Visible light photo-oxidation in Au nanoparticle sensitized SrTiO 3:Nb photoanode

Tian Ming; Jin Suntivich; Kevin J. May; Kelsey A. Stoerzinger; Dong Ha Kim; Yang Shao-Horn

doi:10.1021/jp404148d

Visible light photo-oxidation in Au nanoparticle sensitized SrTiO ₃:Nb photoanode

Tian Ming, Jin Suntivich, Kevin J. May, Kelsey A. Stoerzinger, Dong Ha Kim, Yang Shao-Horn

Department of Chemistry & Nanoscience

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

Au nanoparticle decorated SrTiO₃:Nb (Au/SrTiO₃:Nb) has been demonstrated as a photoanode for photo-oxidation under visible light. The visible light photo-oxidation is a result of the generation of the hot electrons in the Au nanoparticles, which are subsequently injected into the SrTiO₃:Nb conduction band. This leaves behind holes for electrochemical oxidation, which can oxidize a variety of chemical species with redox potentials ranging from 0 to 1.23 V vs RHE. The visible light response is most enhanced at the surface plasmon resonance energy of the Au nanoparticles, which we believe reflect the high optical density near the plasmon resonance for the sensitization. This work demonstrates a general route to impart visible light utilization to a wide band gap semiconductor for various energy conversion and environmental applications, including solar fuel generation and organic pollutant decomposition.

Original language	English
Pages (from-to)	15532-15539
Number of pages	8
Journal	Journal of Physical Chemistry C
Volume	117
Issue number	30
DOIs	https://doi.org/10.1021/jp404148d
State	Published - 1 Aug 2013

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abstract = "Au nanoparticle decorated SrTiO3:Nb (Au/SrTiO3:Nb) has been demonstrated as a photoanode for photo-oxidation under visible light. The visible light photo-oxidation is a result of the generation of the hot electrons in the Au nanoparticles, which are subsequently injected into the SrTiO3:Nb conduction band. This leaves behind holes for electrochemical oxidation, which can oxidize a variety of chemical species with redox potentials ranging from 0 to 1.23 V vs RHE. The visible light response is most enhanced at the surface plasmon resonance energy of the Au nanoparticles, which we believe reflect the high optical density near the plasmon resonance for the sensitization. This work demonstrates a general route to impart visible light utilization to a wide band gap semiconductor for various energy conversion and environmental applications, including solar fuel generation and organic pollutant decomposition.",

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AU - Ming, Tian

AU - Suntivich, Jin

AU - May, Kevin J.

AU - Stoerzinger, Kelsey A.

AU - Kim, Dong Ha

AU - Shao-Horn, Yang

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N2 - Au nanoparticle decorated SrTiO3:Nb (Au/SrTiO3:Nb) has been demonstrated as a photoanode for photo-oxidation under visible light. The visible light photo-oxidation is a result of the generation of the hot electrons in the Au nanoparticles, which are subsequently injected into the SrTiO3:Nb conduction band. This leaves behind holes for electrochemical oxidation, which can oxidize a variety of chemical species with redox potentials ranging from 0 to 1.23 V vs RHE. The visible light response is most enhanced at the surface plasmon resonance energy of the Au nanoparticles, which we believe reflect the high optical density near the plasmon resonance for the sensitization. This work demonstrates a general route to impart visible light utilization to a wide band gap semiconductor for various energy conversion and environmental applications, including solar fuel generation and organic pollutant decomposition.

AB - Au nanoparticle decorated SrTiO3:Nb (Au/SrTiO3:Nb) has been demonstrated as a photoanode for photo-oxidation under visible light. The visible light photo-oxidation is a result of the generation of the hot electrons in the Au nanoparticles, which are subsequently injected into the SrTiO3:Nb conduction band. This leaves behind holes for electrochemical oxidation, which can oxidize a variety of chemical species with redox potentials ranging from 0 to 1.23 V vs RHE. The visible light response is most enhanced at the surface plasmon resonance energy of the Au nanoparticles, which we believe reflect the high optical density near the plasmon resonance for the sensitization. This work demonstrates a general route to impart visible light utilization to a wide band gap semiconductor for various energy conversion and environmental applications, including solar fuel generation and organic pollutant decomposition.

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Visible light photo-oxidation in Au nanoparticle sensitized SrTiO 3:Nb photoanode

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Visible light photo-oxidation in Au nanoparticle sensitized SrTiO ₃:Nb photoanode