Secondary ion mass spectrometry and X-ray photoelectron spectroscopy of Na2MoO4/SiO2 catalysts for methane oxidative coupling
Secondary ion mass spectrometry and X-ray photoelectron spectroscopy of Na2MoO4/SiO2 catalysts for methane oxidative coupling
复制标题
DOI：
10.1039/ft9959100381
复制
发表时间：
1995
期刊：
影响因子：
--
通讯作者：
Yong S. Jin;Q. Yan;Z. Yin;Yi Chen
中科院分区：
文献类型：
--
作者：
Yong S. Jin;Q. Yan;Z. Yin;Yi Chen
采用二次离子质谱（SIMS）、x射线光电子能谱（XPS）、红外光谱（FTIR）和x射线衍射（XRD）对不同Na2MoO4负载的Na2MoO4/SiO2催化剂进行了表征。测试了它们对甲烷氧化偶联（MOC）的催化活性。结果表明，Na2MoO4与SiO2之间存在一定的相互作用，导致Na2MoO4在载体表面高度分散。覆盖在催化剂表面的高度分散的物质有利于形成低配位的表面位点。讨论了低配位表面位点数量与催化性能的关系。
A series of Na2MoO4/SiO2 catalysts with various loadings of Na2MoO4 have been characterized using secondary ion mass spectrometry (SIMS), X-ray photoelectron spectroscopy (XPS), FTIR and X-ray diffraction (XRD). Their catalytic activity for methane oxidative coupling (MOC) has been tested. The results revealed some type of interaction between Na2MoO4 and SiO2, which leads to a high dispersion of NaMoO4 at the support surface. The highly dispersed species covering the catalyst surface favour the formation of surface sites of low coordination. The relationship between catalytic performance and the amount of surface sites of low coordination was discussed.