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Photoinduced formation of Cu@Cu2O@C plasmonic nanostructures with efficient interfacial charge transfer for hydrogen evolution

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Abstract

Semiconducting oxide encapsulated plasmonic-metal nanostructures have the advantage of a wide spectral response by combining intrinsic light absorption and resonant energy transfer over their individual components. However, these nanostructures, which are usually prepared by a series of complex steps under harsh conditions, still suffer from inefficient interfacial charge transfer in (photo)-electrochemical and photocatalytic applications because of the degradation and photocorrosion of narrow-band-gap semiconductors. Here, we demonstrate that carbon-encapsulated Cu@Cu2O nanostructures can homogeneously grow through stepwise spontaneous formation from a cupric ion-containing aqueous alcoholic solution induced by irradiation. The unique Cu@Cu2O@C nanostructures in situ synthesized from photocatalytic systems for hydrogen generation can significantly improve solar-light harvesting, effectively prevent Cu2O photocorrosion, and greatly reduce the trap states to reduce charge recombination. By virtue of these merits, the Cu@Cu2O@C nanostructures exhibit efficient and stable hydrogen generation for both (photo)-electrochemical and photocatalytic applications.

Graphical abstract: Photoinduced formation of Cu@Cu2O@C plasmonic nanostructures with efficient interfacial charge transfer for hydrogen evolution

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Publication details

The article was received on 01 Jun 2019, accepted on 24 Jul 2019 and first published on 27 Jul 2019


Article type: Paper
DOI: 10.1039/C9TA05846J
J. Mater. Chem. A, 2019, Advance Article

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    Photoinduced formation of Cu@Cu2O@C plasmonic nanostructures with efficient interfacial charge transfer for hydrogen evolution

    N. Li, W. Yan, W. Zhang, Z. Wang and J. Chen, J. Mater. Chem. A, 2019, Advance Article , DOI: 10.1039/C9TA05846J

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