Premium
Analysis of Electrochemical Reduction Process of Graphene Oxide and its Electrochemical Behavior
Author(s) -
Gao Mingming,
Xu Yanyan,
Wang Xinhua,
Sang Yuanhua,
Wang Shuguang
Publication year - 2016
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201501063
Subject(s) - electrochemistry , redox , graphene , chemistry , conductivity , oxide , desorption , inorganic chemistry , electrode , materials science , adsorption , nanotechnology , organic chemistry
In this study, the electrochemical reduction process of GO was investigated with structural and electrochemical analysis on a series of step‐reduced ERGOs. Firstly, the disorder of ERGO decreased and its electron conductivity increased significantly at the initial reduction period, from 0 to −0.5 V, together with the desorption of hydroxyl and the formation of carboxyl. Then OCOH was completely reduced to CO at the potential between −1.0 V and −1.4 V. Finally, reduction of CO was observed from −1.6 V to −1.8 V. On the other hand, the step‐reduced ERGO with gradually varying surficial electrochemical properties gave the opportunity for the analysis of a given redox system. The [Fe(CN) 6 ] 3−/4− redox reaction was sensitive to the conductivity of modified ERGOs, but insensitive to the oxy‐functional groups. Oppositely, the Q/HQ redox reaction was mainly effected by the quantity of carboxyl. The oxidation of AA was affected by both the conductivity and oxy‐functional groups. Otherwise, electrostatic interaction was exhibited between reactant and ERGOs for all these three reactions.