| 초록 |
Activated carbon was synthesized from rice husks via chemical activation using potassium hydroxide (KOH). Pt-Ru metals were deposited on the activated rice husks (A-RHs) by means of a chemical reduction method. The structural, surface, and textural characteristics of the carbon supports and Pt-Ru/A-RH catalysts were analyzed by X-ray diffraction (XRD), transmission electron microscopy (TEM), and surface area analysis, respectively. The electrochemical activity was characterized by cyclic voltammetry (CV). The results demonstrated that the specific surface area of the carbon supports increased as the KOH ratio for chemical activation increased to 1:3. Concurrently, the mean Pt-Ru nanoparticle size decreased due to the improved dispersibility of Pt-Ru in the Pt-Ru/A-RH catalysts. The Pt-Ru/A-RH (1:3) catalyst exhibited uniform dispersion of Pt-Ru on the activated carbons, which enhanced the electrocatalytic activity of the Pt-Ru catalysts. |
