Bifunctional nanocatalyst of bimetallic nanoparticle/TiO2 with enhanced performance in electrochemical and photoelectrochemical applications.
A novel metal/semiconductor hybrid nanostructure with enhanced catalytic functions has been prepared by a simple self-assembly approach. This new bifunctional nanocatalyst consists of evenly dispersed Au/Pt hybrid nanoparticles (Au/Pt NPs) assembled on NH(2) group functionalized anatase TiO(2) colloid spheres with nanoporous surface (f-TiO(2)). The resulting bimetallic nanoparticles/TiO(2) (noted as f-TiO(2)-Au/Pt NPs) hybrid nanostructure is characterized by various methods and expected as a promising catalyst in electrochemical and photoelectrochemical applications because of its satisfactory or even enhanced catalytic properties from both TiO(2) and Au/Pt NPs. Compared with the f-TiO(2), the electrochemical results indicate that the as-prepared f-TiO(2)-Au/Pt NPs exhibited more prominent electrocatalytic reduction toward hydrogen peroxide at low potential, which was then used as a sensitive sensor with a detection limit of 75 nM. Most importantly, the present hybrid material has the better photocatalytic property, as demonstrated by the photoelectrochemical catalysis of glucose.
Wen
Dan
D
State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, PR China.
Guo
Shaojun
S
Wang
Yizhe
Y
Dong
Shaojun
S
D002384:Catalysis; D055664:Electrochemical Techniques; D004563:Electrochemistry; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D010777:Photochemistry; D056951:Photoelectron Spectroscopy; D014025:Titanium / Q000737:chemistry*
C009495:titanium dioxide; D014025:Titanium