Organically doped metals - A new approach to metal catalysis: Enhanced Ag-catalyzed oxidation of methanol

作者：Shter Gennady E; Behar Levy Hanna; Gelman Vladimir; Grader Gideon S^*; Avnir David

来源：Advanced Functional Materials, 2007, 17(6): 913-918.

DOI：10.1002/adfm.200600482

We report here a new approach for the modification of the performance of metal catalysts: organic doping of the metal. Specifically, we report that the doping of Ag with Congo Red (CR@Ag) significantly improves the performance of Ag as a catalyst for methanol oxidation to formaldehyde, outperforming both pure Ag and CR-coated Ag (CR/Ag) in terms of lowering the temperature needed for maximal conversion by 100 degrees C, lowering the temperature by 200 degrees C to reach the maximal selectivity (aldehyde formation), and increasing the maximal space velocity by a factor of two. We were led to this discovery by a detailed investigation of the thermal behavior (thermogravimetric and differential thermal analysis and mass spectroscopy) of CR@Ag under an oxidative atmosphere, which has indicated that the metal is strongly catalyzing the CR oxidation, and which pointed to the relevant temperature for activation of the catalyst.

• 出版日期2007-4-16