By ex situ and in situ techniques we found a direct relation between the Ce³⁺ fraction (related to highly dispersed species) in the support with the lower Cu reincorporation in the Au_1–xCu_x alloy after reduction. The catalyst with the lower CeO₂ loading presented the higher CO₂ production rate, but faster deactivation. The higher Cu reincorporation was related to the higher stability under preferential oxidation of CO (CO-PROX) reaction.

中文翻译：

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氧化铈负载对 CuOx-CeO2 相互作用和 AuCu/CeO2-SiO2 催化剂在 CO-PROX 反应中的影响

通过非原位和原位技术，我们发现载体中的 Ce ³⁺分数（与高度分散的物质有关）与还原后Au _1-x Cu _x合金中较低的 Cu 再结合率之间存在直接关系。CeO ₂负载量较低的催化剂表现出较高的CO ₂产率，但失活较快。较高的铜再掺入与 CO 优先氧化 (CO-PROX) 反应下的较高稳定性有关。