日韩av大片在线观看欧美成人不卡|午夜先锋看片|中国女人18毛片水多|免费xx高潮喷水|国产大片美女av|丰满老熟妇好大bbbbbbbbbbb|人妻上司四区|japanese人妻少妇乱中文|少妇做爰喷水高潮受不了|美女人妻被颜射的视频,亚洲国产精品久久艾草一,俄罗斯6一一11萝裸体自慰,午夜三级理论在线观看无码

   今天給大家分享的是2014年1月份 《Applied Catalysis B: Environmental》上發(fā)表的一篇名為：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.

該文章中材料表征采用的是美國(guó)麥克儀器AutoChem 2920

詳情可參考下面鏈接：

http://www.sciencedirect.com/science/article/pii/S0926337313004323