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PtNixCoy concave nanocubes: synthesis and application in photocatalytic hydrogen generation

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Abstract

PtNixCoy concave nanocubes (CNCs) are synthesized using a hydrothermal method and decorated on the surface of CdS via a fast photo-deposition method (denoted as PtNixCoy/CdS). The photocatalytic hydrogen evolution activity is investigated under visible light irradiation, and Pt/CdS exhibits a good hydrogen generation rate of about 37.80 mmol h−1 g−1 (QE = 44.64%, λ = 420 nm). Moreover, the performance of the PtNixCoy CNCs is enhanced with the addition of Ni and Co, and the hydrogen generation rate of PtNiCo/CdS is as high as 50.60 mmol h−1 g−1 (QE = 56.82%, λ = 420 nm), which is 1.3-fold higher than that of Pt/CdS and also significantly higher than those of PtNi/CdS (42.71 mmol h−1 g−1) and PtCo0.5/CdS (40.33 mmol h−1 g−1). The high photocatalytic performance could be explained by the high surface index and the highly unsaturated atom coordination of PtNiCo CNCs, and the synergistic effects of the tri-metals, which enhance the capturing ability of photo-generated electrons, and finally result in high charge separation and high charge transport between the alloy CNCs and CdS at the interface.

Graphical abstract: PtNixCoy concave nanocubes: synthesis and application in photocatalytic hydrogen generation

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Publication details

The article was received on 27 Sep 2019, accepted on 18 Nov 2019 and first published on 18 Nov 2019


Article type: Paper
DOI: 10.1039/C9CY01958H
Catal. Sci. Technol., 2019, Advance Article

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    PtNixCoy concave nanocubes: synthesis and application in photocatalytic hydrogen generation

    X. Jia, S. Liu, L. Huang, P. Devaraji, L. Walekar, W. Chen, X. Li, S. Liu and L. Mao, Catal. Sci. Technol., 2019, Advance Article , DOI: 10.1039/C9CY01958H

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