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Light-induced water oxidation by polymorphs of the Zn–Co–Ni oxide spinel catalyst: a comparative study

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Abstract

Spinel-type cobalt substituted Zn0.2Ni0.8Co2O4 exhibits high activity and stability for the oxygen evolution reaction. The two different dimensions (1D and 3D) of Zn0.2Ni0.8Co2O4 were explored in the photochemical water oxidation reaction. The 3D highly porous microspheres (MPS) were catalytically more active compared to the mesoporous 1D rods (MPR). The MPS form shows high turnover numbers than that of the MPR under similar experimental conditions. After each oxidation reaction, both the catalysts MPR and MPS (1D and 3D) were characterized and it was proved that the compounds were stable after the catalytic cycle. Further, it was found that the catalysts could be reused and recycled for several catalytic cycles. Hence, these simple catalysts Zn0.2Ni0.8Co2O4 (1D and 3D) could be proposed for application in artificial photosynthesis, as they work efficiently in the light-driven water oxidation process. Zn–Ni–Co oxide was explored for the first time as a catalyst in the water oxidation reaction.

Graphical abstract: Light-induced water oxidation by polymorphs of the Zn–Co–Ni oxide spinel catalyst: a comparative study

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Publication details

The article was received on 02 Nov 2018, accepted on 16 Jan 2019 and first published on 17 Jan 2019


Article type: Paper
DOI: 10.1039/C8SE00536B
Citation: Sustainable Energy Fuels, 2019, Advance Article

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    Light-induced water oxidation by polymorphs of the Zn–Co–Ni oxide spinel catalyst: a comparative study

    R. Sakla, R. Kaushik, V. Kumar, D. A. Jose, A. Ghosh and C. R. Mariappan, Sustainable Energy Fuels, 2019, Advance Article , DOI: 10.1039/C8SE00536B

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