NiO-Fe2O3 based graphene aerogel as urea electrooxidation catalyst

被引：62

作者：

Das, Gautam ^{[1
]}

Tesfaye, Robel Mehari ^{[1
]}

Won, Yusun ^{[1
]}

Yoon, Hyon Hee ^{[1
]}

机构：

[1] Gachon Univ, Dept Chem & Biol Engn, 1342 Seongnam Dearo, Gyeonggi Do 461701, South Korea

来源：

ELECTROCHIMICA ACTA | 2017年 / 237卷

关键词：

Aerogel; Reduced graphene oxide; Urea oxidation; Electrocatalyst; Self assembly; EFFECTIVE ELECTROCATALYST; FACILE SYNTHESIS; NICKEL; ELECTRODE; ARRAYS; NANOSHEETS; OXIDE; FOAM; MORPHOLOGY; ANODE;

D O I：

10.1016/j.electacta.2017.03.197

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A NiO-Fe2O3 based graphene aerogel was employed as a novel catalyst material for the electrochemical oxidation of urea. The three-dimensional aerogels were synthesized by metal ions (Ni2+ and Fe3+)-induced self-assembly using poly(vinyl alcohol) (PVA) as the structural scaffold. The NiO-Fe2O3/rGO/ PVA aerogels were characterized by scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The catalytic performance of the aerogels for urea electrooxidation in an alkaline medium was investigated by cyclic voltammetry. The NiO-Fe2O3/rGO/PVA aerogel electrode exhibited significant reduction of the onset oxidation potential (similar to 90 mV) compared to that of NiO/rGO/PVA. The NiO-Fe2O3/rGO/PVA aerogel electrode showed a peak current density of 44.6 mA cm(-2) at 0.33 M urea in 1.0 M KOH, which was 2.6-fold higher than that of NiO/rGO/PVA electrode. Moreover, the NiO-Fe2O3/rGO/PVA electrode showed only a 11% loss in the peak current after 200th cycles. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：171 / 176

页数：6

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