Gold Nanoparticles Confined in Vertically Aligned Silica Nanochannels and Their Electrocatalytic Activity Toward Ascorbic Acid |
| |
Authors: | Longhua Ding Wanzhen Li Qinqin Sun Yayun He Prof. Bin Su |
| |
Affiliation: | Institute of Microanalytical Systems, Department of Chemistry, Zhejiang University, Hangzhou 310058 (P.R. China), Fax: (+86)?571‐88273572 |
| |
Abstract: | A facile method of confining gold nanoparticles (AuNPs) in silica nanochannels aligned perpendicularly to an underlying electrode surface is reported. The nanochannel surface carrying a layer of (3‐aminopropyl)triethoxy silane (APTS) displays a strong electrostatic interaction with AuCl4?, eventually resulting in the confinement of AuNPs inside the nanochannels after chemical reduction. As‐prepared AuNPs in APTS‐modified mesoporous silica film (APTS‐MSF) are highly dispersed with a narrow size distribution. Furthermore, these AuNPs are free of protecting ligands and exhibit a good electrochemical catalytic activity toward the oxidation of ascorbic acid. |
| |
Keywords: | ascorbic acid electrocatalysis gold nanoparticles mesoporous materials silica nanochannels |
|