催化作用
X射线光电子能谱
碳化钛
碳纤维
材料科学
物理吸附
钛
热解
碳化物
拉曼光谱
扫描电子显微镜
旋转圆盘电极
无机化学
氮气
化学工程
化学
循环伏安法
电极
电化学
有机化学
冶金
复合材料
物理化学
工程类
物理
光学
复合数
作者
Sander Ratso,Ivar Kruusenberg,Maike Käärik,Mati Kook,Rando Saar,Martti Pärs,Jaan Leis,Kaido Tammeveski
出处
期刊:Carbon
[Elsevier]
日期:2017-03-01
卷期号:113: 159-169
被引量:89
标识
DOI:10.1016/j.carbon.2016.11.037
摘要
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 N2 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.
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