title: Photocatalytic Hydrogen Generation by CdSe/CdS Nanoparticles.
abstract: The photocatalytic hydrogen (H2) production activity of various CdSe semiconductor nanoparticles was compared including CdSe and CdSe/CdS quantum dots (QDs), CdSe quantum rods (QRs), and CdSe/CdS dot-in-rods (DIRs). With equivalent photons absorbed, the H2 generation activity orders as CdSe QDs ≫ CdSe QRs > CdSe/CdS QDs > CdSe/CdS DIRs, which is surprisingly the opposite of the electron-hole separation efficiency. Calculations of photoexcited surface charge densities are positively correlated with the H2 production rate and suggest the size of the nanoparticle plays a critical role in determining the relative efficiency of H2 production.
authors.affiliation: Departments of Chemistry and ‡The Institute of Optics, University of Rochester , Rochester, New York 14627, United States.
authors.forename: Fen
authors.initials: F
authors.lastname: Qiu
authors.affiliation: Departments of Chemistry and ‡The Institute of Optics, University of Rochester , Rochester, New York 14627, United States.
authors.forename: Zhiji
authors.initials: Z
authors.lastname: Han
authors.affiliation: Departments of Chemistry and ‡The Institute of Optics, University of Rochester , Rochester, New York 14627, United States.
authors.forename: Jeffrey J
authors.initials: JJ
authors.lastname: Peterson
authors.affiliation: Departments of Chemistry and ‡The Institute of Optics, University of Rochester , Rochester, New York 14627, United States.
authors.forename: Michael Y
authors.initials: MY
authors.lastname: Odoi
authors.affiliation: Departments of Chemistry and ‡The Institute of Optics, University of Rochester , Rochester, New York 14627, United States.
authors.forename: Kelly L
authors.initials: KL
authors.lastname: Sowers
authors.affiliation: Departments of Chemistry and ‡The Institute of Optics, University of Rochester , Rochester, New York 14627, United States.
authors.forename: Todd D
authors.initials: TD
authors.lastname: Krauss
keywords: Nanoparticles; hydrogen generation; photocatalysis; water splitting