Irshad, Ahamed and Munichandraiah, Nookala (2014) An oxygen evolution Co-Ac catalyst - the synergistic effect of phosphate ions. In: PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 16 (11). pp. 5412-5422.
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Abstract
Formation of an amorphous cobalt based oxygen evolution catalyst called Co-Pi has been recently reported from a neutral phosphate buffer solution containing Co2+. But the concentration of Co2+ is as low as 0.5 mM due to poor solubility of a cobalt salt in phosphate medium. In the present study, a cobalt acetate based oxygen evolution catalyst (Co-Ac) is prepared from a neutral acetate buffer solution, where the solubility of Co2+ is very high (>100 times in comparison with phosphate buffer solution). The Co-Ac possesses better catalytic activity than the Co-Pi with an additional advantage of easy bulk scale preparation. The comparative studies on the oxygen evolution reaction (OER) activity of Co-Ac and Co-Pi in phosphate and acetate buffer electrolytes reveal that the Co-Ac exhibits enhanced synergistic catalytic activity in phosphate solution, probably due to partial substitution of acetate in the catalyst layer by phosphate, resulting in the formation of a Co-Ac-Pi catalyst.
| Item Type: | Journal Article |
|---|---|
| Publication: | PHYSICAL CHEMISTRY CHEMICAL PHYSICS |
| Publisher: | ROYAL SOC CHEMISTRY |
| Additional Information: | Copyright for this article belongs to the ROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE, ENGLAND |
| Department/Centre: | Division of Chemical Sciences > Inorganic & Physical Chemistry |
| Date Deposited: | 01 May 2014 08:55 |
| Last Modified: | 01 May 2014 08:56 |
| URI: | http://eprints.iisc.ac.in/id/eprint/48928 |
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