期刊
CARBON
卷 113, 期 -, 页码 159-169出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2016.11.037
关键词
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资金
- Estonian Ministry of Education and Research [IUT20-16]
- ERA-NET Action INNO INDIGO [609515, FP7-INCO-2013-3]
- EU through the European Regional Development Fund [TK141]
In this work, a novel type of nitrogen-doped carbide-derived carbon (N-CDC) catalysts is synthesized and their activity toward the oxygen reduction reaction (ORR) is investigated. Two different methods of preparation of N-CDC materials are compared: chlorination of titanium carbonitride and pyrolysis in the presence of a nitrogen-containing compound (dicyandiamide) of pre-chlorinated titanium carbide. The obtained catalysts are tested for ORR activity in 0.1 M KOH solution using the rotating disk electrode method along with their stability during 1000 cycles and compared to a commercial Pt/C catalyst. The surface morphology is investigated using scanning electron microscopy and the bulk composition with energy dispersive X-ray spectroscopy. The surface composition of the catalyst materials is analyzed with X-ray photoelectron spectroscopy and the structure with X-ray diffraction and Raman spectroscopy. The porosity of N-CDC materials is described with N-2 physisorption. The dicyandiamide-derived N-doped CDC material showed excellent electrocatalytic activity for ORR in alkaline media. This N-CDC catalyst could be considered as a promising cathode material in alkaline fuel cells. (C) 2016 Elsevier Ltd. All rights reserved.
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