ESR study of reduced vanadium-titanium oxide catalysts

被引:6
|
作者
Altynnikov, AA [1 ]
Zenkovets, GA [1 ]
Anufrienko, VF [1 ]
机构
[1] Boreskov Inst Catalysis, Novosibirsk 630090, Russia
来源
关键词
vanadium-titanium oxide catalyst; reduction with hydrogen; ESR;
D O I
10.1007/BF02475771
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Reduction of vanadium-titanium oxide catalysts with hydrogen in the temperature range of 150-450 degrees C results in the increase of the content of V4+ ions in substitution positions of TiO2 with the anatase structure. The temperature increase up to 250 degrees C results in the growth of the spectral intensity of V4+ associates in substitution positions of anatase. At higher treatment temperatures their intensity decreases due to the formation of VO2 fragments in anatase. At 400 degrees C and higher temperatures a solid solution of V4+ ions in rutile is formed.
引用
收藏
页码:273 / 279
页数:7
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