溶液相合成卤化石墨烯及其对氧化还原反应的电催化活性(英文)

作     者：Kuang-Hsu Wu Da-Wei Wang Qingcong Zeng Yang Li Ian R.Gentle 

作者机构：School of Chemistry and Molecular Biosciences The University of Queensland Brisbane 4072 Australia School of Chemical Engineering UNSW Australia (The University of New South Wales) Sydney NSW 2052 Australia 

出 版 物：《催化学报》 (Chinese Journal of Catalysis)

年 卷 期：2014年第35卷第6期

页      面：884-890页

核心收录：

学科分类：081705[工学-工业催化] 0817[工学-化学工程与技术] 08[工学] 0703[理学-化学] 

基　　金：financial support from The University of Queensland and the Australian Research Council Discovery Project (DP110100550) 

主　　题：氧还原反应 液相合成 电催化活性 卤代 氧化石墨 还原活性 掺杂石墨 安全性问题 

摘      要：Metal-free carbon electrocatalyts for the oxygen reduction reaction (ORR) are attractive for their high activity and economic advantages. However, the origin of the activity has never been clearly elucidated in a systematic manner. Halogen group elements are good candidates for elucidating the effect, although it has been a difficult task due to safety issues. In this report, we demonstrate the synthesis of Cl-, Br- and I-doped reduced graphene oxide through two solution phase syntheses. We have evaluated the effectiveness of doping and performed electrochemical measurements of the ORR activity on these halogenated graphene materials. Our results suggest that the high electroneg-ativity of the dopant is not the key factor for high ORR activity; both Br- and I-doped graphene promoted ORR more efficiently than Cl-doped graphene. Furthermore, an unexpected sulfur-doping in acidic conditions suggests that a high level of sulfide can degrade the ORR activity of the graphene material.