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Preparation of cobalt oxides on carbon fiber paper and its application in electrocatalytic oxygen evolution reaction
Received date: 2019-07-25
Online published: 2020-02-26
The design of electrocatalytic oxygen evolution reaction（OER） electrodes materials with high efficiency and low cost is of great significance to enhance the performance of electrochemical energy conversion and storage systems in large scale.Two kinds of cobalt oxides,such as CoO and Co3O4,on carbon fiber paper （CFP） were synthesized via solvothermal method and calcination in different atmosphere and applied them as OER electrodes.X-ray diffraction（XRD）,field emission scanning electron microscope（FESEM） and X-ray photoelectron spectroscopy（XPS） were used to characterize and analyze the phases,morphology and surface valence of the as-prepared cobalt oxides samples.Results showed that CoO nanosheet was obtained by calcination in nitrogen atmosphere,while Co3O4 nanosheet was obtained in air atmosphere.Linear sweep voltammetry（LSV）,cyclic voltammgrams（CV）,electrochemical impedance spectroscopy（EIS） and chronopotentiometric measurements were used to investigate the as-prepared cobalt oxides samples for OER performance.Results indicated that CoO electrode exhibited better OER activity and stability compared to that of Co3O4 electrode.In 1 mol/L KOH electrolyte,CoO and Co3O4 electrodes require 1.568 V and 1.617 V at a current density of 10 mA/cm 2,respectively.
Key words： carbon fiber paper; Co3O4; CoO; electrocatalytic
Shixin Mai , Gao Cheng , Lin Yu , Ming Sun . Preparation of cobalt oxides on carbon fiber paper and its application in electrocatalytic oxygen evolution reaction[J]. Inorganic Chemicals Industry, 2020 , 52(1) : 87 -92 . DOI: 10.11962/1006-4990.2019-0121
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