Ethanol steam reforming catalyst’s precursors, i.e., nanocomposites of complex oxides with the general formula [Pr 0.15 Sm 0.15 Ce 0.35 Zr 0.35 O 2 + LaMn 0.45 Ni 0.45 Ru 0.1 O 3 ] (1:1 by mass), were synthesized by three different methods. It was shown that two synthesis methods – ultrasonic dispersion and sequential polymeric method, lead to the formation of the nanocomposite perovskite–fluorite system with the specific surface area up to 50 m 2 /g. Reduction of samples at 400–500°C lead to the formation of Ni–Ru alloy nanoparticles strongly bound with the surface of oxide nanocomposite. Catalytic tests in ethanol steam reforming reaction at 500–600°C showed the highest specific activity of the sample prepared by the sequential polymeric method due to the location of Ni- and Ru-containing perovskite mainly on the surface of the composite providing a high concentration of active metal centers. At higher temperatures for all samples, ethanol conversion approached 100% with hydrogen yield varying in the range of 65–75%. A study of spent catalysts confirmed the absence of carbon deposits after long-term catalytic tests at 650°C.

中文翻译：

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含 Ni-Ru 的混合氧化物基复合材料作为乙醇蒸汽重整催化剂的前体：合成方法对结构和催化性能的影响

乙醇蒸汽重整催化剂的前体，即具有通式 [Pr 0.15 Sm 0.15 Ce 0.35 Zr 0.35 O 2 + LaMn 0.45 Ni 0.45 Ru 0.1 O 3 ]（质量比为 1:1）的复合氧化物的纳米复合材料，由三种不同的方法合成方法。结果表明，两种合成方法——超声波分散法和顺序聚合法，导致形成比表面积高达50 m 2 /g的纳米复合钙钛矿-萤石体系。在 400-500°C 下还原样品导致形成与氧化物纳米复合材料表面牢固结合的 Ni-Ru 合金纳米颗粒。在 500-600°C 的乙醇蒸汽重整反应中的催化试验表明，由于含 Ni 和 Ru 的钙钛矿主要位于复合材料表面，提供了高浓度，因此采用序贯聚合法制备的样品的比活性最高活性金属中心。在所有样品的较高温度下，乙醇转化率接近 100%，氢气产率在 65-75% 的范围内变化。对废催化剂的研究证实，在 650°C 下进行长期催化测试后，没有积碳。