CuO/CuMnO 纳米复合材料的固态构筑：丰富的表面 CuO 物种和氧空位促进 CO 氧化活性。

Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China.

State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, China.

Int J Mol Sci. 2022 Jun 20;23(12):6856. doi: 10.3390/ijms23126856.

Carbon monoxide (CO) oxidation performance heavily depends on the surface-active species and the oxygen vacancies of nanocomposites. Herein, the CuO/CuMnO were fabricated via solid-state strategy. It is manifested that the construction of CuO/CuMnO nanocomposite can produce abundant surface CuO species and a number of oxygen vacancies, resulting in substantially enhanced CO oxidation activity. The CO is completely converted to carbon dioxide (CO) at 75 °C when CuO/CuMnO nanocomposites were involved, which is higher than individual CuO, MnO and CuMnO. Density function theory (DFT) calculations suggest that CO and O are adsorbed on CuO/CuMnO surface with relatively optimal adsorption energy, which is more beneficial for CO oxidation activity. This work presents an effective way to prepare heterogeneous metal oxides with promising application in catalysis.

一氧化碳（CO）的氧化性能很大程度上取决于纳米复合材料的表面活性物种和氧空位。本文通过固态策略制备了 CuO/CuMnO。结果表明，CuO/CuMnO 纳米复合材料的构建可以产生丰富的表面 CuO 物种和大量的氧空位，从而显著提高 CO 氧化活性。当涉及到 CuO/CuMnO 纳米复合材料时，CO 完全在 75°C 时转化为二氧化碳（CO ），高于单独的 CuO、MnO 和 CuMnO。密度泛函理论（DFT）计算表明，CO 和 O 吸附在 CuO/CuMnO 表面上，具有相对最佳的吸附能，这更有利于 CO 氧化活性。这项工作提供了一种制备具有催化应用前景的异质金属氧化物的有效方法。