Abstract

The morphological and structural properties of Pd–CeO₂/Al₂O₃ catalytic compositions annealed at 100, 500, and 1000°С are studied, along with thereof coatings deposited on metallic foil via cold gas dynamic spraying. The influence of the preparation technique of the initial catalytic composition and introducing active component into a coating on their phase states, particle sizes, and activitites is elucidated. It is shown that introducing active components via impregnation into preliminarily sprayed alumina layer ensures the uniform distribution of Pd and Ce in the support profile, the formation of nanosized PdO particles, and the phase of interaction between the components of the catalyst and support. The impregnated catalyst shows the highest activity in the reaction of methane oxidation. The technique for preparing coatings has no limitations when scaled up and can find application in manufacturing full-size catalysts on metallic foil for different types of power engineering devices.

中文翻译：

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Pd–CeO 2 / Al 2 O 3组成及其涂层在甲烷氧化中的形态，结构和催化性能

摘要

Pd–CeO ₂ / Al ₂ O ₃的形态和结构性质研究了在100、500和1000°C退火的催化组合物，以及通过冷气体动态喷涂在金属箔上沉积的涂层。阐明了初始催化组合物的制备技术以及将活性组分引入涂层中对其相态，粒径和活性剂的影响。结果表明，通过浸渍将活性组分引入到预先喷涂的氧化铝层中，可确保Pd和Ce在载体轮廓上的均匀分布，纳米级PdO颗粒的形成以及催化剂和载体组分之间相互作用的阶段。浸渍的催化剂在甲烷氧化反应中显示出最高的活性。