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Carbon-nitrogen/graphene composite as metal-free electrocatalyst for the oxygen reduction reaction

ISSN号：1001-6538
期刊名称：Chinese Science Bulletin
时间：0
页码：3583-3589
分类：TQ165[化学工程—高温制品工业] TM911.4[电气工程—电力电子与电力传动]
作者机构：[1]Jiangsu Key Laboratory for Organic Electronics ＆ Information Displays and Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210046, China, [2]Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Jiangsu Provincial Laboratory for Nanotechnology, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
相关基金：This work was supported by the National Basic Research Program of China （2009CB930600）, the National Natural Science Foundation of China （20833002, 20903057, 20905038, 20974046）, the Research Fund for the Doctoral Program of Higher Education of China （20093223120002）, the Natural Science Foundation of Jiangsu Province （BK2010525）, the Foundation of Jiang su Educational Committee （ 09 KJB150007, 08 KJB150011） and the Scientific Research Foundation of Nanjing University of Posts and Telecommunications （NY208046）.
相关项目：碳氮管/导电高分子功能材料的组装与蛋白质传感器的构建

关键词：氧还原反应, 复合金属, 电催化剂, 石墨复合材料, 一氧化碳中毒, 石墨氧化物, 总氮含量, 干燥过程, graphene, graphene oxide, carbon nitride, metal-free electrocatalyst, oxygen reduction reaction

中文摘要：

像表的碳氮(CN x ) 有氮(x 0.15 ) 的一个高内容的 /graphene composites 被 polypyrrole (PPy ) 的碳化准备 /reduced-graphene-oxide (rGO ) 在 600800cture (NEXAFS ) 合成光谱学。重要反响的结构的重要尖依赖(* 并且 *) 表明 PTCDA 分子在底层表面上采用订的几何学。一般水准倾斜 PTCDA 分子的飞机的角度 27 是 ?????? ′？？

英文摘要：

Sheet-like carbon-nitrogen （CNx）/graphene composites with a high content of nitrogen （x 〈 0.15） was prepared by the carboniza- tion of polypyrrole （PPy）/reduced-graphene-oxide （rGO） composite at 600-800℃. We used rGO instead of graphene oxide （GO） sheets as a template and a substrate to immobilize PPy since the PPy/GO composite agglomerates easily because of the dehydration of excess oxygen-containing groups on the GO sheets during the drying process. The dried PPy/rGO intermediate and its derived CNJgraphene products retain their high dispersion and loose-powder features. The as-prepared CNJgraphene composites have a total nitrogen content of about 10 at% and their nitrogen state is mainly of pyridinic and graphitic type. CNJgraphene composites exhibit excellent performance for the oxygen reduction reaction （ORR） in terms of electrocatalytic activity, stability and immunity towards methanol crossover and CO poisoning, suggesting their potential as metal-free electrocatalysts for the ORR.

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