Single Step Synthesis of Porous NiCoO₂ for Effective Electrooxidation of Glycerol in Alkaline Medium

Herein, we report the electrooxidation of glycerol in alkaline media in presence of highly active and durable NiCoO₂ catalyst synthesized using single step solution combustion synthesis (SCS) and compare its activity with NiO and Co₃O₄ prepared using the same method. X-ray diffraction (XRD), X-Ray Photoelectron Spectroscopy (XPS), Scanning electron microscopy (SEM) with EDS and Transmission electron microscopy (TEM) along with EDS elemental/phase mapping were used to analyze the crystallinity, morphology and phase composition of the synthesized particles. TEM image with phase mapping confirms the existence of mixed NiCoO₂ and these materials shows enhanced performance when compared with individual metal oxides. The onset potential of NiCoO₂ is much lower and the oxidation current density obtained is relatively higher. More importantly, the current density and stability of NiCoO₂ obtained from chronoamperometry makes it a promising catalyst for glycerol based fuel cells.

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Published in: Journal of The Electrochemical Society
License: http://creativecommons.org/licenses/by/4.0/
See article on publisher's website: https://dx.doi.org/10.1149/2.0401815jes