​每周分享：Activation of carbon-supported platinum catalysts by sodium for the low-temperature water-gas shift reaction

    今天给大家分享的是2014年1月份 《Applied Catalysis B: Environmental》上发表的一篇名为：Activation of carbon-supported platinum catalysts by sodium for the low-temperature water-gas shift reaction
 
文章摘要如下：
The activation of multi-walled carbon nanotube-supported platinum catalysts for the low-temperature water-gas shift reaction is demonstrated by the addition of sodium. Nitric acid oxidation of the carbon nanotubes allows for the addition of sodium through ion-exchange and creates anchoring sites for platinum. We show that an oxidized platinum state is stabilized by the presence of sodium. Evidence for a sodium-promoted Pt-(OH)x active site is given through XPS analysis of the catalysts before and after reaction and confirmed by CO-TPR. Removal of the oxygen groups and partial removal of sodium by annealing the Na-modified carbon nanotubes to 800 °C in inert atmosphere creates a surface on which Pt is initially very active, but of lower stability due to the absence of a sufficient number of surface sodium anchoring sites.
 
该文章中材料表征采用的是美国麦克仪器AutoChem 2920
 
详情可参考下面链接：
http://www.sciencedirect.com/science/article/pii/S0926337313004323