title: Direct deposition of trivalent rhodium hydroxide nanoparticles onto a semiconducting layered calcium niobate for photocatalytic hydrogen evolution.
abstract: Well-dispersed Rh(OH)3 nanoparticles were deposited in the interlayer galleries of a Dion-Jacobson type layered perovskite (ACa2Nb3O10: A=H or K). X-ray photoelectron spectra and zeta potential measurements suggest covalent bonding (Rh-O-Nb) between the nanoparticles and the niobate sheets. After calcination of Rh(OH)3/KCa2Nb3O10 at 350 degrees C in air, interlayer Rh(OH)3 nanoparticles were transformed to Rh2O3 and showed higher photocatalytic activity for hydrogen evolution using methanol as a sacrificial electron donor.
authors.affiliation: Department of Chemistry and Materials Research Institute, The Pennsylvania State University, University Park 16802, USA.
authors.forename: Hideo
authors.initials: H
authors.lastname: Hata
authors.forename: Yoji
authors.initials: Y
authors.lastname: Kobayashi
authors.forename: Vince
authors.initials: V
authors.lastname: Bojan
authors.forename: W Justin
authors.initials: WJ
authors.lastname: Youngblood
authors.forename: Thomas E
authors.initials: TE
authors.lastname: Mallouk
mesh_terms: D002118:Calcium / Q000737:chemistry*; D002384:Catalysis; D006859:Hydrogen / Q000737:chemistry*; D006878:Hydroxides / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D046529:Microscopy, Electron, Transmission; D009556:Niobium / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D010777:Photochemistry; D012238:Rhodium / Q000737:chemistry*; D012666:Semiconductors; D014961:X-Ray Diffraction
chemical_list: D006878:Hydroxides; D010087:Oxides; D009556:Niobium; D006859:Hydrogen; D012238:Rhodium; D002118:Calcium