In-situ X-ray photoelectron spectroscopy study of supported gallium oxide
In-situ X-ray photoelectron spectroscopy study of supported gallium oxide
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DOI：
10.1016/j.susc.2010.03.005
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发表时间：
2010-06-15
期刊：
影响因子：
1.9
通讯作者：
Amiridis, Michael D.
中科院分区：
文献类型：
--
作者：
Serykh, Alexander I.;Amiridis, Michael D.
对通过浸渍不同金属氧化物载体（SiO(2)、γ-Al(2)O(3)、TiO(2) 和 MgO）制备的负载型氧化镓催化剂进行了原位 XPS 研究。已经发现，催化剂在流动氢气中高温还原时会形成金属镓。在氧化铝和二氧化钛负载的催化剂的情况下，金属镓的相对浓度最高。有人提出，氧化镓与载体表面的相互作用有利于高温还原时金属镓的形成。讨论了还原时形成金属镓的可能机制。 (C) 2010 Elsevier B.V. 保留所有权利。
In-situ XPS study of supported gallium oxide catalysts prepared by impregnation of different metal oxides supports (SiO(2), gamma-Al(2)O(3),TiO(2), and MgO) has been performed. It has been found that the formation of metallic gallium takes place upon high-temperature reduction of the catalysts in flowing hydrogen. Relative concentrations of metallic gallium were most high in the cases of alumina- and titania-supported catalysts. It was suggested that interaction of gallium oxide with a support surface favors the formation of metallic gallium upon high-temperature reduction. A possible mechanism of metallic gallium formation upon the reduction is discussed. (C) 2010 Elsevier B.V. All rights reserved.