Ceria nanostructures (particles, rods and cubes) were used as support of 10 wt. % Ni/CeO₂ catalysts and tested in the steam reforming of ethanol (SRE) reaction at stoichiometric conditions. Supports were prepared by precipitation and hydrothermal methods. Nickel was incorporated by incipient wetness impregnation. Catalysts were characterized by N₂ adsorption, EDS, X-ray diffraction, transmission electron microscopy, Raman spectroscopy, N₂O chemisorption, temperature programed reduction and CO-oxidation. Characterization of materials showed differences in the nickel particle size, nickel dispersion and its interaction with the ceria support, all these features dependent on the morphology of ceria; trends observed in calcined samples are retrieved in the reduced catalysts. Nickel supported on ceria rods (Ni/Ce-r) exhibited the best activity and hydrogen yield in the SRE reaction at 550 °C for 24 h under stream. Moreover, temperature-programmed oxidation of spent catalysts showed that the Ni/Ce-r sample presented the lower amount of carbon deposits which were also removed at lower temperatures. These characteristics of the rod-shaped catalyst were ascribed to the enhanced oxygen storage capacity presented by ceria rods and the higher dispersion of nickel over this ceria nanostructure.

二氧化铈纳米结构（颗粒，棒和立方体）用作10 wt。％的载体。％的Ni / CeO ₂催化剂，并在化学计量条件下在乙醇的蒸汽重整（SRE）反应中进行了测试。通过沉淀和水热法制备载体。通过初期湿润浸渍来掺入镍。通过N ₂吸附，EDS，X射线衍射，透射电子显微镜，拉曼光谱，N ₂表征催化剂化学吸附，程序升温还原和CO氧化。材料的表征显示镍粒度，镍分散度及其与二氧化铈载体相互作用的差异，所有这些特征均取决于二氧化铈的形态。在还原的催化剂中可以找到煅烧样品中观察到的趋势。负载在二氧化铈棒上的镍（Ni / Ce-r）在550°C的SRE反应中于流下24h表现出最佳的活性和氢产率。此外，废催化剂的温度程序化氧化表明，Ni / Ce-r样品呈现出较少的碳沉积物，这些碳沉积物也在较低的温度下被清除。棒状催化剂的这些特征归因于二氧化铈棒呈现的增强的储氧能力和镍在该二氧化铈纳米结构上的较高分散性。