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Preparation and characterization of mesostructured cellular foam silica supported Cu–Ce mixed oxide catalysts for CO oxidation

机译：介孔泡沫二氧化硅支撑的Cu-Ce混合氧化物催化剂的制备与表征

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In this paper, a series of mesostructured cellular foam (MCF) silica supported CuO–CeO2 catalysts (CuO–CeO2/MCF) with various total metal loadings (10–40 wt%) and various Cu/Ce ratios (Cu/Ce = 1/9, 2/8, and 3/7 wt/wt) were prepared by using a co-impregnation method. Their physicochemical properties and catalytic activity were investigated by various techniques including XRD, TEM, N2 adsorption–desorption, Raman, XPS, H2-TPR, CO-TPD, and a low-temperature CO oxidation reaction test. The results show that the catalyst with a bimetallic loading of 30 wt% and Cu/Ce ratio of 2?:?8 (wt/wt) has the highest catalytic activity, which can be attributed to the largest amount of finely dispersed Cu species strongly interacting with CeO2, the highest concentrations of oxygen vacancies and active lattice oxygen, and the largest amount of Cu+ (the better CO adsorption sites).
机译：本文研究了一系列介孔泡沫硅（MCF）二氧化硅负载的CuO–CeO 2 催化剂（CuO–CeO 2 < / small> / MCF）通过使用以下方法制备，其具有各种金属总量（10–40 wt％）和各种Cu / Ce比（Cu / Ce = 1 / 9、2 / 8和3/7 wt / wt）。共浸法。通过XRD，TEM，N 2 吸附-解吸，拉曼，XPS，H 2 的各种技术研究了它们的理化性质和催化活性。 sub> -TPR，CO-TPD和低温CO氧化反应测试。结果表明，双金属负载量为30 wt％，Cu / Ce比为2α：？8（wt / wt）的催化剂具有最高的催化活性，这归因于大量细分散的Cu物种的强烈存在。与CeO 2 相互作用，氧空位和活性晶格氧的浓度最高，Cu + （更好的CO吸附位）。

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