The structure of a support material can have profound impacts on the behavior of a catalyst, altering the activity and selectivity of chemical reactions. In this article, we investigate the influence of the support material's structure on the activity of Au/CeO₂ catalysts for selective oxidation of ethanol in a fixed-bed flow reactor. By doping the ceria support with Al, La, and Zr during synthesis and by altering the temperature of pretreatment in air after synthesis, ceria particles varying in size between 3 nm and 22 nm were prepared. The smaller ceria particles exhibited higher oxygen storage capacities as determined by temperature programmed reduction testing and resulted in more active catalysts for ethanol oxidation. We note a linear correlation between oxygen storage capacity and catalytic activity for ethanol oxidation.

中文翻译：

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二氧化铈负载的金催化剂的二氧化铈粒度，还原性和乙醇氧化活性之间的相互作用†

载体材料的结构可能会对催化剂的行为产生深远影响，从而改变化学反应的活性和选择性。在本文中，我们研究了载体材料的结构对Au / CeO ₂活性的影响固定床流动反应器中用于乙醇选择性氧化的催化剂。通过在合成过程中用Al，La和Zr掺杂二氧化铈载体，并在合成后通过改变空气中的预处理温度，制备了尺寸在3 nm至22 nm之间的二氧化铈颗粒。通过程序升温还原测试确定，较小的二氧化铈颗粒表现出较高的储氧能力，并导致用于乙醇氧化的活性更高的催化剂。我们注意到储氧量与乙醇氧化催化活性之间存在线性关系。