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首页> 外文期刊>Journal of Materials Science >Synthesis, characterization and catalytic activity of Au supported on functionalized SBA-15 for low temperature CO oxidation
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Synthesis, characterization and catalytic activity of Au supported on functionalized SBA-15 for low temperature CO oxidation

机译：SBA-15负载的Au的合成，表征及催化低温CO氧化性能。

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摘要

SBA-15 functionalization with 3-mercaptopropyltrimethoxysilane was used to prepare a supported gold catalyst for the low temperature CO oxidation reaction. Catalytic runs were performed at atmospheric pressure and T = 40-150 A degrees C and the influence of different thermal treatments of the sample prior to reaction was studied. The modifications induced by the pre-treatments in the physico-chemical properties of both the carrier and the disperse phase were investigated by chemical analysis, CHS elemental analysis, N-2 adsorption-desorption, X-ray diffraction (XRD), transmission electron microscopy (TEM), solid state cross-polarization magic-angle-spinning nuclear magnetic resonance spectroscopy (CPMAS NMR) of Si-29 and C-13 and Fourier transform infrared spectroscopy (FTIR). The pre-treatment conditions were found to strongly affect both the gold particle size and the nature of the Au surface species. An appreciable catalytic activity was found on samples treated at 600 A degrees C in H-2/He atmosphere, provided that the functionalizing agent had been completely removed by a previous high-temperature calcination.
机译：使用3-巯基丙基三甲氧基硅烷进行的SBA-15官能化反应制备了用于低温CO氧化反应的负载型金催化剂。催化运行在大气压和T = 40-150 A摄氏度下进行，并研究了反应之前样品的不同热处理的影响。通过化学分析，CHS元素分析，N-2吸附-解吸，X射线衍射（XRD），透射电子显微镜研究了预处理对载体和分散相的理化性质的影响。 （TEM），Si-29和C-13的固态交叉极化魔角自旋核磁共振光谱（CPMAS NMR）和傅立叶变换红外光谱（FTIR）。发现预处理条件强烈影响金的粒径和金表面物种的性质。如果在以前的高温煅烧条件下已完全除去功能化剂，则在H 2 / He气氛中在600 A的温度下处理的样品上会发现明显的催化活性。

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