NiO nanoparticles on graphene nanosheets at different calcination temperatures as effective electrocatalysts for urea electro-oxidation in alkaline medium

被引：61

作者：

Hameed, R. M. Abdel ^{[1
]}

Medany, Shymaa S. ^{[1
]}

机构：

[1] Cairo Univ, Fac Sci, Chem Dept, Giza, Egypt

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2017年 / 508卷

关键词：

Urea; NiO; Electro-oxidation; Alkaline medium; Calcination temperature; NICKEL-OXIDE NANOPARTICLES; METHANOL OXIDATION; ELECTROCHEMICAL DECOMPOSITION; ANODIC-OXIDATION; CARBON; ELECTRODE; HYDROXIDE; CATALYSTS; GLUCOSE; NANOCOMPOSITES;

D O I：

10.1016/j.jcis.2017.08.048

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：

NiO nanoparticles were supported on graphene nanosheets (NiO/Gr) through coprecipitation step of Ni (OH)(2) species, followed by calcination at different temperature values. The formed nanocomposites were characterized by employing X-ray diffraction (XRD) and transmission electron microscopy (TEM) to investigate their crystalline structure and morphology. The effect of varying the calcination temperature during the preparation of NiO/Gr electrocatalyst on some kinetic parameters in 0.5 M NaOH solution was studied. The electrocatalytic activity of synthesized electrocatalysts was examined for urea electro-oxidation reaction in alkaline solution using cyclic voltammetry, chronoamperometry and electrochemical impedance spectroscopy. Among the fabricated NiO/Gr electrocatalysts, the one that was heated at 200 degrees C exhibited the highest urea oxidation current density value with most stable performance for long time. (C) 2017 Elsevier Inc. All rights reserved.

引用

页码：291 / 302

页数：12

共 56 条

[1] Synthesis and Characterizations of Electroless Oil Palm Shell Based-Activated Carbon/Nickel Oxide Nanocomposite Electrodes for Supercapacitor Applications [J].