Study on oxidation state dependent electrocatalytic ability for I-/I3 - redox reaction of reduced graphene oxides
Journal
Electroanalysis
Journal Volume
26
Journal Issue
1
Pages
147-155
Date Issued
2014
Author(s)
Abstract
Abstract The influence of oxidation states on electrocatalytic abilities for I 3 − reduction is discussed for reduced graphene oxide (rGO), which is a promising catalyst of counter electrodes for dye‐sensitized solar cells (DSSCs). The oxidation states of rGO can be controlled via a photothermal reduction process by varying exposure times. The results reveal that the rGO with lower oxidation state shows smaller charge transfer resistance at the electrode/electrolyte interface and better electrocatalytic ability attributed to higher standard heterogeneous rate constant ( k 0 ) and reasonable electrochemical surface area ( A e ) for I 3 − reduction, both are quantitatively determined by a rotating disk electrode system using the KouteckýLevich equation.
SDGs
Type
journal article