Pseudocapacitance of α-CoMoO4 nanoflakes in non-aqueous electrolyte and its bi-functional electro catalytic activity for methanol oxidation
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Accepted version
Date
2015-10-23
Authors
Padmanathan, Narayanasamy
Shao, Han
Selladurai, Subramanian
Glynn, Colm
O'Dwyer, Colm
Razeeb, Kafil M.
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Published Version
Abstract
Nanocrystalline cobalt molybdate (CoMoO4) nanoflakes were grown directly on carbon fibre cloth (CFC) via a simple hydrothermal method without any template or surfactant. A symmetric supercapacitor was fabricated using CoMoO4 nanoflakes/CFC as both negative and positive electrodes. The device has delivered the maximum specific capacitance of 8.3 F g−1 at a constant current density of 1 A g−1 in organic electrolyte. It offers the reasonable energy (2.6 Wh kg−1) and power density (748.8 W kg−1) as comparable to the carbon based symmetric supercapacitors. As a catalyst for methanol oxidation, the CoMoO4 nanoflakes showed high current density (25 mA cm−2) and low onset potential (0.38 V). The impressive bi-functional electrochemical activity of CoMoO4 on CFC is mainly attributed to its porous microstructure, where reasonable electrical conductivity resulted from binder-free and intimate metal oxide/substrate integration.
Description
Keywords
Electrode , Symmetric supercapacitor , Electro-oxidation , Methanol fuel cell
Citation
Padmanathan, N., Shao, H., Selladurai, S., Glynn, C., O'Dwyer, C. and Razeeb, K. M. (2015) 'Pseudocapacitance of α-CoMoO4 nanoflakes in non-aqueous electrolyte and its bi-functional electro catalytic activity for methanol oxidation', International Journal of Hydrogen Energy, 40(46), pp. 16297-16305. doi: 10.1016/j.ijhydene.2015.09.127