title: Efficient photocatalytic hydrogen production by platinum-loaded carbon-doped cadmium indate nanoparticles.
abstract: Undoped and carbon doped cadmium indate (CdIn(2)O(4)) powders were synthesized using a sol-gel pyrolysis method and evaluated for hydrogen generation activity under UV-visible irradiation without the use of a sacrificial reagent. Each catalyst powder was loaded with a platinum cocatalyst in order to increase electron-hole pair separation and promote surface reactions. Carbon-doped indium oxide and cadmium oxide were also prepared and analyzed for comparison. UV-vis diffuse reflectance spectra indicate the band gap for C-CdIn(2)O(4) to be 2.3 eV. C-doped In(2)O(4) showed a hydrogen generation rate approximately double that of the undoped material. When compared to platinized TiO(2) in methanol, which was used as a control material, C-CdIn(2)O(4) showed a 4-fold increase in hydrogen production. The quantum efficiency of the material was calculated at different wavelength intervals and found to be 8.7% at 420-440 nm. The material was capable of hydrogen generation using visible light only and with good efficiency even at 510 nm.
authors.affiliation: Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, USA.
authors.forename: Jason M
authors.initials: JM
authors.lastname: Thornton
authors.forename: Daniel
authors.initials: D
authors.lastname: Raftery
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry; D002244:Carbon / Q000737:chemistry*; D002384:Catalysis; D006859:Hydrogen / Q000737:chemistry*; D007204:Indium / Q000737:chemistry; D008027:Light; D053768:Metal Nanoparticles / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry; D010984:Platinum / Q000737:chemistry*; D014466:Ultraviolet Rays
chemical_list: D019187:Cadmium Compounds; D010087:Oxides; D007204:Indium; C029663:cadmium oxide; D010984:Platinum; C047711:indium oxide; D002244:Carbon; D006859:Hydrogen