Structure and catalytic activity of alumina supported platinum-cobalt bimetallic catalysts. 3. Effect of treatment on the interface layer
Structure and catalytic activity of alumina supported platinum-cobalt bimetallic catalysts. 3. Effect of treatment on the interface layer
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DOI：
10.1021/j100202a061
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发表时间：
1992-11
期刊：
影响因子：
--
通讯作者：
Z. Zsoldos;L. Guczi
中科院分区：
文献类型：
--
作者：
Z. Zsoldos;L. Guczi
用X射线光电子能谱(XPS)研究了一系列Pt1-xCox/Al2 O3双金属样品在770K氧气中焙烧，然后在770K氢气中原位还原后，金属与氧化铝界面的结构。在所有焙烧样品中，铂以铂(4+)的价态存在。随后在770K的氢气中处理只导致离子铂部分还原到零价态
The structure of the interface between metal and alumina in a series of Pt 1-x Co x /Al 2 O 3 bimetallic samples has been investigated by X-ray photoelectron spectroscopy (XPS) after calcination in oxygen at 770 K with subsequent in situ reduction in hydrogen in H 2 at 770 K. On all calcined samples platinum was found int he Pt(4+) valence state as an oxide species. Subsequent treatment in H 2 at 770 K resulted only in a partial reduction of ionic platinium into the zerovalent state