Institute of Electrochemical Process Engineering (IEK-14), Forschungszentrum Jülich, Jülich, Germany.
Central Facility for Electron Microscopy, RWTH Aachen University, Aachen, Germany.
Sci Rep. 2023 Jun 8;13(1):9345. doi: 10.1038/s41598-023-36423-7.
In this study, we present a method for directly coating monoliths with a CeO/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-硝酸盐燃烧法直接在整体式上涂覆 CeO/CuO 催化剂的方法。采用 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 CO 的优先氧化时的实验结果。在富氢气体混合物中存在和不存在水蒸气的情况下，通过记录 CO 转化率作为反应温度的函数，测量了 CO-PrOx 反应的催化活性。在超过 310 小时的长期测试中，证明了催化剂的长期稳定性。与涂覆相比，直接涂覆是一种很有前途的方法，通过该方法可以在单个步骤中将更多的催化剂沉积到整体式上。
