Wang Qingyue, Li Zhimin, Bañares Miguel A, Weng Lu-Tao, Gu Qinfen, Price Jason, Han Wei, Yeung King Lun
Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China.
School of Mechatronical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, 100081, Beijing, China.
Small. 2019 Oct;15(42):e1903525. doi: 10.1002/smll.201903525. Epub 2019 Aug 25.
Mixed transition metal oxides (MTMOs) have enormous potential applications in energy and environment. Their use as catalysts for the treatment of environmental pollution requires further enhancement in activity and stability. This work presents a new synthesis approach that is both convenient and effective in preparing binary metal oxide catalysts (CeCuO ) with excellent activity by achieving molecular-level mixing to promote aliovalent substitution. It also allows a single, pure MTMO to be prepared for enhanced stability under reaction by using a bimetallic metal-organic framework (MOF) as the catalyst precursor. This approach also enables the direct manipulation of the shape and form of the MTMO catalyst by controlling the crystallization and growth of the MOF precursor. A 2D CeCuO catalyst is investigated for the oxidation reactions of methanol, acetone, toluene, and o-xylene. The catalyst can catalyze the complete reactions of these molecules into CO at temperatures below 200 °C, representing a significant improvement in performance. Furthermore, the catalyst can tolerate high moisture content without deactivation.
混合过渡金属氧化物（MTMOs）在能源和环境领域具有巨大的潜在应用。将其用作环境污染治理的催化剂，需要进一步提高活性和稳定性。这项工作提出了一种新的合成方法，该方法在制备具有优异活性的二元金属氧化物催化剂（CeCuO）时既方便又有效，通过实现分子水平的混合来促进异价取代。它还允许通过使用双金属金属有机框架（MOF）作为催化剂前体，制备单一的纯MTMO，以提高反应条件下的稳定性。这种方法还能够通过控制MOF前体的结晶和生长，直接调控MTMO催化剂的形状和形态。对二维CeCuO催化剂进行了甲醇、丙酮、甲苯和邻二甲苯氧化反应的研究。该催化剂能够在低于200°C的温度下将这些分子完全催化转化为CO，这代表了性能上的显著提升。此外，该催化剂能够耐受高水分含量而不失活。
