Preparation and Electrocatalytic Activity of Gold Nanoparticles Immobilized on the Surface of 4-Mercaptobenzoyl-Functionalized Multiwalled Carbon Nanotubes
ULSAN NATIONAL INSTITUTE OF SCIENCE AND TECHNOLOGY (KOREA SOUTH)
Pagination or Media Count:
Multiwalled carbon nanotubes MWCNTs were functionalized with 4-mercaptobenzoic acid in a polyphosphoric acidphosphorous 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 goldIII chloride trihydrate by sodium borohydride in the presence of MB-MWCNTs dispersed in ethanol. The morphology of the resulting GNPMB-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 GNPMB-MWCNT hybrid in both acidic and basic media.
- Physical Chemistry
- Refractory Fibers