CeO with different morphology of rod-shape (R-CeO), cube-shape (C-CeO) and octahedra-shape (O-CeO) were synthesized as supports and impregnated with Ru to obtain Ru/CeO catalysts, and the performance of which in catalytic oxidation of different chlorine-containing volatile organic compounds (CVOCs) (1,2-dichloroethylene (DCE) and vinyl chloride (VC)) were investigated. Due to the stronger interaction between Ru and R-CeO, Ru was highly dispersed on R-CeO and more Ru entered support lattice to form Ru-O-Ce structure, thus Ru/R-CeO catalyst exhibited better redox property. Ru addition enhanced the acidity of Ru/R-CeO and Ru/C-CeO, while that of Ru/O-CeO decreased instead. The acidity mainly affected DCE catalytic activity when catalyst had sufficient redox property and chlorine resistance. Ru content was the main factor affecting VC catalytic activity. Ru/R-CeO catalyst exhibited the best catalytic activity in both DCE and VC catalytic oxidation with T of 285 °C and 207 °C, respectively, due to its excellent redox property, acidity, and sufficient Ru. In situ DRIFTS suggested that DCE was first dissociated to VC and then oxidized to carboxylates, and the addition of Ru led to the oxidation of carboxylates to carbonyl and ultimately to complete oxidation to CO and HO. Ru was important for the oxidation of carboxylate intermediates.

中文翻译：

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二氧化铈形貌对Ru/CeO2催化剂氧化不同CVOCs催化性能的影响

合成了棒状（R-CeO）、立方体（C-CeO）和八面体（O-CeO）不同形貌的CeO为载体，并用Ru浸渍得到Ru/CeO催化剂，并对其性能进行了研究。研究了不同含氯挥发性有机化合物（CVOC）（1,2-二氯乙烯（DCE）和氯乙烯（VC））的催化氧化作用。由于Ru与R-CeO之间较强的相互作用，Ru高度分散在R-CeO上，更多的Ru进入载体晶格形成Ru-O-Ce结构，因此Ru/R-CeO催化剂表现出更好的氧化还原性能。 Ru的添加增强了Ru/R-CeO和Ru/C-CeO的酸性，而Ru/O-CeO的酸性反而降低。当催化剂具有足够的氧化还原性和耐氯性时，酸性主要影响DCE的催化活性。 Ru含量是影响VC催化活性的主要因素。 Ru/R-CeO催化剂由于其优异的氧化还原性能、酸性和充足的Ru，在DCE和VC催化氧化中表现出最好的催化活性，T分别为285℃和207℃。原位DRIFTS表明DCE首先解离为VC，然后氧化为羧酸盐，Ru的添加导致羧酸盐氧化为羰基，最终完全氧化为CO和H2O。 Ru 对于羧酸中间体的氧化很重要。