A new bimetallic plasmonic photocatalyst consisting of gold(core)-copper(shell) nanoparticle and titanium(IV) oxide support | Zendy

Yuichi Sato | Zendy; Shinichi Naya | Zendy; Hiroaki Tada | Zendy

Open Access

A new bimetallic plasmonic photocatalyst consisting of gold(core)-copper(shell) nanoparticle and titanium(IV) oxide support

Author(s) -

Yuichi Sato,

Shinichi Naya,

Hiroaki Tada

Publication year - 2015

Publication title -

apl materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.571

H-Index - 60

ISSN - 2166-532X

DOI - 10.1063/1.4923098

Subject(s) - materials science , bimetallic strip , underpotential deposition , surface plasmon resonance , copper , nanoparticle , titanium , photocatalysis , cyclic voltammetry , plasmon , rutile , photoelectrochemistry , oxide , precipitation , inorganic chemistry , titanium oxide , photochemistry , chemical engineering , nanotechnology , electrochemistry , metallurgy , catalysis , electrode , chemistry , metal , optoelectronics , biochemistry , physics , engineering , meteorology

Ultrathin Cu layers (∼2 atomic layers) have been selectively formed on the Au surfaces of Au nanoparticle-loaded rutile TiO2 (Au@Cu/TiO2) by a deposition precipitation-photodeposition technique. Cyclic voltammetry and photochronopotentiometry measurements indicate that the reaction proceeds via the underpotential deposition. The ultrathin Cu shell drastically increases the activity of Au/TiO2 for the selective oxidation of amines to the corresponding aldehydes under visible-light irradiation (λ > 430 nm). Photochronoamperometry measurements strongly suggest that the striking Cu shell effect stems from the enhancement of the charge separation in the localized surface plasmon resonance-excited Au/TiO2

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