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- Title
Study on Oxidation State Dependent Electrocatalytic Ability for I<sup>−</sup>/I<sub>3</sub><sup>−</sup> Redox Reaction of Reduced Graphene Oxides.
- Authors
Yeh, Min‐Hsin; Lin, Lu‐Yin; Huang, Tzu‐Yen; Chuang, Hui‐Min; Chu, Chih‐Wei; Ho, Kuo‐Chuan
- Abstract
The influence of oxidation states on electrocatalytic abilities for I3− 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 ( k0) and reasonable electrochemical surface area ( Ae) for I3− reduction, both are quantitatively determined by a rotating disk electrode system using the KouteckýLevich equation.
- Subjects
DYE-sensitized solar cells; GRAPHENE oxide; OXIDATION-reduction reaction; CHARGE transfer; ELECTRODES; ELECTROLYTES
- Publication
Electroanalysis, 2014, Vol 26, Issue 1, p147
- ISSN
1040-0397
- Publication type
Article
- DOI
10.1002/elan.201300321