Electrocatalytic Activity of Graphene Multi layers toward I-/I3-: Effect of Preparation Conditions and Polyelectrolyte Modification

被引：59

作者：

Hasin, Panitat ^{[1
]}

Alpuche-Aviles, Mario A. ^{[1
]}

Wu, Yiying ^{[1
]}

机构：

[1] Ohio State Univ, Dept Chem, Columbus, OH 43210 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 37期

关键词：

COUNTER ELECTRODE; SOLAR-CELLS; GRAPHITE; TRANSPARENT; FILMS; OXIDE; REDUCTION; TIO2; PARTICLES; DISORDER;

D O I：

10.1021/jp106130v

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Graphene films have been used as transparent conductive electrodes (TCEs) and counter electrodes in dye-sensitized solar cells (DSCs) in order to reduce the cost of fabrication. This work reports the fundamental electrocatalytic properties of graphene films toward I-/I-3(-) by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The films were prepared from chemical or thermal reduction of graphene oxide. We demonstrate that graphene films obtained under different reduction conditions exhibit different electrocatalytic properties. The mechanism is elucidated by the structural differences as confirmed by X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. We also show that the electrocatalytic activity of graphene films could be tuned by surface modification with polyelectrolytes.

引用

收藏

页码：15857 / 15861

页数：5

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