material has been shown to sufficiently suppress growth and agglomeration of Pt nanoparticles upon their electrocatalytic performance, when applied as a thin coating on the Pt host material. This novel concept of reactivity could further be applied in other fields of materials synthesis, paving the way for the one-pot synthesis of mesoporous carbon/silica composites and in-situ metal doping thereof.
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Acknowledgments
DFG is kindly acknowledged for funding of this work within the framework of UNICAT cluster of excellence. Dr Caren Göbel and Sören Selve are gratefully acknowledged for obtaining TEM micrographs at ZELMI. Dr Yuanjian Zhang is kindly thanked for his outstanding contribution of XPS measurements. Special thanks go to Maria Unterweger, Christina Eichenauer and Anne Sobotta for their support of our work.
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Paraknowitsch, J.P., Tuaev, X., Strasser, P. et al. Dicyanamide Ionic Liquids: A Versatile Precursor System for Advanced Mesoporous Materials and Functional Composites. MRS Online Proceedings Library 1473, 13–19 (2012). https://doi.org/10.1557/opl.2012.1516
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DOI: https://doi.org/10.1557/opl.2012.1516