科研之友
微信
新浪微博
Facebook
分享链接
摘要
The use of fullerene [60] (C-60) as carbon support material assists the dispersion of catalysts and provides new ways to develop advanced electrocatalyst materials as a result of its distorted structure. However, C-60 cannot be readily dispersed in water because of its hydrophobic properties. In this paper hydroxypropyl-beta-Cyclodextrin (HP-beta-CD) modified C-60 (abbreviated as HP-beta-CD-C-60) is introduced and palladium nanoclusters, composed of nanoparticles supported on HP-beta-CD-C-60 (Pd/HP-beta-CD-C-60) are successfully prepared. The results of transmission electron microscopy measurements show that the novel as-prepared nanoclusters Pd catalyst, dispersed on HP-beta-CD modified C-60, is composed of Pd nanoparticles, in which the average size of the Pd nanoparticles is 2.5 nm. Cyclic voltammograms for the oxidation of pre-adsorbed CO demonstrate that the Pd/HP-beta-CD-C-60 nanocomposites, with an electrochemical surface area of 41.6 m(2) g(-1), show excellent electrocatalytic activity. From the cyclic voltammetry and chronoamperometry results for formic acid oxidation, the Pd/HP-beta-CD-C-60 modified electrode reveals a significantly high electrocatalytic activity, much more negative onset potentials and better stability than electrodes modified by other electrocatalysts, which indicates that it is a better potential candidate for application in a direct formic acid fuel cell (DFAFC).
