MnFeOx@TiO2 Nanocages for Selective Catalytic Reduction of NO with NH3 at Low Temperature
Source abstract
Abstract
Based on Prussian blue analogues (PBAs), using the in situ self-assembly method, MnFeOx@TiO2 double-walled nanocages with a hollow and porous structure were constructed by annealing the core–shell structure of Mn3[Fe(CN)6]2·nH2O@Ti(OH)4. Compared with the MnFeOx single-walled nanocages without the TiO2 shell, the MnFeOx@TiO2 double-walled nanocages exhibited a better catalytic performance in selective catalytic reduction (SCR) with NH3 at low temperatures, and the NO removal efficiency could reach 80% at 145–260 °C. Establishing the TiO2 shell layer could effectively improve the adsorption and activation performance of the reactants. Through a series of characterizations, it was confirmed that the MnFeOx@TiO2 double-walled nanocages possessed a large specific surface area, abundant structural defects, and oxygen vacancies. Besides, the MnFeOx@TiO2 catalyst had more Mn4+ species, higher Fe3+ species, more surface-adsorbed oxygen (Oads) species, and a strong interaction between MnOx, FeOx, and the TiO2 shell, which led to better catalytic activity. At the same time, the MnFeOx@TiO2 double-walled nanocages exhibited satisfactory thermal stability and better H2O resistance.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Catalytic Processes in Materials Science · Advanced Photocatalysis Techniques · Metal-Organic Frameworks: Synthesis and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory for Oxo Synthesis and Selective Oxidation, and National Engineering Research Center for Fine Petrochemical Intermediates, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
School of Petroleum and Chemical, Lanzhou University of Technology, Lanzhou 730050, P. R. China
Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China
Funding
National Natural Science Foundation of China · Science and Technology Service Network Initiative (STS) of Chinese Academy of Science · Key Research and Development Program of Gansu Province · Major Project of Inner Mongolia Science and Technology · DNL Cooperation Fund, CAS · Kuancheng Wang Pioneer Talents Program of Chinese Academy of Sciences
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