Accession Number : ADA549813


Title :   Preparation and Electrocatalytic Activity of Gold Nanoparticles Immobilized on the Surface of 4-Mercaptobenzoyl-Functionalized Multiwalled Carbon Nanotubes


Descriptive Note : Journal article


Corporate Author : ULSAN NATIONAL INSTITUTE OF SCIENCE AND TECHNOLOGY (KOREA SOUTH)


Personal Author(s) : Choi, Hyun-Jung ; Jeon, In-Yup ; Chang, Dong W ; Yu, Dingshan ; Dai, Liming ; Tan, Loon-Seng ; Baek, Jong-Beom


Full Text : http://www.dtic.mil/dtic/tr/fulltext/u2/a549813.pdf


Report Date : 20 Dec 2010


Pagination or Media Count : 8


Abstract : Multiwalled carbon nanotubes (MWCNTs) were functionalized with 4-mercaptobenzoic acid in a polyphosphoric acid/phosphorous pentoxide medium to produce 4-mercaptobenzoyl-functionalized MWCNTs (MB-MWCNTs). Gold nanoparticles (GNPs), stabilized by trisodium citrate, were prepared from the in-situ reduction of gold(III) chloride trihydrate by sodium borohydride in the presence of MB-MWCNTs dispersed in ethanol. The morphology of the resulting GNP/MB-MWCNT hybrid showed that GNPs were formed with an average diameter of 4.3 nm, and these were uniformly deposited on the surface of the MB-MWCNTs. High resolution transmission electron microscopy and X-ray photoelectron spectroscopy studies revealed that the GNPs had a well-defined crystal structure. Cyclic voltammetry results showed a high electrocatalytic activity and electrochemical stability of the GNP/MB-MWCNT hybrid in both acidic and basic media.


Descriptors :   *CARBON NANOTUBES , *CHEMICAL REACTIONS , *ELECTROCATALYSTS , CATALYSIS , CRYSTAL STRUCTURE , FUEL CELLS , GOLD , NANOPARTICLES , REPRINTS


Subject Categories : Physical Chemistry
      Refractory Fibers


Distribution Statement : APPROVED FOR PUBLIC RELEASE