One-step plasma electrochemical synthesis and oxygen electrocatalysis of nanocomposite of few-layer graphene structures with cobalt oxides

被引：16
作者：
Kotkin, A. S. [1 ]
Kochergin, V. K. [2 ]
Kabachkov, E. N. [1 ]
Shulga, Y. M. [1 ]
Lobach, A. S. [1 ]
Manzhos, R. A. [1 ]
Krivenko, A. G. [1 ]
机构：
[1] Russian Acad Sci, Inst Problems Chem Phys, Academician Semenov Av 1, Chernogolovka 142432, Russia
[2] Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119991, Russia
来源：
MATERIALS TODAY ENERGY | 2020年 / 17卷
基金：
俄罗斯科学基金会;
关键词：
Electrochemical exfoliation of graphite; Electrolytic plasma; Few-layer graphene structures; Cobalt oxides; Oxygen reduction reaction; ELECTRODE MATERIALS; REDUCTION REACTION; GRAPHITE; EXFOLIATION; CATALYSTS; NITROGEN; SPECTRA; FILMS;
D O I：
10.1016/j.mtener.2020.100459
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：
One-step synthesis of the nanocomposite of few-layer graphene structures with cobalt oxides was realized using the method of electrochemical exfoliation of graphite. The exfoliation process was carried out in alternating anodic-cathodic plasma mode in 1 M Na2SO4 + 0.01 M CoSO4 solution. Obtained nanocomposite was characterized by scanning and transmission electron microscopy, X-ray photoelectron and Raman spectroscopy. Besides, a catalytic activity of the nanocomposite of few-layer graphene structures with cobalt oxides towards the oxygen reduction reaction was assessed, and a considerable decrease in the oxygen reduction overpotential and an electron transfer number of ca. 3.6 were demonstrated. The observed effect was found to be caused by 40 wt% of cobalt (II) and (III) oxides in the nanocomposite. (C) 2020 Elsevier Ltd. All rights reserved.
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页数：8
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