Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30-239 Krakow, Poland.
Molecules. 2022 Jul 26;27(15):4790. doi: 10.3390/molecules27154790.
The formation, properties, decomposition and reactions of ethoxy groups on ZrO, CuO, and CuO/ZrO were followed by IR spectroscopy. The reaction of ethanol with terminal Zr-OH groups leads to the formation of monodendate ethoxy groups (type I), whereas the reaction of ethanol with tribridged Zr-OH grups results in the formation of bidendate ethoxyls (type II). In both cases, water is produced. Ethoxy groups of type II were also formed on CuO. The type of the surface species detected after interaction of ethanol with CuO/ZrO was the same as detected for both oxides (i.e., ZrO and CuO) separately. This suggests that no new phase was formed in the mixed oxide system. At higher temperatures, ethoxy groups were oxidized forming acetate ions. Gaseous ethanol present in the cell was oxidized to acetaldehyde without the intermediacy of ethoxy groups.
通过红外光谱法研究了 ZrO、CuO 和 CuO/ZrO 上乙氧基的形成、性质、分解和反应。乙醇与末端 Zr-OH 基团的反应导致单齿乙氧基的形成（类型 I），而乙醇与三桥接 Zr-OH 基团的反应导致双齿乙氧基的形成（类型 II）。在这两种情况下，都会生成水。CuO 上也形成了类型 II 的乙氧基。与 CuO/ZrO 相互作用后检测到的表面物种的类型与单独检测到的两种氧化物（即 ZrO 和 CuO）相同。这表明在混合氧化物体系中没有形成新相。在较高温度下，乙氧基被氧化形成乙酸根离子。在电池中存在的气态乙醇不经乙氧基中间体而被氧化为乙醛。
