title: Controllable deposition of platinum nanoparticles on single-wall carbon nanohorns as catalyst for direct methanol fuel cells.
abstract: Uniform and well dispersed platinum nanoparticles were successfully deposited on single-walled carbon nanohorns with the assistance of 4,4-dipydine and ion liquids, respectively. In particular, the size of platinum nanoparticles could be controlled in a very narrow range (2.2 to 2.5 nm) when ion liquids were applied. The crystalline nature of these platinum nanoparticles was confirmed by high resolution transmission electron microscopy observation and X-ray power diffraction analysis, and two species of platinum Pt(0) and Pt(II) were detected by X-ray photoelectron spectroscopy. Electrochemical studies revealed that thus obtained nanocomposites had much better electrocatalytic activity for the methanol oxidation than those prepared with carbon nanotubes as supporter.
authors.affiliation: Key Laboratory of Functional Inorganic Material Chemistry, Heilongjiang University, Ministry of Education of the People's Republic of China, Harbin 150080, PR China.
authors.forename: Ben
authors.initials: B
authors.lastname: Niu
authors.forename: Wei
authors.initials: W
authors.lastname: Xu
authors.forename: Zhengduo
authors.initials: Z
authors.lastname: Guo
authors.forename: Nengzhi
authors.initials: N
authors.lastname: Zhou
authors.forename: Yang
authors.initials: Y
authors.lastname: Liu
authors.forename: Zujin
authors.initials: Z
authors.lastname: Shi
authors.forename: Yongfu
authors.initials: Y
authors.lastname: Lian