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Optimal metal domain size for photocatalysis with hybrid semiconductor-metal nanorods

Author

Listed:
  • Yuval Ben-Shahar

    (The Institute of Chemistry and Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Edmond Safra Campus Givat-Ram, Jerusalem 91904, Israel)

  • Francesco Scotognella

    (IFN-CNR, Politecnico di Milano)

  • Ilka Kriegel

    (IFN-CNR, Politecnico di Milano)

  • Luca Moretti

    (IFN-CNR, Politecnico di Milano)

  • Giulio Cerullo

    (IFN-CNR, Politecnico di Milano)

  • Eran Rabani

    (University of California and Lawrence Berkeley National Laboratory
    The Sackler Institute for Computational Molecular and Materials Science, Tel Aviv University)

  • Uri Banin

    (The Institute of Chemistry and Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Edmond Safra Campus Givat-Ram, Jerusalem 91904, Israel)

Abstract

Semiconductor-metal hybrid nanostructures offer a highly controllable platform for light-induced charge separation, with direct relevance for their implementation in photocatalysis. Advances in the synthesis allow for control over the size, shape and morphology, providing tunability of the optical and electronic properties. A critical determining factor of the photocatalytic cycle is the metal domain characteristics and in particular its size, a subject that lacks deep understanding. Here, using a well-defined model system of cadmium sulfide-gold nanorods, we address the effect of the gold tip size on the photocatalytic function, including the charge transfer dynamics and hydrogen production efficiency. A combination of transient absorption, hydrogen evolution kinetics and theoretical modelling reveal a non-monotonic behaviour with size of the gold tip, leading to an optimal metal domain size for the most efficient photocatalysis. We show that this results from the size-dependent interplay of the metal domain charging, the relative band-alignments, and the resulting kinetics.

Suggested Citation

  • Yuval Ben-Shahar & Francesco Scotognella & Ilka Kriegel & Luca Moretti & Giulio Cerullo & Eran Rabani & Uri Banin, 2016. "Optimal metal domain size for photocatalysis with hybrid semiconductor-metal nanorods," Nature Communications, Nature, vol. 7(1), pages 1-7, April.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms10413
    DOI: 10.1038/ncomms10413
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    Cited by:

    1. Li Zhai & Sara T. Gebre & Bo Chen & Dan Xu & Junze Chen & Zijian Li & Yawei Liu & Hua Yang & Chongyi Ling & Yiyao Ge & Wei Zhai & Changsheng Chen & Lu Ma & Qinghua Zhang & Xuefei Li & Yujie Yan & Xiny, 2023. "Epitaxial growth of highly symmetrical branched noble metal-semiconductor heterostructures with efficient plasmon-induced hot-electron transfer," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    2. Wang, Peifang & Wu, Tengfei & Ao, Yanhui & Wang, Chao, 2019. "Fabrication of noble-metal-free CdS nanorods-carbon layer-cobalt phosphide multiple heterojunctions for efficient and robust photocatalyst hydrogen evolution under visible light irradiation," Renewable Energy, Elsevier, vol. 131(C), pages 180-186.

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