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An efficient difunctional photocatalyst prepared in situ from Prussian blue analogues for catalytic water oxidation and visible light absorption

Abstract

The photocatalytic water oxidation reaction (WOR) usually require the using of a noble metal catalyst as well as a photosensitizer, therefore developing new type of non-noble metal and photosensitizer-free catalysts is of great significience for photocatalytic WOR. In this paper, a facile paradigm for designing photosensitizer-free difunctional catalysts from an old fashion cubic MOFs - Prussian blue analogues (PBAs) was presented. The as-prepared Co(OH)2 modified CuO (Co(OH)2/CuO) nanoparticles displayed a robust catalytic efficiency (3567 μmol·h-1·g-1) toward visible-light-driven water oxidation reaction (WOR). Intriguingly, insights into the WOR pathway indicate that the Co(OH)2/CuO nanoparticles could serve as both water oxidation catalysts and visible light absorption centers and they still showed photocatalytic performance at monochromatic light 765 nm and maintained 64.2% oxygen evolution comparing to the light cutting off 420 nm. The Co(OH)2/CuO nanoparticles was quite stable in the reaction system via characterizing properties before and after the reactions. While the synergetic effect between Co(OH)2 and CuO clusters is the key to the abnormal photocatalytic activity of this catalyst in the complicate WOR process. We hope that this contribution will serve as a useful template for other researchers to design new transition metal catalysts for WOR.

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Publication details

The article was received on 04 Aug 2018, accepted on 02 Oct 2018 and first published on 05 Oct 2018


Article type: Paper
DOI: 10.1039/C8CY01620H
Citation: Catal. Sci. Technol., 2018, Accepted Manuscript
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    An efficient difunctional photocatalyst prepared in situ from Prussian blue analogues for catalytic water oxidation and visible light absorption

    J. Guo, H. Li, D. Wang, L. Zhang, Y. Ma, N. Akram, Y. Zhang and J. Wang, Catal. Sci. Technol., 2018, Accepted Manuscript , DOI: 10.1039/C8CY01620H

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