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Luo J, Zhu X, Zhong Z, Chen G, Hong Y, Zhou Z. Enhanced Catalytic Soot Oxidation over Co-Based Metal Oxides: Effects of Transition Metal Doping. Molecules 2023; 29:41. [PMID: 38202624 PMCID: PMC10779816 DOI: 10.3390/molecules29010041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 12/17/2023] [Accepted: 12/18/2023] [Indexed: 01/12/2024] Open
Abstract
A series of Co-M (M = Fe, Cr, and Mn) catalysts were synthesized by the sol-gel method for soot oxidation in a loose contact mode. The Co-Fe catalyst exhibited the best catalytic activity among the tested samples, with the characteristic temperatures (T10, T50, and T90) of 470 °C, 557 °C, and 602 °C, respectively, which were 57 °C, 51 °C, and 51 °C lower than those of the CoOx catalyst. Catalyst characterizations of N2 adsorption-desorption, X-ray diffraction (XRD), X-ray photo-electron spectrometry (XPS), and the temperature programmed desorption of O2 (O2-TPD) were performed to gain insights into the relationships between the activity of catalytic soot oxidation and the catalyst properties. The content of Co2+ (68.6%) increased due to the interactions between Co and Fe, while the redox properties and the relative concentration of surface oxygen adsorption (51.7%) were all improved, which could significantly boost the activity of catalytic soot oxidation. The effects of NO and contact mode on soot oxidation were investigated over the Co-Fe catalyst. The addition of 1000 ppm of NO led to significant reductions in T10, T50, and T90 by 92 °C, 106 °C, and 104 °C, respectively, compared to the case without the NO addition. In the tight contact mode, the soot oxidation was accelerated over the Co-Fe catalyst, resulting in 46 °C, 50 °C, and 50 °C reductions in T10, T50, and T90 compared to the loose contact mode. The comparison between real soot and model Printex-U showed that the T50 value of real soot (455 °C) was 102 °C lower than the model Printex-U soot.
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Affiliation(s)
- Jianbin Luo
- Faculty of Maritime and Transportation, Ningbo University, Ningbo 315211, China; (J.L.); (Z.Z.); (G.C.)
| | - Xinbo Zhu
- Faculty of Maritime and Transportation, Ningbo University, Ningbo 315211, China; (J.L.); (Z.Z.); (G.C.)
| | - Zhiwei Zhong
- Faculty of Maritime and Transportation, Ningbo University, Ningbo 315211, China; (J.L.); (Z.Z.); (G.C.)
| | - Geng Chen
- Faculty of Maritime and Transportation, Ningbo University, Ningbo 315211, China; (J.L.); (Z.Z.); (G.C.)
| | - Yu Hong
- Faculty of Maritime and Transportation, Ningbo University, Ningbo 315211, China; (J.L.); (Z.Z.); (G.C.)
- New Materials Institute, University of Nottingham Ningbo China, Ningbo 315100, China
| | - Zijian Zhou
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China;
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2
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Sun Y, Fang S, Xu J, Zhang T, Wu Z, Li J, Gao E, Wang W, Dai L, Liu W, Zhang B, Zhang J, Yao S, Zhu J. Unveiling the Surface Chemical Reactions during Multi-Phase Catalytic Oxidation of Soot on Nanoengineering/Interfacing/Doping-Prepared Mn-CeO 2 Catalysts Using TG-MS and Operando DRIFTS-MS. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:15773-15784. [PMID: 37883132 DOI: 10.1021/acs.langmuir.3c02409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2023]
Abstract
The aerosol pyrolysis method from nitrate precursors was used to prepare the Mn-CeO2 catalyst containing Mn2O3, CeO2, and Mn-doped CeO2 nanoparticles for catalyzing carbonous soot oxidation. The prepared Mn-CeO2 catalysts have high specific surface areas, Ce3+ ratio, and oxygen vacancy defects; these are a benefit for soot oxidation. The T50 for soot oxidation on the 0.57Mn-CeO2 catalyst is as low as 355 °C, which is 329 °C lower than that for soot oxidation without a catalyst. The catalysts were characterized using XRD, SEM-EDS, HRTEM, XPS, Raman spectroscopy, H2-TPR-MS, O2-TPD-MS, soot-TPR-MS, and operando DRIFTS-MS. The functions of Mn2O3, CeO2, and Mn-doped CeO2 in the 0.57Mn-CeO2 catalyst are unveiled. Mn-doped CeO2 plays a key role and CeO2 participates in soot oxidation, while Mn2O3 is used to enhance higher ratios of Ce3+, via the reaction of Mn3+ + Ce4+ = Mn4+ + Ce3+. The mechanism of soot oxidation on Mn-CeO2 was proposed.
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Affiliation(s)
- Yan Sun
- School of Environmental Science and Engineering, Changzhou University, Changzhou 213164, China
| | - Shiyu Fang
- School of Environmental Science and Engineering, Changzhou University, Changzhou 213164, China
| | - Jiacheng Xu
- School of Environmental Science and Engineering, Changzhou University, Changzhou 213164, China
- School of Material Science and Engineering, Changzhou University, Changzhou 213164, China
| | - Tiantian Zhang
- School of Environmental Science and Engineering, Changzhou University, Changzhou 213164, China
| | - Zuliang Wu
- School of Environmental Science and Engineering, Changzhou University, Changzhou 213164, China
- Key Laboratory of Advanced Plasma Catalysis Engineering for China Petrochemical Industry, Changzhou 213164, China
| | - Jing Li
- School of Environmental Science and Engineering, Changzhou University, Changzhou 213164, China
- Key Laboratory of Advanced Plasma Catalysis Engineering for China Petrochemical Industry, Changzhou 213164, China
| | - Erhao Gao
- School of Environmental Science and Engineering, Changzhou University, Changzhou 213164, China
- Key Laboratory of Advanced Plasma Catalysis Engineering for China Petrochemical Industry, Changzhou 213164, China
| | - Wei Wang
- School of Environmental Science and Engineering, Changzhou University, Changzhou 213164, China
- Key Laboratory of Advanced Plasma Catalysis Engineering for China Petrochemical Industry, Changzhou 213164, China
| | - Lianxin Dai
- Jiangxi Xintai Functional Materials Technology Co., Ltd., Ji'an, Jiangxi 343100, China
| | - Weihua Liu
- Jiangxi Xintai Functional Materials Technology Co., Ltd., Ji'an, Jiangxi 343100, China
| | - Buhe Zhang
- Jiangxi Xintai Functional Materials Technology Co., Ltd., Ji'an, Jiangxi 343100, China
| | - Junwei Zhang
- Jiangxi Xintai Functional Materials Technology Co., Ltd., Ji'an, Jiangxi 343100, China
| | - Shuiliang Yao
- School of Environmental Science and Engineering, Changzhou University, Changzhou 213164, China
- School of Material Science and Engineering, Changzhou University, Changzhou 213164, China
- Key Laboratory of Advanced Plasma Catalysis Engineering for China Petrochemical Industry, Changzhou 213164, China
| | - Jiali Zhu
- School of Environmental Science and Engineering, Changzhou University, Changzhou 213164, China
- Key Laboratory of Advanced Plasma Catalysis Engineering for China Petrochemical Industry, Changzhou 213164, China
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3
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Rotko M. The use of 18O2 to investigate the soot oxidation process on Co3O4, Co3O4-CeO2 and CeO2 catalysts in tight contact conditions. CATAL COMMUN 2023. [DOI: 10.1016/j.catcom.2023.106644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023] Open
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4
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The decisive factor of hollow spherical network morphology of Nd1-xCexCo1-yCuyO3±δ perovskites towards soot oxidation. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-022-02122-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
AbstractThe perovskites Nd1-xCexCo1-yCuyO3 (x = 0–0.05, y = 0–0.1) have been synthesized using PVP-assisted sol–gel method and applied for soot oxidation reactions. XRD technique reveals the formation of orthorhombic phase with crystal volume of around ~ 214 Å3 and crystal size of ~ 25–40 nm. The interconnected nanoparticles with hollow spherical network morphology of particles are observed for the samples NdCoO3 (NC1) and Nd0.98Ce0.02Co0.95Cu0.05O3 (NC2) with particle sizes of around 300–500 nm. The samples experienced a charge transfer from ligand (O2−) to cobalt cation in UV region (210–260 nm) and also observed broad absorption bands in the visible region (380–600 nm). In addition, the bandgap energy of NC2 showed the lowest value (4.21 eV); as well as surface morphological advantage promoted the transport of surface-chemisorbed oxygen species in the inner and outer surface of catalysts surface due to the reducibility of the catalyst with the soot $$\left( {\frac{{{\text{O}}_{2}^{{{\text{x}} - }} }}{{{\text{O}}_{2}^{{{\text{x}} - }} + {\text{O}}^{2 - } }} = 0.90} \right)$$
O
2
x
-
O
2
x
-
+
O
2
-
=
0.90
. Furthermore, XPS results evidenced the higher content of Co2+ cation upon substitution of Ce/Cu into NC1, which successively formed more amount of Oβ-oxygen species. Remarkably, the perovskite NC2 showed the lowest soot oxidation temperature (T50% = 434 °C) among the investigated perovskites. Besides, the spherically networked morphology of NC2/NC1 samples also decided the soot oxidation process.
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Broccoli-like CeO2 with Hierarchical/Porous Structures, and promoted oxygen vacancy as an enhanced catalyst for catalytic diesel soot elimination. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.119867] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Enhanced Catalytic Soot Oxidation by Ce-Based MOF-Derived Ceria Nano-Bar with Promoted Oxygen Vacancy. Catalysts 2021. [DOI: 10.3390/catal11091128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
As CeO2 is a useful catalyst for soot elimination, it is important to develop CeO2 with higher contact areas, and reactivities for efficient soot oxidation and catalytic soot oxidation are basically controlled by structures and surface properties of catalysts. Herein, a Ce-Metal organic framework (MOFs) consisting of Ce and benzene-1,3,5-tricarboxylic acid (H3BTC) is employed as the precursor as CeBTC exhibits a unique bar-like high-aspect-ratio morphology, which is then transformed into CeO2 with a nanoscale bar-like configuration. More importantly, this CeO2 nanobar (CeONB) possesses porou, and even hollow structures, as well as more oxygen vacancies, enabling CeONB to become a promising catalyst for soot oxidation. Thus, CeONB shows a much higher catalytic activity than commercial CeO2 nanoparticle (comCeO) for soot oxidation with a significantly lower ignition temperature (Tig). Moreover, while soot oxidation by comCeO leads to production of CO together with CO2, CeONB can completely convert soot to CO2. The tight contact mode also enables CeONB to exhibit a very low Tig of 310 °C, whereas the existence of NO also enhances the soot oxidation by CeONB to reduce the Tig. The mechanism of NO-assisted soot oxidation is also examined, and validated by DRIFTS to identify the formation and transformation of nitrogen-containing intermediates. CeONB is also recyclable over many consecutive cycles and maintained its high catalytic activity for soot oxidation. These results demonstrate that CeONB is a promising and easily prepared high-aspect-ratio Ce-based catalyst for soot oxidation.
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Hierarchical ZIF-decorated nanoflower-covered 3-dimensional foam for enhanced catalytic reduction of nitrogen-containing contaminants. J Colloid Interface Sci 2021; 602:95-104. [PMID: 34118608 DOI: 10.1016/j.jcis.2021.05.098] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 05/15/2021] [Accepted: 05/17/2021] [Indexed: 02/02/2023]
Abstract
Metal Organic Frameworks (MOFs) represent a promising class of metallic catalysts for reduction of nitrogen-containing contaminants (NCCs), such as 4-nitrophenol (4-NP). Nevertheless, most researches involving MOFs for 4-NP reduction employ noble metals in the form of fine powders, making these powdered noble metal-based MOFs impractical and inconvenient for realistic applications. Thus, it would be critical to develop non-noble-metal MOFs which can be incorporated into macroscale and porous supports for convenient applications. Herein, the present study proposes to develop a composite material which combines advantageous features of macroscale/porous supports, and nanoscale functionality of MOFs. In particular, copper foam (CF) is selected as a macroscale porous medium, which is covered by nanoflower-structured CoO to increase surfaces for growing a cobaltic MOF, ZIF-67. The resultant composite comprises of CF covered by CoO nanoflowers decorated with ZIF-67 to form a hierarchical 3D-structured catalyst, enabling this ZIF-67@Cu foam (ZIF@CF) a promising catalyst for reducing 4-NP, and other NCCs. Thus, ZIF@CF can readily reduce 4-NP to 4-AP with a significantly lower Ea of 20 kJ/mol than reported values. ZIF@CF could be reused over 10 cycles and remain highly effective for 4-NP reduction. ZIF@CF also efficiently reduces other NCCs, such as 2-nitrophenol, 3-nitrophenol, methylene blue, and methyl orange. ZIF@CF can be adopted as catalytic filters to enable filtration-type reduction of NCCs by passing NCC solutions through ZIF@CF to promptly and conveniently reduce NCCs. The versatile and advantageous catalytic activity of ZIF@CF validates that ZIF@CF is a promising and practical heterogeneous catalyst for reductive treatments of NCCs.
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Laishram D, Krishnapriya R, Saini B, Gupta U, Soni VK, Sharma RK. Nickel and cobalt transfigured natural clay: a green catalyst for low-temperature catalytic soot oxidation. NEW J CHEM 2021. [DOI: 10.1039/d1nj01346g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Modified 'natural clay' with Ni and Co nanoparticles explored as efficient catalyst for low-temperature soot oxidation activity studies.
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Affiliation(s)
- Devika Laishram
- Sustainable Materials and Catalysis Research Laboratory (SMCRL)
- Department of Chemistry
- Indian Institute of Technology
- Karwar
- India
| | - R. Krishnapriya
- Sustainable Materials and Catalysis Research Laboratory (SMCRL)
- Department of Chemistry
- Indian Institute of Technology
- Karwar
- India
| | - Bhagirath Saini
- Sustainable Materials and Catalysis Research Laboratory (SMCRL)
- Department of Chemistry
- Indian Institute of Technology
- Karwar
- India
| | - Unnati Gupta
- Sustainable Materials and Catalysis Research Laboratory (SMCRL)
- Department of Chemistry
- Indian Institute of Technology
- Karwar
- India
| | - Vineet K. Soni
- Sustainable Materials and Catalysis Research Laboratory (SMCRL)
- Department of Chemistry
- Indian Institute of Technology
- Karwar
- India
| | - Rakesh K. Sharma
- Sustainable Materials and Catalysis Research Laboratory (SMCRL)
- Department of Chemistry
- Indian Institute of Technology
- Karwar
- India
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9
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Lourenço AA, Silva VD, da Silva R, Silva U, Chesman C, Salvador C, Simões TA, Macedo DA, da Silva FF. Metal-organic frameworks as template for synthesis of Mn3+/Mn4+ mixed valence manganese cobaltites electrocatalysts for oxygen evolution reaction. J Colloid Interface Sci 2021; 582:124-136. [DOI: 10.1016/j.jcis.2020.08.041] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 07/17/2020] [Accepted: 08/11/2020] [Indexed: 12/16/2022]
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10
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Wang J, Yang S, Sun H, Qiu J, Men Y. Highly improved soot combustion performance over synergetic Mn xCe 1-xO 2 solid solutions within mesoporous nanosheets. J Colloid Interface Sci 2020; 577:355-367. [PMID: 32485417 DOI: 10.1016/j.jcis.2020.05.090] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 05/10/2020] [Accepted: 05/23/2020] [Indexed: 10/24/2022]
Abstract
Constructing synergetic bimetal oxide solid solutions with exceptional catalytic performances for efficient soot elimination is becoming a research frontier in environmental catalysis. Herein, synergetic MnxCe1-xO2 solid solutions within mesoporous nanosheets, synthesized by a facile hydrothermal method for the first time, have been performed to catalyze the NOx-assisted soot combustion. Research results validate that MnxCe1-xO2 solid solutions displayed highly improved soot combustion performance with respect to activity and selectivity, mainly due to the synergetic effect by combining factors of the unique mesoporous nanosheet-shaped feature, the enhanced chemical nature stemmed from high-valence Mn species, abundant active oxygen species originated from the enriched oxygen vacancies and the escalated redox properties. Furthermore, the enhanced NOx storage and oxidation abilities, mainly derived from integrating reciprocal merits of high-valence Mn species and CeO2, were also responsible for the highly improved soot combustion performance via NOx-assisted mechanism. Moreover, MnxCe1-xO2 solid solutions also exhibited excellent reusability due to the unique morphological structure and stable crystal phase, showing good potential in practical applications.
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Affiliation(s)
- Jinguo Wang
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, PR China.
| | - Shuaifeng Yang
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, PR China
| | - Honghua Sun
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, PR China
| | - Jianqiang Qiu
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, PR China
| | - Yong Men
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, PR China
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Xu Z, Yin Q, Li X, Meng Q, Xu L, Lv B, Zhang G. Self-assembly of a highly stable and active Co 3O 4/H-TiO 2 bulk heterojunction with high-energy interfacial structures for low temperature CO catalytic oxidation. Catal Sci Technol 2020. [DOI: 10.1039/d0cy01477j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Self-assembly of a highly stable and active Co3O4/H-TiO2 bulk heterojunction with high-energy interfacial structures was realized for low temperature CO catalytic oxidation.
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Affiliation(s)
- Zehai Xu
- Institute of Oceanic and Environmental Chemical Engineering
- Center for Membrane and Water Science & Technology
- State Key Lab Base of Green Chemical Synthesis Technology
- Zhejiang University of Technology
- Hangzhou 310014
| | - Qingchuan Yin
- Institute of Oceanic and Environmental Chemical Engineering
- Center for Membrane and Water Science & Technology
- State Key Lab Base of Green Chemical Synthesis Technology
- Zhejiang University of Technology
- Hangzhou 310014
| | - Xiong Li
- Institute of Oceanic and Environmental Chemical Engineering
- Center for Membrane and Water Science & Technology
- State Key Lab Base of Green Chemical Synthesis Technology
- Zhejiang University of Technology
- Hangzhou 310014
| | - Qin Meng
- College of Chemical and Biological Engineering
- and State Key Laboratory of Chemical Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Lusheng Xu
- Institute of Oceanic and Environmental Chemical Engineering
- Center for Membrane and Water Science & Technology
- State Key Lab Base of Green Chemical Synthesis Technology
- Zhejiang University of Technology
- Hangzhou 310014
| | - Boshen Lv
- Institute of Oceanic and Environmental Chemical Engineering
- Center for Membrane and Water Science & Technology
- State Key Lab Base of Green Chemical Synthesis Technology
- Zhejiang University of Technology
- Hangzhou 310014
| | - Guoliang Zhang
- Institute of Oceanic and Environmental Chemical Engineering
- Center for Membrane and Water Science & Technology
- State Key Lab Base of Green Chemical Synthesis Technology
- Zhejiang University of Technology
- Hangzhou 310014
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