期刊
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
卷 17, 期 9, 页码 2511-2519出版社
SPRINGER
DOI: 10.1007/s10008-013-2130-3
关键词
Graphene; Formic acid oxidation; Electrodeposition; Bimetallic catalyst; Electrocatalysis
资金
- National Natural Science Foundation of China [51073114, 20933007]
- Xinjiang Key Laboratory of Electronic Information Materials and Devices [XJYS0901-2010-01]
- Soochow University
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
A simple electrochemical approach is developed to prepare reduced graphene oxide (RGO)-wrapped carbon fiber (CF) as a novel support for Pt-Au nanocatalysts. The obtained composite electrodes have been characterized by scanning electron microscopy (SEM), X-ray energy dispersive spectroscopy (EDX), thermal gravimetric analysis (TGA), and electrochemical methods. SEM images reveal that the Pt-Au nanoparticles deposited on RGO-wrapped CF (RGO/CF) electrode display smaller particle size and more uniform dispersion than those on the bare CF electrode. Cyclic voltammetry, linear sweep voltammetry, chronoamperometry, chronopotentiometry, Tafel plots, and electrochemical impedance spectroscopy (EIS) analyses demonstrate that the introduced RGO on CF electrode surface is beneficial to the dispersion of Pt-Au nanoparticles, as a consequence, to the enhancement of the electrocatalytic activity and the antipoisoning ability of Pt-Au towards formic acid electrooxidation.
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