Vineesh, T.V. and Archana, S. and Rajappa, S. and Pal, S. and Alwarappan, S. and Narayanan, TN. (2017) Non-Precious Metal/Metal Oxides & Nitrogen Doped Reduced Graphene Oxide based Alkaline Water Electrolysis Cell. CHEMCATCHEM. ISSN 1867-3880 (In Press)

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Development of strategies for water electrolysis half-cell reaction catalysts without the use of precious metals/metal oxides and the synergistic compilation of catalysts for the full cell fabrication are receiving tremendous scientific attention. Here, alkaline water electrolysis full cells are developed with novel spongy catalysts for both anode and cathode reactions - such as Co3O4-nitrogen doped reduced graphene oxide (Co3O4/NrGO) composite sponge for Oxygen Evolution Reaction (OER) and nickel-nitrogen doped reduced graphene oxide (NiNrGO) for hydrogen evolution reaction (HER). The performance of OER catalyst developed - Co3O4/NrGO, is compared with the commercial one (IrO2) in alkaline medium with a common benchmark cathode catalyst (Pt) and an augmented full cell performance is shown from this novel combination (320 mAcm-2 at an operating voltage of 1.9 V for Co3O4/NrGO, while 199 mA/cm-2 for IrO2). A water electrolysis full cell is developed without the use of HER catalyst Pt rather using a porous spongy catalyst - NiNrGO,having a low operating potential with a high stability (270 mAcm-2 at an operating voltage of 1.9 V with a stability tested for more than 9 hours), and this works opens up the possibilities of designing lightweight water electrolysis cells without the use of commercial benchmark precious catalysts.

Item Type: Article
Uncontrolled Keywords: non-precious metal oxides; graphene oxide; electrolysis cell
Subjects: Electrodics and Electrocatalysis
Depositing User: Dr. N Meyyappan
Date Deposited: 27 Sep 2017 09:45
Last Modified: 27 Sep 2017 09:45

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