Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan , Jinan, Shandong 255022, China.
Shandong Institute and Laboratory of Geological Sciences , Jinan, Shandong 255013, China.
ACS Appl Mater Interfaces. 2017 Nov 15;9(45):39594-39601. doi: 10.1021/acsami.7b11916. Epub 2017 Nov 2.
Metal-organic frameworks (MOFs) have been widely used to prepare corresponding porous metal oxides via thermal treatment. However, high temperature treatment always leads to obtained metal oxides with a large crystallite size, thus decreasing their specific surface area. Different from the conventional complete thermal decomposition of MOFs, herein, using Ce-MOF as a demonstration, we choose partial thermal decomposition of MOF, followed by selective etching to prepare porous/hollow structured ceria because of the poor stability of Ce-MOF under acidic conditions. Compared with the ceria derived from complete thermal decomposition of Ce-MOF, the as-prepared ceria is demonstrated to be a good support for copper oxide species during the CO oxidation catalytic reaction. Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and hydrogen temperature-programmed reduction (H-TPR) analysis revealed that the as-prepared ceria is favorable for strengthening the interaction between the ceria and loaded copper oxide species. This work is expected to open a new, simple avenue for the synthesis of metal oxides from MOFs via partial thermal decomposition.
金属-有机骨架（MOFs）已被广泛用于通过热处理制备相应的多孔金属氧化物。然而，高温处理通常会导致所获得的金属氧化物具有较大的晶粒尺寸，从而降低其比表面积。与 MOFs 的常规完全热分解不同，在此，我们以 Ce-MOF 为例，由于 Ce-MOF 在酸性条件下稳定性差，选择 MOF 的部分热分解，然后进行选择性刻蚀，以制备多孔/空心结构的氧化铈。与完全热分解 Ce-MOF 得到的氧化铈相比，所制备的氧化铈在 CO 氧化催化反应中被证明是氧化铜物种的良好载体。拉曼光谱、X 射线光电子能谱（XPS）和氢气程序升温还原（H-TPR）分析表明，所制备的氧化铈有利于增强氧化铈和负载氧化铜物种之间的相互作用。这项工作有望为通过部分热分解从 MOFs 合成金属氧化物开辟一条新的、简单的途径。
