Synthesis of Graphite Oxide/Cobalt Molybdenum Oxide Hybrid Nanosheets for Enhanced Electrochemical Performance in Supercapacitors and the Oxygen Evolution Reaction

被引：55

作者：

Ahmed, Jahangeer ^{[1
]}

Ubaidullah, Mohd ^{[1
]}

Ahmad, Tokeer ^{[2
]}

Alhokbany, Norah ^{[1
]}

Alshehri, Saad M. ^{[1
]}

机构：

[1] King Saud Univ, Dept Chem, Coll Sci, Riyadh 11451, Saudi Arabia

[2] Jamia Millia Islamia, Nanochem Lab, Dept Chem, New Delhi 110025, India

来源：

CHEMELECTROCHEM | 2019年 / 6卷 / 09期

关键词：

nanocomposites; oxides; supercapacitors; oxygen evolution reaction; hybrid materials; ELECTROCATALYTIC OXYGEN; COBALT MOLYBDATE; ELECTRODE MATERIAL; COMOO4; NANORODS; WATER; EFFICIENT; NANOCOMPOSITES; COWO4; FABRICATION; NANOTUBES;

D O I：

10.1002/celc.201900055

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Reduced graphite oxide (rGO)/cobalt molybdenum oxide (CoMoO4) hybrid nanosheets (NSs) have been prepared by using the hydrothermal method followed by detailed characterization with X-ray diffraction, electron microscopy, Raman and FTIR spectroscopy. The unusual rGO/CoMoO4 hybrid NSs allow the electrochemical reactions of electrodes for supercapacitors. Therefore, an excellent specific capacitance (ca. 450F/g at 2mV/s) and stability performance of the rGO/CoMoO4 hybrid NSs were observed in alkaline medium (i.e. 5 M KOH electrolyte). The rGO/CoMoO4 hybrid NSs show five times higher specific capacitance compared to pure CoMoO4 NSs. The cyclic stability of the rGO/CoMoO4 hybrid NSs reveals retention of approximately 98% of the initial capacitance after 1500 cycles. Moreover, the rGO/CoMoO4 hybrid electrocatalyst shows higher oxygen evolution activity than CoMoO4 NSs in 0.1M KOH versus Ag/AgCl. Cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), linear sweep voltammetry (LSV), and chronoamperometric (CA) measurements strongly support the enhanced electrochemical performance of the rGO/CoMoO4 hybrid NSs.

引用

页码：2524 / 2530

页数：7

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