Wang Xiao, Zhao Shuna, Zhang Yibo, Wang Zhuo, Feng Jing, Song Shuyan, Zhang Hongjie
State Key Laboratory of Rare Earth Resource Utilization , Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China . Email:
Chem Sci. 2016 Feb 1;7(2):1109-1114. doi: 10.1039/c5sc03430b. Epub 2015 Oct 28.
Recently, mixed metal oxides have attracted tremendous interest because of their great importance for fundamental studies and practical applications in the catalytic field to replace expensive noble metals. Herein, we report the designed synthesis of novel CeO-CoO mixed metal oxides with complex nanostructures using uniform short CeO nanowires self-inserted into ZIF-67 nanocrystals as precursors followed by a thermal annealing treatment. Interestingly, such a synthetic strategy can be easily extended to fabricate other CeO nanowires inserted into metal oxide nanoframeworks such as NiCoO and ZnCoO. Choosing the NO reduction reaction by CO as the catalytic model, the as-obtained CeO-CoO hybrids exhibited enhanced catalytic performance, which could be attributed to the strong two-phase interaction between each component.
近年来，混合金属氧化物因其在催化领域对于基础研究和实际应用的重要性而备受关注，有望取代昂贵的贵金属。在此，我们报道了一种新颖的CeO-CoO混合金属氧化物的设计合成方法，该方法以均匀短CeO纳米线自插入ZIF-67纳米晶体作为前驱体，随后进行热退火处理，从而制备出具有复杂纳米结构的产物。有趣的是，这种合成策略可以很容易地扩展到制备其他插入金属氧化物纳米框架（如NiCoO和ZnCoO）中的CeO纳米线。以CO还原NO反应作为催化模型，所制备的CeO-CoO杂化物表现出增强的催化性能，这可归因于各组分之间强烈的两相相互作用。
