Chemical Nature of Catalytic Active Sites for the Electrochemical Redox of Acetaminophen on Nitrogen-Doped Graphene
作者单位：School of Materials Science and Engineering Shandong University of Technology School of Chemical Engineering Nanjing University of Science and Technology
会议名称：《第十三届全国电分析化学学术会议》
会议日期：2017年
学科分类：081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术]
关 键 词：Nitrogen-doped graphene graphitic-N acetaminophen
摘 要：Nitrogen-doped graphene is one of the mostly studied doped graphene, especially since it was reported a valuable metal-free catalyst in ORR associated with alkaline fuel *** with recent intense research efforts, a variety of methods has been used in the preparation of nitrogen-doped graphene(NGE), such as annealing of graphene oxide and NH, pyrolysis of graphene oxide and urea, solvothermal with lithium nitrideand and tetrachloromethane, and so *** these, even excellent performances can be obtained, the real active sites are different to be *** the ORR, it has been generally believed that the doped nitrogen atoms(pyrrole-N, pyridine-N, graphitic-N, and pyridine-N oxide) play a key role [1].For instance, Pyridine-N doping in graphene was believed facilitating oxygen reduction reaction activity [2].Nevertheless, carbon atoms with Lewis basicity next to pyridine-N was also considered to be the real active sites for the ORR, recently [3].Besides, for its unique catalytic activities, NGE was also used in electrochemical sensors, while the real active sites are still *** instance, NGE has been used in the determination of aromatic phenol, and the dominant electro-catalysis active sites were also *** the determination of hydroquinone and catechol, pyridine-N dominant NGE showed higher electro-catalysis than the pyrrole-N dominant NGE, indicating pyridine-N the electro-catalysis active sites [4].Earlier, nitrogen-doped carbon nanotubes were devoted to the determination of acetaminophen(AP), while the main electro-active sites were not clear [5].Herein, the electro-catalysis of NGE towards the redox of AP was studied, and the quaternary-N, but not pyridine-N or pyrrole-N, may played a crucial *** enhanced electrochemical response can be obtained on NGE modified *** the superb catalysis, the NGE was employed in the determination of AP with a detection limit of 0.38μM.