碳纸负载钴氧化物的制备及电催化析氧性能研究

doi:10.11962/1006-4990.2019-0121

Abstract

Abstract:

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

CLC Number:

TQ138.12

Mai Shixin,Cheng Gao,Yu Lin,Sun Ming. 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.

Figures/Tables 7

References 22

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催化剂	基底	电解液	10 mA/cm²下的过电势/mV	Tafel 斜率/ （mV·dec^-1）
CoO纳米片	碳纸	1.0 mol/L KOH	338	73.9
Co₃O₄纳米片	碳纸	1.0 mol/L KOH	387	85.0
CoO 纳米片^[9]	玻碳电极	1.0 mol/L KOH	320	70.0
CoO 纳米片/石墨烯^[10]	泡沫镍	0.1mol/L KOH	330	79.0
CoO/Mn₃O₄^[11]	玻碳电极	1.0 mol/L KOH	378	95.0
Co₃O₄纳米线^[12]	泡沫镍	1.0 mol/L KOH	339	82.0
Co₃O₄ 纳米棒^[13]	碳纸	1.0 mol/L KOH	370	105.0
还原氧化石墨烯- Co₃O₄ 纳米笼^[14]	玻碳电极	0.1mol/L KOH	410	84.9

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Inorganic Acid-Base-Salt Committee of CIESC

Preparation of cobalt oxides on carbon fiber paper and its application in electrocatalytic oxygen evolution reaction

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