Reduced graphene oxide-supported nickel oxide catalyst with improved CO tolerance for formic acid electrooxidation |
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Authors: | M. Kaleesh Kumar Niki S. Jha S. Mohan Shailendra K. Jha |
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Affiliation: | 1. CSIR – Central Electrochemical Research Institute, Karaikudi, Tamil Nadu, India;2. Molecular Biophysics Unit, Indian Institute of Science, Bangalore, India |
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Abstract: | The superior catalytic activity along with improved CO tolerance for formic acid electrooxidation has been demonstrated on a NiO-decorated reduced graphene oxide (rGO) catalyst. The cyclic voltammetry response of rGO–NiO/Pt catalyst elucidates improved CO tolerance and follows direct oxidation pathway. It is probably due to the bene?cial effect of residual oxygen groups on rGO support which is supported by FT-IR spectrum. A strong interaction of rGO support with NiO nanoparticles facilitates the removal of CO from the catalyst surface. The chronoamperometric response indicates a higher catalytic activity and stability of rGO–NiO/Pt catalyst than the NiO/Pt and unmodified Pt electrode catalyst for a prolonged time of continuous oxidation of formic acid. |
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Keywords: | Direct formic acid fuel cell (DFAFC) Formic acid oxidation Reduced graphene oxide (rGO) support rGO-NiO nanocomposite |
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