Synthesis of Pt/Graphene Nanocomposites and Its Application to Direct Methanol Fuel Cells

• Main Authors: Shang-Hua Tsai, 蔡尚樺
• Other Authors: Wen-Jauh Chen
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/32543770750074100992

碩士 === 國立雲林科技大學 === 材料科技研究所 === 101 === The graphene oxide was prepared from natural graphite by a modified Hummer’s method. A two-step was developed to prepare graphene supported Pt NPs (Pt/G) and Pt-Ag NPs (PtAg/G). As-prepared Pt/G and PtAg/G catalysts was characterized by cyclic voltammetry, chronoamperometry, X-ray diffraction and energy dispersive spectrometers. For comparison, the properties of commercial catalysts Vulcan-XC-72 also evaluated by cyclic voltammetry. The Pt/G catalysts shows better electrocatalyst properties and tolerance than the commercial catalysts XC-72. Due to graphene possess higher specific surface area than carbon black.The tolerance was increased by add Ag NPs to the Pt/G catalysts.