Kumar, Manoj and Awasthi, R and Pramanick, A K and Singh, R N (2011) New ternary mixed oxides of Fe, Ni and Mo for enhanced oxygen evolution. International Journal of Hydrogen Energy, 36 (20). pp. 12698-12705.
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Ternary mixed oxides of Fe, Ni and Mo with molecular formulas FexNi1−xMoO4 (x = 0.25, 0.50 and 0.75) have been prepared by a co-precipitation method and investigated for their structural and electrocatalytic properties by XRD, AFM, electrochemical impedance spectroscopy and anodic Tafel polarization. Results indicate that the apparent oxygen evolution activity of the base (NiMoO4) electrode significantly increases with introduction of Fe from 0.25 to 0.75 mol. The Tafel slope for the oxygen evolution reaction at low overpotentials is found to be only ∼35 mV on Fe-substituted oxides, while it was ∼75 mV on the base oxide. The reaction follows the first order kinetics with respect to OH− concentration, regardless of Fe content in the oxide.
|Uncontrolled Keywords:||Ternary mixed oxides; Oxygen evolution reaction; Electrocatalytic properties; Specific activity|
|Divisions:||Metal Extraction and Forming|
|Deposited By:||Dr. A K Sahu|
|Deposited On:||05 Nov 2011 12:59|
|Last Modified:||21 Nov 2011 12:35|
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