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Grabchenko MV, Mikheeva NN, Mamontov GV, Cortés Corberán V, Litvintseva KA, Svetlichnyi VA, Vodyankina OV, Salaev MA. Unraveling the Structural and Compositional Peculiarities in CTAB-Templated CeO 2-ZrO 2-MnO x Catalysts for Soot and CO Oxidation. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:3108. [PMID: 38133005 PMCID: PMC10745992 DOI: 10.3390/nano13243108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 12/02/2023] [Accepted: 12/05/2023] [Indexed: 12/23/2023]
Abstract
Structure-performance relationships in functional catalysts allow for controlling their performance in a wide range of reaction conditions. Here, the structural and compositional peculiarities in CTAB-templated CeO2-ZrO2-MnOx catalysts prepared by co-precipitation of precursors and their catalytic behavior in CO oxidation and soot combustion are discussed. A complex of physical-chemical methods (low-temperature N2 sorption, XRD, TPR-H2, Raman, HR TEM, XPS) is used to elucidate the features of the formation of interphase boundaries, joint phases, and defects in multicomponent oxide systems. The addition of Mn and/or Zr dopant to ceria is shown to improve its performance in both reactions. Binary Ce-Mn catalysts demonstrate enhanced performance closely followed by the ternary oxide catalysts, which is due the formation of several types of active sites, namely, highly dispersed MnOx species, oxide-oxide interfaces, and oxygen vacancies that can act individually and/or synergistically.
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Affiliation(s)
- Maria V. Grabchenko
- Laboratory of Catalytic Research, Tomsk State University, 634050 Tomsk, Russia;
| | - Natalia N. Mikheeva
- Research Laboratory of Porous Materials and Sorption, Tomsk State University, 634050 Tomsk, Russia (O.V.V.)
| | - Grigory V. Mamontov
- Research Laboratory of Porous Materials and Sorption, Tomsk State University, 634050 Tomsk, Russia (O.V.V.)
| | - Vicente Cortés Corberán
- Instituto de Catálisis y Petroleoquímica (ICP), Consejo Superior de Investigaciones Científicas (CSIC), 28049 Madrid, Spain;
| | - Kseniya A. Litvintseva
- Boreskov Institute of Catalysis SB RAS (BIC SB RAS), 630090 Novosibirsk, Russia
- Department of Physics, Novosibirsk State University, 630090 Novosibirsk, Russia
| | - Valery A. Svetlichnyi
- Laboratory of Advanced Materials and Technology, Siberian Physical Technical Institute, Tomsk State University, 634050 Tomsk, Russia
| | - Olga V. Vodyankina
- Research Laboratory of Porous Materials and Sorption, Tomsk State University, 634050 Tomsk, Russia (O.V.V.)
| | - Mikhail A. Salaev
- Laboratory of Catalytic Research, Tomsk State University, 634050 Tomsk, Russia;
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Yang J, Li J, Kang J, Liu W, Kuang Y, Tan H, Yu Z, Yang L, Yang X, Yu K, Fan Y. Preparation of Ce-MnO x Composite Oxides via Coprecipitation and Their Catalytic Performance for CO Oxidation. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2158. [PMID: 37570476 PMCID: PMC10421365 DOI: 10.3390/nano13152158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 07/17/2023] [Accepted: 07/20/2023] [Indexed: 08/13/2023]
Abstract
Ce-MnOx composite oxide catalysts with different proportions were prepared using the coprecipitation method, and the CO-removal ability of the catalysts with the tested temperature range of 60-140 °C was investigated systematically. The effect of Ce and Mn ratios on the catalytic oxidation performance of CO was investigated using X-ray diffraction (XRD), X-ray energy dispersive spectroscopy (EDS), scanning electron microscopy (SEM), H2 temperature programmed reduction (H2-TPR), CO-temperature programmed desorption (CO-TPD), and in situ infrared spectra. The experimental results reveal that under the same test conditions, the CO conversion rate of pure Mn3O4 reaches 95.4% at 170 °C. Additionally, at 140 °C, the Ce-MnOx series composite oxide catalyst converts CO at a rate of over 96%, outperforming single-phase Mn3O4 in terms of catalytic performance. With the decrement in Ce content, the performance of Ce-MnOx series composite oxide catalysts first increase and then decrease. The Ce MnOx catalyst behaves best when Ce:Mn = 1:1, with a CO conversion rate of 99.96% at 140 °C and 91.98% at 100 °C.
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Affiliation(s)
- Junsheng Yang
- College of Mechanical Engineering, Wuhan Polytechnic University, Wuhan 430048, China; (J.Y.); (J.L.); (W.L.); (Y.K.); (Z.Y.); (L.Y.); (X.Y.)
| | - Jie Li
- College of Mechanical Engineering, Wuhan Polytechnic University, Wuhan 430048, China; (J.Y.); (J.L.); (W.L.); (Y.K.); (Z.Y.); (L.Y.); (X.Y.)
| | - Jiangang Kang
- Zhongye Changtian International Engineering Co., Ltd., Changsha 410205, China;
| | - Wenkang Liu
- College of Mechanical Engineering, Wuhan Polytechnic University, Wuhan 430048, China; (J.Y.); (J.L.); (W.L.); (Y.K.); (Z.Y.); (L.Y.); (X.Y.)
| | - Yijian Kuang
- College of Mechanical Engineering, Wuhan Polytechnic University, Wuhan 430048, China; (J.Y.); (J.L.); (W.L.); (Y.K.); (Z.Y.); (L.Y.); (X.Y.)
| | - Hua Tan
- State Key Laboratory of Material Processing and Die & Mould Technology, Wuhan 430074, China;
- School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Zhensen Yu
- College of Mechanical Engineering, Wuhan Polytechnic University, Wuhan 430048, China; (J.Y.); (J.L.); (W.L.); (Y.K.); (Z.Y.); (L.Y.); (X.Y.)
| | - Liu Yang
- College of Mechanical Engineering, Wuhan Polytechnic University, Wuhan 430048, China; (J.Y.); (J.L.); (W.L.); (Y.K.); (Z.Y.); (L.Y.); (X.Y.)
| | - Xuejin Yang
- College of Mechanical Engineering, Wuhan Polytechnic University, Wuhan 430048, China; (J.Y.); (J.L.); (W.L.); (Y.K.); (Z.Y.); (L.Y.); (X.Y.)
| | - Kui Yu
- College of Mechanical Engineering, Wuhan Polytechnic University, Wuhan 430048, China; (J.Y.); (J.L.); (W.L.); (Y.K.); (Z.Y.); (L.Y.); (X.Y.)
| | - Yiquan Fan
- College of Mechanical Engineering, Wuhan Polytechnic University, Wuhan 430048, China; (J.Y.); (J.L.); (W.L.); (Y.K.); (Z.Y.); (L.Y.); (X.Y.)
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