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)  

Solution phase synthesis of halogenated graphene and the electrocatalytic activity for oxygen reduction reaction

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

机构地区：[1]School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia [2]School of Chemical Engineering, UNSW Australia (The University of New South Wales), Sydney, NSW 2052, Australia

出　　处：《催化学报》2014年第6期884-890,共7页

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

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.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 CI-, 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 pro- moted 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.

关 键 词：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 

分 类 号：O643.32[理学—物理化学]