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Pt–Cu Bimetallic Alloy Nanoparticles Supported on Anatase TiO2: Highly Active Catalysts for Aerobic Oxidation Driven by Visible Light

Shiraishi, Yasuhiro, Sakamoto, Hirokatsu, Sugano, Yoshitsune, Ichikawa, Satoshi, Hirai, Takayuki·2013·ACS Nano
DOI 10.1021/nn403954p
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Abstract

Visible light irradiation (λ > 450 nm) of Pt-Cu bimetallic alloy nanoparticles (~3-5 nm) supported on anatase TiO2 efficiently promotes aerobic oxidation. This is facilicated via the interband excitation of Pt atoms by visible light followed by the transfer of activated electrons to the anatase conduction band. The positive charges formed on the nanoparticles oxidize substrates, and the conduction band electrons reduce molecular oxygen, promoting photocatalytic cycles. The apparent quantum yield for the reaction on the Pt-Cu alloy catalyst is ~17% under irradiation of 550 nm monochromatic light, which is much higher than that obtained on the monometallic Pt catalyst (~7%). Cu alloying with Pt decreases the work function of nanoparticles and decreases the height of the Schottky barrier created at the nanoparticle/anatase heterojunction. This promotes efficient electron transfer from the photoactivated nanoparticles to anatase, resulting in enhanced photocatalytic activity. The Pt-Cu alloy catalyst is successfully activated by sunlight and enables efficient and selective aerobic oxidation of alcohols at ambient temperature.

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Metadata

Authors
Shiraishi, Y., Sakamoto, H., Sugano, Y., Ichikawa, S., & Hirai, T.
Venue
ACS Nano
Publisher
American Chemical Society (ACS)
Published
2013-09-27
Volume
7
Issue
10
Pages
9287-9297
ISSN
  • 1936-0851 (ISSN-L)
  • 1936-086X
DOI
10.1021/nn403954p
OpenAlex
W2324549582
Cited by
201
References
0
FWCI
7.93
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Pt–Cu Bimetallic Alloy Nanoparticles Supported on Anatase TiO2: Highly Active Catalysts for Aerobic Oxidation Driven by Visible Light. https://app.cochat.ai/papers/10.1021/nn403954p
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Shiraishi, Y., Sakamoto, H., Sugano, Y., Ichikawa, S., & Hirai, T. (2013). Pt–Cu Bimetallic Alloy Nanoparticles Supported on Anatase TiO2: Highly Active Catalysts for Aerobic Oxidation Driven by Visible Light. ACS Nano. https://doi.org/10.1021/nn403954p

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Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.