In this study, we present a method for directly coating monoliths with a CeO₂/CuO catalyst using the urea-nitrate combustion method. The catalyst was characterized by means of XRD, SEM/EDX, and EPR measurements. Experimental results are described, when this catalyst was used for the preferential oxidation of CO. The catalytic activity for the CO–PrOx-reaction was measured by recording CO conversion as a function of the reaction temperature in a hydrogen-rich gas mixture in the presence and absence of water vapor. In a long-term test of over 310 h, the catalyst’s long-term stability was demonstrated. Direct coating is shown to be a promising approach by which a larger amount of catalyst can be deposited onto the monolith in a single step than would be possible with washcoats.

在这项研究中，我们提出了一种使用尿素-硝酸盐燃烧法用CeO ₂ /CuO 催化剂直接涂覆整料的方法。通过 XRD、SEM/EDX 和 EPR 测量对催化剂进行了表征。描述了当该催化剂用于优先氧化 CO 时的实验结果。CO-PrOx 反应的催化活性是通过记录 CO 转化率作为富氢气体混合物中反应温度的函数来测量的并且没有水蒸气。在超过310 h的长期测试中，证明了催化剂的长期稳定性。直接涂层被证明是一种很有前途的方法，通过它可以在一个步骤中将更大量的催化剂沉积到整料上，而不是涂层。