TPD-DRIFTS experiments upon methanol adsorption over copper (5 wt%) supported on well-shaped ceria (polyhedra, rods and cubes) have been performed for the first time. Support morphology influences the type of methoxy and formate adsorbed species; in polyhedron and rod-shaped catalysts, linear methoxy and formate are the predominant species, while in cube-shaped catalyst, bridged species dominate. In the catalysts, desorption of H₂ and CO₂ increases significantly indicating that besides dehydrogenation of adsorbed methoxy, oxidation of adsorbed formate species is taking place. Heterogeneity of surface sites (copper, ceria and copper/ceria interface), surface defects and acid–base properties may account for the differences in the desorption profiles and reactivities of the adsorbed species over the three copper–ceria catalysts.

中文翻译：

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TPD-DRIFTS研究在形状良好的CeO ₂上负载的甲醇与铜的反应性

TPD-DRIFTS实验首次进行了甲醇吸附在形状良好的二氧化铈（多面体，棒和立方体）上的铜（5 wt％）上的吸附的实验。载体的形态会影响甲氧基和甲酸酯吸附物质的类型。在多面体和棒状催化剂中，线性甲氧基和甲酸是主要物质，而在立方体状催化剂中，桥连物质占主导。在催化剂中，H ₂和CO _2的解吸明显增加，表明除了吸附的甲氧基的脱氢之外，吸附的甲酸盐类物质还在发生氧化。表面位点（铜，二氧化铈和铜/二氧化铈的界面）的异质性，表面缺陷和酸碱性质可能解释了三种铜-二氧化铈催化剂在脱附曲线和吸附物种的反应性上的差异。