Effects of pretreatment of carbon black on PtRu/C catalysts performance

• Main Authors: CHIEN MING FANG, 簡明芳
• Other Authors: HUNG WEI HSIU
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/15316259680418377366

碩士 === 國立臺灣師範大學 === 化學系 === 96 === The chemical treatment of the carbon black support on the performance for methanol electrooxidation was studied. The carbon black was functionalized with KMnO4, KMnO4+HNO3, HNO3 and H2O2. The surface oxygen complexes of the carbon black were determined with FT-IR and XPS. The results showed that the surface oxygen complexes of the carbon black increase after the oxidation treatments. The PtRu catalysts were deposited on the carbon black with two different methods: reduction and adsorption. PtRu catalysts supported on the untreated and treated carbon blacks were characterized with XPS, ICP-AES, XRD, and TEM. The loading of the PtRu by reduction was related to the amount of surface oxygen complexes on the carbon black. The presence of surface oxygen complexes improves the wettability of the carbon black and, hence make the reduction of the precursors easier. The electrocatalytic activities of PtRu on the pretreated carbon black were investigated with the CV and EIS measurements in the oxidation of methanol. The pretreatment of carbon black, especially with H2O2, significantly improves the electrocatalytic performance.