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Morphology effects in MnCeOx solid solution-catalyzed NO reduction with CO: Active sites, water tolerance, and reaction pathway by Quanquan Shi; Yifei Zhang; Zhiwen Li; Zhongkang Han; Liangliang Xu; Alfons Baiker; Gao Li is a Materials Science article available to read on EtoBox.
What is Morphology effects in MnCeOx solid solution-catalyzed NO reduction with CO: Active sites, water tolerance, and reaction pathway about?
Morphological effects of nanoparticles are crucial in many solid-catalyzed chemical transformations. We herein prepared two manganese-ceria solid solutions, well-defined MnCeO x nanorods and MnCeO x -nanocubes, exposing preferentially ( 111) and (100) facets of ceria, respectively. The incorporation of Mn dopant into ceria lattice strongly enhanced the catalytic performance in the NO reduction with CO. MnCeO x (111) catalyst outperformed MnCeO x (100) counterpart due to its higher population density of oxygen vacancy defects. In-situ infrared spectroscopy investigations indicated that the reaction pathway over MnCeO x and pristine CeO 2 is similar and that besides the direct pathway, an indirect pathway via adsorbed hyponitrite as an intermediate cannot be ruled out. X-ray photoelectron and Raman spectroscopies as well as first-principles density functional theory (DFT) calculations indicate that the enhanced catalytic performance of MnCeO x can be traced back to its "Mn-O L (VÖ)-Mn-O L (VÖ)-Ce" connectivities. The Mn dopant strongly facilitates the formation of surface oxygen vacancies (VÖ) by liberating surface lattice oxygen (O L ) via CO\* + O L → CO 2 \* + VÖ and promotes the
Who reads Morphology effects in MnCeOx solid solution-catalyzed NO reduction with CO: Active sites, water tolerance, and reaction pathway?
It is typically read by researchers, students, and practitioners in Materials Science.
- Author
- Quanquan Shi; Yifei Zhang; Zhiwen Li; Zhongkang Han; Liangliang Xu; Alfons Baiker; Gao Li
- Publisher
- Springer Science and Business Media LLC
- Published
- 2023
- Language
- EN
- Field
- Materials Science (Physical Sciences)