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Liu L, Xu Y, Su J, Wei J, Liu X, Peng Q, Chang J, Teng B. Exploring microstructures of metal-doped oxides via simulated Raman spectrum. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 320:124616. [PMID: 38857547 DOI: 10.1016/j.saa.2024.124616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 05/30/2024] [Accepted: 06/05/2024] [Indexed: 06/12/2024]
Abstract
Solid solution of metal-doped oxide has been widely used in material industry and catalysis process. Its performance is highly correlated with the distribution of doped ions. Due to the complex distribution of doped ions in solid solution and its variation with temperatures, to obtain the microstructures of metal-doped ions in solid solution remains a substantial challenge. Taken Ce1-xZrxO2 as a model, the global structure searching, structures proportion with temperature determined by Boltzmann distribution, and the weighted simulation Raman spectra were integrated to explore the microstructures of metal-doped solid solution oxides. It was further verified by application into rutile and anatase TiO2 mixture, indicating that the present method is feasible to deduce the microstructure of metal composite oxides. We anticipate that it provides a powerful solution to explore microstructures of solid solution and complex metal oxides.
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Affiliation(s)
- Le Liu
- Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Yuxing Xu
- Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China
| | - Junchao Su
- Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Jiangtao Wei
- Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Xingchen Liu
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
| | - Qing Peng
- State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China.
| | - Jie Chang
- Institute of Sustainability of Chemical, Energy and Environment, Agency for Science, Technology and Research, Singapore 627833, Singapore.
| | - Botao Teng
- Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, China.
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2
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Khatun S, Shimizu K, Pal S, Nandi S, Watanabe S, Roy P. Enthralling Anodic Protection by Molybdate on High-Entropy Alloy-Based Electrocatalyst for Sustainable Seawater Oxidation. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2402720. [PMID: 38924374 DOI: 10.1002/smll.202402720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2024] [Revised: 06/04/2024] [Indexed: 06/28/2024]
Abstract
Efficient and sustainable seawater electrolysis is still limited due to the interference of chloride corrosion at the anode. The designing of suitable electrocatalysts is one of the crucial ways to boost electrocatalytic activity. However, the approach may fall short as achieving high current density often occurs in chlorine evolution reaction (CER)-dominating potential regions. Thereby, apart from developing an OER-active high-entropy alloy-based electrocatalyst, the present study also offers a unique way to protect anode surface under high current density or potential by using MoO4 2- as an effective inhibitor during seawater oxidation. The wide variation of d-band center of high-entropy alloy-based electrocatalyst allows great oxygen evolution reaction (OER) proficiency exhibiting an overpotential of 230 mV at current density of 20 mA cm-2. Besides, the electrocatalyst demonstrates impressive stability over 500 h at high current density of 1 A cm-2 or at a high oxidation potential of 2.0 V versus RHE in the presence of a molybdate inhibitor. Theoretical and experimental studies reveal MoO4 2- electrostatically accumulated at anode surface due to higher adsorption ability, thereby creating a protective layer against chlorides without affecting OER.
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Affiliation(s)
- Sakila Khatun
- CSIR - Central Mechanical Engineering Research Institute (CMERI), Mahatma Gandhi Avenue, Durgapur, West Bengal, 713209, India
- Academy of Scientific and Innovative Research (AcSIR), CSIR- Human Resource Development Centre (CSIR-HRDC), Ghaziabad, Uttar Pradesh, 201002, India
| | - Koji Shimizu
- Department of Materials Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Santanu Pal
- CSIR - Central Mechanical Engineering Research Institute (CMERI), Mahatma Gandhi Avenue, Durgapur, West Bengal, 713209, India
- Academy of Scientific and Innovative Research (AcSIR), CSIR- Human Resource Development Centre (CSIR-HRDC), Ghaziabad, Uttar Pradesh, 201002, India
| | - Saikat Nandi
- Department of Physics, Indian Institute of Technology Bombay, Mumbai, Maharashtra, 400076, India
| | - Satoshi Watanabe
- Department of Materials Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Poulomi Roy
- CSIR - Central Mechanical Engineering Research Institute (CMERI), Mahatma Gandhi Avenue, Durgapur, West Bengal, 713209, India
- Academy of Scientific and Innovative Research (AcSIR), CSIR- Human Resource Development Centre (CSIR-HRDC), Ghaziabad, Uttar Pradesh, 201002, India
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3
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Lucentini I, Serrano I, Garcia X, Manjón AG, Hu X, Arbiol J, Pascua-Solé L, Prat J, Villalobos-Portillo EE, Marini C, Escudero C, Llorca J. Ni-Ru supported on CeO 2 obtained by mechanochemical milling for catalytic hydrogen production from ammonia. iScience 2024; 27:110028. [PMID: 38868207 PMCID: PMC11167440 DOI: 10.1016/j.isci.2024.110028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 03/12/2024] [Accepted: 05/16/2024] [Indexed: 06/14/2024] Open
Abstract
Developing active and stable catalysts for carbon-free hydrogen production is crucial to mitigate the effects of climate change. Ammonia is a promising carbon-free hydrogen source, as it has a high hydrogen content and is liquid at low pressure, which allows its easy storage and transportation. We have recently developed a nickel-based catalyst with a small content of ruthenium supported on cerium oxide, which exhibits high activity and stability in ammonia decomposition. Here, we investigate mechanochemical milling for its synthesis, a faster and less energy-consuming technique than conventional ones. Results indicate that mechanochemical synthesis increases catalytic activity compared to the conventional incipient wetness impregnation method. The interaction between the metal precursors and the support is key in fine-tuning catalytic activity, which increases linearly with oxygen vacancies in the support. Moreover, the mechanochemical method modifies the oxidation state of Ni and Ru species, with a variation depending on the precursors.
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Affiliation(s)
- Ilaria Lucentini
- Institute of Energy Technologies, Department of Chemical Engineering and Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya, EEBE, Eduard Maristany 10-14, 08019 Barcelona, Spain
- ALBA Synchrotron Light Source, Carrer de la Llum 2-26, 08290 Cerdanyola del Valles, Barcelona, Spain
| | - Isabel Serrano
- Institute of Energy Technologies, Department of Chemical Engineering and Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya, EEBE, Eduard Maristany 10-14, 08019 Barcelona, Spain
| | - Xènia Garcia
- Institute of Energy Technologies, Department of Chemical Engineering and Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya, EEBE, Eduard Maristany 10-14, 08019 Barcelona, Spain
| | - Alba Garzón Manjón
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, 08193 Barcelona, Catalonia, Spain
| | - Xinxin Hu
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, 08193 Barcelona, Catalonia, Spain
| | - Jordi Arbiol
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, 08193 Barcelona, Catalonia, Spain
- ICREA, Pg. Lluís Companys 23, 08010 Barcelona, Catalonia, Spain
| | - Laia Pascua-Solé
- Institute of Energy Technologies, Department of Chemical Engineering and Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya, EEBE, Eduard Maristany 10-14, 08019 Barcelona, Spain
| | - Jordi Prat
- ALBA Synchrotron Light Source, Carrer de la Llum 2-26, 08290 Cerdanyola del Valles, Barcelona, Spain
| | | | - Carlo Marini
- ALBA Synchrotron Light Source, Carrer de la Llum 2-26, 08290 Cerdanyola del Valles, Barcelona, Spain
| | - Carlos Escudero
- ALBA Synchrotron Light Source, Carrer de la Llum 2-26, 08290 Cerdanyola del Valles, Barcelona, Spain
| | - Jordi Llorca
- Institute of Energy Technologies, Department of Chemical Engineering and Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya, EEBE, Eduard Maristany 10-14, 08019 Barcelona, Spain
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4
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Elmutasim O, Hussien AG, Sharan A, AlKhoori S, Vasiliades MA, Taha IMA, Kim S, Harfouche M, Emwas AH, Anjum DH, Efstathiou AM, Yavuz CT, Singh N, Polychronopoulou K. Evolution of Oxygen Vacancy Sites in Ceria-Based High-Entropy Oxides and Their Role in N 2 Activation. ACS APPLIED MATERIALS & INTERFACES 2024; 16. [PMID: 38684003 PMCID: PMC11082846 DOI: 10.1021/acsami.3c16521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 04/01/2024] [Accepted: 04/05/2024] [Indexed: 05/02/2024]
Abstract
In this work, a relatively new class of materials, rare earth (RE) based high entropy oxides (HEO) are discussed in terms of the evolution of the oxygen vacant sites (Ov) content in their structure as the composition changes from binary to HEO using both experimental and computational tools; the composition of HEO under focus is the CeLaPrSmGdO due to the importance of ceria-related (fluorite) materials to catalysis. To unveil key features of quinary HEO structure, ceria-based binary CePrO and CeLaO compositions as well as SiO2, the latter as representative nonreducible oxide, were used and compared as supports for Ru (6 wt % loading). The role of the Ov in the HEO is highlighted for the ammonia production with particular emphasis on the N2 dissociation step (N2(ads) → Nads) over a HEO; the latter step is considered the rate controlling one in the ammonia production. Density functional theory (DFT) calculations and 18O2 transient isotopic experiments were used to probe the energy of formation, the population, and the easiness of formation for the Ov at 650 and 800 °C, whereas Synchrotron EXAFS, Raman, EPR, and XPS probed the Ce-O chemical environment at different length scales. In particular, it was found that the particular HEO composition eases the Ov formation in bulk, in medium (Raman), and in short (localized) order (EPR); more Ov population was found on the surface of the HEO compared to the binary reference oxide (CePrO). Additionally, HEO gives rise to smaller and less sharp faceted Ru particles, yet in stronger interaction with the HEO support and abundance of Ru-O-Ce entities (Raman and XPS). Ammonia production reaction at 400 °C and in the 10-50 bar range was performed over Ru/HEO, Ru/CePrO, Ru/CeLaO, and Ru/SiO2 catalysts; the Ru/HEO had superior performance at 10 bar compared to the rest of catalysts. The best performing Ru/HEO catalyst was activated under different temperatures (650 vs 800 °C) so to adjust the Ov population with the lower temperature maintaining better performance for the catalyst. DFT calculations showed that the HEO active site for N adsorption involves the Ov site adjacent to the adsorption event.
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Affiliation(s)
- Omer Elmutasim
- Mechanical
Engineering Department, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
- Center
for Catalysis and Separation (CeCaS), Khalifa
University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
| | - Aseel G. Hussien
- Mechanical
Engineering Department, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
- Center
for Catalysis and Separation (CeCaS), Khalifa
University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
| | - Abhishek Sharan
- Center
for Catalysis and Separation (CeCaS), Khalifa
University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
- Physics
Department, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
| | - Sara AlKhoori
- Mechanical
Engineering Department, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
- Center
for Catalysis and Separation (CeCaS), Khalifa
University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
| | - Michalis A. Vasiliades
- Department
of Chemistry, Heterogeneous Catalysis Laboratory, University of Cyprus, 1 University Avenue, University Campus, 2109 Nicosia, Cyprus
| | | | - Seokjin Kim
- Oxide
& Organic Nanomaterials for Energy & Environment (ONE) Laboratory,
Advanced Membranes & Porous Materials (AMPM) Center, and KAUST
Catalysis Center (KCC), Physical Science & Engineering (PSE), King Abdullah University of Science and Technology
(KAUST), Thuwal 23955, Saudi Arabia
| | - Messaoud Harfouche
- Synchrotron-Light
for Experimental Science and Applications in the Middle East (SESAME), Allan 19252, Jordan
| | - Abdul-Hamid Emwas
- Core
Laboratories, King Abdullah University of
Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Dalaver H. Anjum
- Center
for Catalysis and Separation (CeCaS), Khalifa
University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
- Physics
Department, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
| | - Angelos M. Efstathiou
- Department
of Chemistry, Heterogeneous Catalysis Laboratory, University of Cyprus, 1 University Avenue, University Campus, 2109 Nicosia, Cyprus
| | - Cafer T. Yavuz
- Oxide
& Organic Nanomaterials for Energy & Environment (ONE) Laboratory,
Advanced Membranes & Porous Materials (AMPM) Center, and KAUST
Catalysis Center (KCC), Physical Science & Engineering (PSE), King Abdullah University of Science and Technology
(KAUST), Thuwal 23955, Saudi Arabia
| | - Nirpendra Singh
- Center
for Catalysis and Separation (CeCaS), Khalifa
University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
- Physics
Department, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
| | - Kyriaki Polychronopoulou
- Mechanical
Engineering Department, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
- Center
for Catalysis and Separation (CeCaS), Khalifa
University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
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5
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Pei C, Chen S, Fu D, Zhao ZJ, Gong J. Structured Catalysts and Catalytic Processes: Transport and Reaction Perspectives. Chem Rev 2024; 124:2955-3012. [PMID: 38478971 DOI: 10.1021/acs.chemrev.3c00081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2024]
Abstract
The structure of catalysts determines the performance of catalytic processes. Intrinsically, the electronic and geometric structures influence the interaction between active species and the surface of the catalyst, which subsequently regulates the adsorption, reaction, and desorption behaviors. In recent decades, the development of catalysts with complex structures, including bulk, interfacial, encapsulated, and atomically dispersed structures, can potentially affect the electronic and geometric structures of catalysts and lead to further control of the transport and reaction of molecules. This review describes comprehensive understandings on the influence of electronic and geometric properties and complex catalyst structures on the performance of relevant heterogeneous catalytic processes, especially for the transport and reaction over structured catalysts for the conversions of light alkanes and small molecules. The recent research progress of the electronic and geometric properties over the active sites, specifically for theoretical descriptors developed in the recent decades, is discussed at the atomic level. The designs and properties of catalysts with specific structures are summarized. The transport phenomena and reactions over structured catalysts for the conversions of light alkanes and small molecules are analyzed. At the end of this review, we present our perspectives on the challenges for the further development of structured catalysts and heterogeneous catalytic processes.
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Affiliation(s)
- Chunlei Pei
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
| | - Sai Chen
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
| | - Donglong Fu
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
| | - Zhi-Jian Zhao
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
| | - Jinlong Gong
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou 350207, China
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China
- National Industry-Education Platform of Energy Storage, Tianjin University, 135 Yaguan Road, Tianjin 300350, China
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6
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Siddiqui H, Kumar S, Naidu P, Gupta S, Mishra S, Goswami M, Sairkar PK, Atram L, Sathish N, Kumar S. Solanum tuberosum tuber-driven starch-mediated green-hydrothermal synthesis of cerium oxide nanoparticles for efficient photocatalysis and antimicrobial activities. CHEMOSPHERE 2024; 352:141418. [PMID: 38340994 DOI: 10.1016/j.chemosphere.2024.141418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 11/07/2023] [Accepted: 02/07/2024] [Indexed: 02/12/2024]
Abstract
In this study, we are reporting for the first time the utilization of Solanum tuberosum tuber-driven, starch-mediated, green-hydrothermally synthesized cerium oxide nanoparticles (G-CeO2 NPs) for the antibacterial activity and photodegradation of cationic (methylene blue, MB) and anionic (methyl orange, MO) dyes separately and in combination, aimed at environmental remediation. The XRD analysis confirms the fluorite structure of G-CeO2 NPs, displaying an average crystallite size of 9.6 nm. Further, XPS confirms the existence of 24% of Ce3+ oxidation states within G-CeO2 NPs. Morphological studies through FE-SEM and TEM reveal that starch-driven OH- ion production leads to a high percentage of active crystal facets, favoring the formation of Ce3+-rich CeO2 NPs. Photocatalytic experiments conducted under UV-A illumination demonstrate the superior degradation performance of G-CeO2 NPs, with MB degradation reaching 93.4% and MO degradation at 77.2% within 90 min. This outstanding catalytic activity is attributed to the mesoporous structure (pore diameter of 5.63 nm) with a narrow band gap, a large surface area (103.38 m2g-1), and reduced charge recombination, as validated by BET, UV-visible, and electrochemical investigations. The identification of photogenerated intermediates is achieved through LCMS, while the mineralization is monitored via total organic carbon analysis. Moreover, the scavenging experiments point towards the involvement of reactive oxygen species in organic oxidation, demonstrating efficiency over five consecutive trials. Additionally, G-CeO2 NPs exhibit potent antibacterial activity against both gram-positive and gram-negative bacteria. This study presents an innovative, and efficient approach to environmental remediation, shedding light on the potential of G-CeO2 NPs in addressing environmental pollution challenges.
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Affiliation(s)
- Hafsa Siddiqui
- CSIR - Advanced Materials and Processes Research Institute (AMPRI), Bhopal, 462026, India
| | - Satendra Kumar
- CSIR - Advanced Materials and Processes Research Institute (AMPRI), Bhopal, 462026, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Palash Naidu
- Rani Durgavati Vishwavidyalaya, Jabalpur, 482001, India
| | - Shaily Gupta
- Department of Chemical Engineering, Vellore Institute of Technology, Vellore, 632014, India
| | - Shivi Mishra
- Rani Durgavati Vishwavidyalaya, Jabalpur, 482001, India
| | - Manoj Goswami
- CSIR - Advanced Materials and Processes Research Institute (AMPRI), Bhopal, 462026, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Pramod Kumar Sairkar
- Centre of Excellence in Biotechnology, Madhya Pradesh Council of Science & Technology, Bhopal, 462003, India
| | - Lakshmikant Atram
- CSIR - Advanced Materials and Processes Research Institute (AMPRI), Bhopal, 462026, India
| | - N Sathish
- CSIR - Advanced Materials and Processes Research Institute (AMPRI), Bhopal, 462026, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Surender Kumar
- CSIR - Advanced Materials and Processes Research Institute (AMPRI), Bhopal, 462026, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
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7
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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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8
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Muravev V, Parastaev A, van den Bosch Y, Ligt B, Claes N, Bals S, Kosinov N, Hensen EJM. Size of cerium dioxide support nanocrystals dictates reactivity of highly dispersed palladium catalysts. Science 2023; 380:1174-1179. [PMID: 37319196 DOI: 10.1126/science.adf9082] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Accepted: 05/15/2023] [Indexed: 06/17/2023]
Abstract
The catalytic performance of heterogeneous catalysts can be tuned by modulation of the size and structure of supported transition metals, which are typically regarded as the active sites. In single-atom metal catalysts, the support itself can strongly affect the catalytic properties. Here, we demonstrate that the size of cerium dioxide (CeO2) support governs the reactivity of atomically dispersed palladium (Pd) in carbon monoxide (CO) oxidation. Catalysts with small CeO2 nanocrystals (~4 nanometers) exhibit unusually high activity in a CO-rich reaction feed, whereas catalysts with medium-size CeO2 (~8 nanometers) are preferred for lean conditions. Detailed spectroscopic investigations reveal support size-dependent redox properties of the Pd-CeO2 interface.
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Affiliation(s)
- Valery Muravev
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, Netherlands
| | - Alexander Parastaev
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, Netherlands
| | - Yannis van den Bosch
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, Netherlands
| | - Bianca Ligt
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, Netherlands
| | - Nathalie Claes
- Electron Microscopy for Materials Science (EMAT), University of Antwerp, 2020 Antwerp, Belgium
| | - Sara Bals
- Electron Microscopy for Materials Science (EMAT), University of Antwerp, 2020 Antwerp, Belgium
| | - Nikolay Kosinov
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, Netherlands
| | - Emiel J M Hensen
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, Netherlands
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9
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Salomone F, Sartoretti E, Ballauri S, Castellino M, Novara C, Giorgis F, Pirone R, Bensaid S. CO2 Hydrogenation to Methanol Over Zr- and Ce-doped Indium Oxide. Catal Today 2023. [DOI: 10.1016/j.cattod.2023.01.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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10
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Investigation of Cu-doped ceria through a combined spectroscopic approach: involvement of different catalytic sites in CO oxidation. Catal Today 2023. [DOI: 10.1016/j.cattod.2023.02.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
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11
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Si P, Lei J, Yang C, Zhang P, Li X, Zheng S, Li Q, Zhang J. Mesoporous Hollow Manganese Doped Ceria Nanoparticle for Effectively Prevention of Hepatic Ischemia Reperfusion Injury. Int J Nanomedicine 2023; 18:2225-2238. [PMID: 37131546 PMCID: PMC10149098 DOI: 10.2147/ijn.s400467] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 04/04/2023] [Indexed: 05/04/2023] Open
Abstract
Introduction Hepatic ischemia-reperfusion injury (HIRI) is the main reason for liver dysfunction or failure after liver resection and liver transplantation. As excess accumulation of reactive oxygen species (ROS) is the leading factor, ceria nanoparticle, a cyclic reversible antioxidant, is an excellent candidate for HIRI. Methods Manganese doped mesoporous hollow ceria nanoparticles (MnOx-CeO2 NPs) were prepared, and the physicochemical characteristics, such as particle size, morphology, microstructure, etc. were elucidated. The in vivo safety and liver targeting effect were examined after i.v. injection. The anti-HIRI was determined by a mouse HIRI model. Results MnOx-CeO2 NPs with 0.40% Mn doped exhibited the strongest ROS-scavenging capability, which may due to the increased specific surface area and surface oxygen concentration. The nanoparticles accumulated in the liver after i.v. injection and exhibited good biocompatibility. In the HIRI mice model, MnOx-CeO2 NPs significantly reduced the serum ALT and AST level, decreased the MDA level and increased the SOD level in the liver, prevent pathological damages in the liver. Conclusion MnOx-CeO2 NPs were successfully prepared and it could significantly inhibit the HIRI after i.v. injection.
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Affiliation(s)
- Peiru Si
- School of Pharmacy, Health Science Center, Xi’an Jiaotong University, Xi’an, People’s Republic of China
| | - Jiaxing Lei
- School of Pharmacy, Health Science Center, Xi’an Jiaotong University, Xi’an, People’s Republic of China
| | - Chen Yang
- School of Pharmacy, Health Science Center, Xi’an Jiaotong University, Xi’an, People’s Republic of China
| | - Peipei Zhang
- School of Pharmacy, Health Science Center, Xi’an Jiaotong University, Xi’an, People’s Republic of China
| | - Xiaojiao Li
- Biobank, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, People’s Republic of China
| | - Shaohua Zheng
- Department of Anesthesiology, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, People’s Republic of China
| | - Qingqing Li
- School of Pharmacy, Health Science Center, Xi’an Jiaotong University, Xi’an, People’s Republic of China
- Correspondence: Qingqing Li; Jiye Zhang, School of Pharmacy, Health Science Center, Xi’an Jiaotong University, No. 76 Yanta Westroad, Xi’an, People’s Republic of China, Email ;
| | - Jiye Zhang
- School of Pharmacy, Health Science Center, Xi’an Jiaotong University, Xi’an, People’s Republic of China
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12
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Gonçalves MDL, Assis PBN, da Silva AN, Bertoldo GM, Bezerra RDCF, Castro AJR, Oliveira AC, Lang R, Saraiva GD. Laser-power dependence effects on the structural stability of nanocomposite catalysts studied by Raman spectroscopy: On the structure-activity correlations in glycerol acetylation. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 280:121526. [PMID: 35753101 DOI: 10.1016/j.saa.2022.121526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 05/27/2022] [Accepted: 06/16/2022] [Indexed: 06/15/2023]
Abstract
Structural properties of binary CeAl, CeMn, NiAl, CeZr, SnTi and ZrMn nanocomposite oxide catalysts were monitored towards the Laser Raman spectroscopy investigations providing new insights to control catalytic applications upon temperature ranges at which the laser power was varied. The lattice vibrational properties were investigated by varying the incident laser power during Raman measurements from 0.017 mW to 4.0 mW. Structural changes in nanocomposites were achieved upon increasing laser power, which induced local heating disorder causing the sintering of CeMn, SnTi, and ZrMn nanocomposites. The laser-power dependence effects on the structural stability of CeAl, NiAl, and CeZr were observed with high amounts of oxygen vacancy defects over CeAl upon laser power heating. Both CeMn and ZrMn exhibited phase transitions from MnO2 to α-Mn2O3 being the use of the latter nanocomposites limited to work at 1.1 mW. The structure-activity correlations for the nanocomposite oxide catalysts were evaluated through the acetylation of glycerol with acetic acid reaction to produce valuable acetins. Remarkable shifts in the Raman bands wavenumbers and other spectral changes in the lattice mode were caused by laser-induced phenomena accounting for the undesired phase formation and particle growths, as well. This resulted in a low catalytic performance of the NiAl, SnTi, CeMn and ZrMn owing to the thermal effects. Contrary, CeAl and CeZr were more active for acetins products avoiding the phase transformations due to their structural stability at high temperatures, which in turn avoided leaching of the active Ce sites during the reaction.
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Affiliation(s)
| | - Pierre B N Assis
- Universidade Federal do Ceará, Campus Russas, Russas, Ceará, Brazil
| | | | - Gabriela M Bertoldo
- Universidade Federal do Ceará, Campus do Pici-Bloco 940, Departamento de Química Analítica e Físico-Química, Fortaleza, Ceará, Brazil
| | - Rita de Cassia F Bezerra
- Universidade Federal do Ceará, Campus do Pici-Bloco 940, Departamento de Química Analítica e Físico-Química, Fortaleza, Ceará, Brazil
| | | | - Alcineia C Oliveira
- Universidade Federal do Ceará, Campus do Pici-Bloco 940, Departamento de Química Analítica e Físico-Química, Fortaleza, Ceará, Brazil.
| | - Rossano Lang
- Instituto de Ciencia e Tecnologia-ICT, Federal Universidade of São Paulo-UNIFESP, São José dos Campos, Brazil
| | - Gilberto D Saraiva
- Faculdade de Educação Ciências e Letras do Sertão Central, Universidade Estadual do Ceará, Quixadá, Ceará, Brazil
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13
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Soto Beobide A, Moschovi AM, Mathioudakis GN, Kourtelesis M, Lada ZG, Andrikopoulos KS, Sygellou L, Dracopoulos V, Yakoumis I, Voyiatzis GA. High Catalytic Efficiency of a Nanosized Copper-Based Catalyst for Automotives: A Physicochemical Characterization. Molecules 2022; 27:7402. [PMID: 36364229 PMCID: PMC9657973 DOI: 10.3390/molecules27217402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 10/21/2022] [Accepted: 10/26/2022] [Indexed: 06/26/2024] Open
Abstract
The global trend in restrictions on pollutant emissions requires the use of catalytic converters in the automotive industry. Noble metals belonging to the platinum group metals (PGMs, platinum, palladium, and rhodium) are currently used for autocatalysts. However, recent efforts focus on the development of new catalytic converters that combine high activity and reduced cost, attracting the interest of the automotive industry. Among them, the partial substitution of PGMs by abundant non-PGMs (transition metals such as copper) seems to be a promising alternative. The PROMETHEUS catalyst (PROM100) is a polymetallic nanosized copper-based catalyst for automotives prepared by a wet impregnation method, using as a carrier an inorganic mixed oxide (CeO2-ZrO2) exhibiting elevated oxygen storage capacity. On the other hand, catalyst deactivation or ageing is defined as the process in which the structure and state of the catalyst change, leading to the loss of the catalyst's active sites with a subsequent decrease in the catalyst's performance, significantly affecting the emissions of the catalyst. The main scope of this research is to investigate in detail the effect of ageing on this low-cost, effective catalyst. To that end, a detailed characterization has been performed with a train of methods, such as SEM, Raman, XRD, XRF, BET and XPS, to both ceria-zirconia mixed inorganic oxide support (CZ-fresh and -aged) and to the copper-based catalyst (PROM100-fresh and -aged), revealing the impact of ageing on catalytic efficiency. It was found that ageing affects the Ce-Zr mixed oxide structure by initiating the formation of distinct ZrO2 and CeO2 structures monitored by Raman and XRD. In addition, it crucially affects the morphology of the sample by reducing the surface area by a factor of nearly two orders of magnitude and increasing particle size as indicated by BET and SEM due to sintering. Finally, the Pd concentration was found to be considerably reduced from the material's surface as suggested by XPS data. The above-mentioned alterations observed after ageing increased the light-off temperatures by more than 175 °C, compared to the fresh sample, without affecting the overall efficiency of the catalyst for CO and CH4 oxidation reactions. Metal particle and CeZr carrier sintering, washcoat loss as well as partial metal encapsulation by Cu and/or CeZrO4 are identified as the main causes for the deactivation after hydrothermal ageing.
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Affiliation(s)
- Amaia Soto Beobide
- Foundation for Research and Technology, Institute of Chemical Engineering Sciences FORTH/ICE-HT, 26504 Patras, Greece
| | | | - Georgios N. Mathioudakis
- Foundation for Research and Technology, Institute of Chemical Engineering Sciences FORTH/ICE-HT, 26504 Patras, Greece
| | | | - Zoi G. Lada
- Foundation for Research and Technology, Institute of Chemical Engineering Sciences FORTH/ICE-HT, 26504 Patras, Greece
| | - Konstantinos S. Andrikopoulos
- Foundation for Research and Technology, Institute of Chemical Engineering Sciences FORTH/ICE-HT, 26504 Patras, Greece
- Department of Physics, University of Patras, 26504 Patras, Greece
| | - Labrini Sygellou
- Foundation for Research and Technology, Institute of Chemical Engineering Sciences FORTH/ICE-HT, 26504 Patras, Greece
| | - Vassilios Dracopoulos
- Foundation for Research and Technology, Institute of Chemical Engineering Sciences FORTH/ICE-HT, 26504 Patras, Greece
| | | | - George A. Voyiatzis
- Foundation for Research and Technology, Institute of Chemical Engineering Sciences FORTH/ICE-HT, 26504 Patras, Greece
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Liang Q, Tang P, Zhou J, Bai J, Tian D, Zhu X, Zhou D, Wang N, Yan W. Effect of MgO and Fe2O3 dual sintering aids on the microstructure and electrochemical performance of the solid state Gd0.2Ce0.8O2-δ electrolyte in intermediate-temperature solid oxide fuel cells. Front Chem 2022; 10:991922. [PMID: 36238094 PMCID: PMC9550866 DOI: 10.3389/fchem.2022.991922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Accepted: 08/16/2022] [Indexed: 11/13/2022] Open
Abstract
Solid state electrolytes have been intensively studied in the solid oxide fuel cells (SOFCs). The aim of this work is to investigate the effects of MgO and Fe2O3 dual sintering aids on the microstructure and electrochemical properties of solid state Gd0.2Ce0.8O2-δ (GDC) electrolytes, which are prepared by a sol-gel method with MgO and Fe2O3 addition to the GDC system. It is found that the addition of MgO and Fe2O3 can reduce the sintering temperature, increase densification and decrease the grain boundary resistance of the electrolyte. The 2 mol% MgO and 2 mol% Fe2O3 co-doped GDC (GDC-MF) exhibits the highest grain boundary conductivity. At 400°C, the grain boundary conductivity and total conductivity of GDC-MF are 15.89 times and 5.56 times higher than those of GDC. The oxygen reduction reaction (ORR) rate at the electrolyte/cathode interface of GDC-MF is 47 % higher than that of GDC. Furthermore, the peak power density of a single cell supported by GDC-MF is 0.45 W cm−2 at 700°C, 36.7% higher than that of GDC. Therefore, the GDC-MF should be a promising electrolyte material for intermediate-temperature solid oxide fuel cells (IT-SOFCs).
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Affiliation(s)
- Qingwen Liang
- School of Chemistry and Life Science, Changchun University of Technology, Changchun, China
- Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Ping Tang
- School of Chemistry and Life Science, Changchun University of Technology, Changchun, China
| | - Jing Zhou
- School of Chemistry and Life Science, Changchun University of Technology, Changchun, China
| | - Jinghe Bai
- School of Chemistry and Life Science, Changchun University of Technology, Changchun, China
| | - Dan Tian
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, China
| | - Xiaofei Zhu
- School of Chemistry and Life Science, Changchun University of Technology, Changchun, China
- *Correspondence: Xiaofei Zhu, ; Defeng Zhou, ; Ning Wang,
| | - Defeng Zhou
- School of Chemistry and Life Science, Changchun University of Technology, Changchun, China
- *Correspondence: Xiaofei Zhu, ; Defeng Zhou, ; Ning Wang,
| | - Ning Wang
- Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
- Shenzhen Institute of Advanced Electronic Materials, Shenzhen, China
- *Correspondence: Xiaofei Zhu, ; Defeng Zhou, ; Ning Wang,
| | - Wenfu Yan
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, China
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15
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Lee KM, Brito M, DeCoster J, Linskens K, Mehdi K, Lee WI, Kim E, Kim H, Kwon G, Nam CY, Kim T. Influence of oxidizing and reducing pretreatment on the catalytic performance of CeO2 for CO oxidation. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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16
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Wasson MC, Wang X, Melix P, Alayoglu S, Wolek ATY, Colliard I, Son FA, Xie H, Weitz E, Islamoglu T, Nyman M, Snurr RQ, Notestein JM, Farha OK. Interfacial Unit-Dependent Catalytic Activity for CO Oxidation over Cerium Oxysulfate Cluster Assemblies. ACS APPLIED MATERIALS & INTERFACES 2022; 14:33515-33524. [PMID: 35834365 DOI: 10.1021/acsami.2c05937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Atomically precise cerium oxo clusters offer a platform to investigate structure-property relationships that are much more complex in the ill-defined bulk material cerium dioxide. We investigated the activity of the MCe70 torus family (M = Cd, Ce, Co, Cu, Fe, Ni, and Zn), a family of discrete oxysulfate-based Ce70 rings linked by monomeric cation units, for CO oxidation. CuCe70 emerged as the best performing MCe70 catalyst among those tested, prompting our exploration of the role of the interfacial unit on catalytic activity. Temperature-programmed reduction (TPR) studies of the catalysts indicated a lower temperature reduction in CuCe70 as compared to CeCe70. In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) indicated that CuCe70 exhibited a faster formation of Ce3+ and contained CO bridging sites absent in CeCe70. Isothermal CO adsorption measurements demonstrated a greater uptake of CO by CuCe70 as compared to CeCe70. The calculated energies for the formation of a single oxygen defect in the structure significantly decreased with the presence of Cu at the linkage site as opposed to Ce. This study revealed that atomic-level changes in the interfacial unit can change the reducibility, CO binding/uptake, and oxygen vacancy defect formation energetics in the MCe70 family to thus tune their catalytic activity.
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Affiliation(s)
- Megan C Wasson
- International Institute for Nanotechnology and Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Xingjie Wang
- International Institute for Nanotechnology and Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Patrick Melix
- Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnéstraße 2, 04103 Leipzig, Germany
| | - Selim Alayoglu
- Reactor Engineering and Catalyst Testing Core, Northwestern University, Evanston, Illinois 60208, United States
| | - Andrew T Y Wolek
- Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Ian Colliard
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, United States
| | - Florencia A Son
- International Institute for Nanotechnology and Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Haomiao Xie
- International Institute for Nanotechnology and Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Eric Weitz
- International Institute for Nanotechnology and Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Timur Islamoglu
- International Institute for Nanotechnology and Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - May Nyman
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, United States
| | - Randall Q Snurr
- Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Justin M Notestein
- Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Omar K Farha
- International Institute for Nanotechnology and Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
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17
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Nanostructured ceria-based catalysts doped with La and Nd: How acid-base sites and redox properties determine the oxidation mechanisms. Catal Today 2022. [DOI: 10.1016/j.cattod.2021.11.040] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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18
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Ballauri S, Sartoretti E, Novara C, Giorgis F, Piumetti M, Fino D, Russo N, Bensaid S. Wide range temperature stability of palladium on ceria-praseodymia catalysts for complete methane oxidation. Catal Today 2022. [DOI: 10.1016/j.cattod.2021.11.035] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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19
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Cerium-Copper Oxides Synthesized in a Multi-Inlet Vortex Reactor as Effective Nanocatalysts for CO and Ethene Oxidation Reactions. Catalysts 2022. [DOI: 10.3390/catal12040364] [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
In this study, a set of CuCeOx catalysts was prepared via the coprecipitation method using a Multi-Inlet Vortex Reactor: the Cu wt.% content is 5, 10, 20, 30 and 60. Moreover, pure CeO2 and CuO were synthesized for comparison purposes. The physico-chemical properties of this set of samples were investigated by complementary techniques, e.g., XRD, N2 physisorption at −196 °C, Scanning Electron Microscopy, XPS, FT-IR, Raman spectroscopy and H2-TPR. Then, the CuCeOx catalysts were tested for the CO and ethene oxidation reactions. As a whole, all the prepared samples presented good catalytic performances towards the CO oxidation reaction (1000 ppm CO, 10 vol.% O2/N2): the most promising catalyst was the 20%CuCeOx (complete CO conversion at 125 °C), which exhibited a long-term thermal stability. Similarly, the oxidative activity of the catalysts were evaluated using a gaseous mixture containing 500 ppm C2H4, 10 vol.% O2/N2. Accordingly, for the ethene oxidation reaction, the 20%CuCeOx catalyst evidenced the best catalytic properties. The elevated catalytic activity towards CO and ethene oxidation was mainly ascribed to synergistic interactions between CeO2 and CuO phases, as well as to the high amount of surface-chemisorbed oxygen species and structural defects.
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Aragão Campos PT, Oliveira CF, Vieira Lima JP, Renata de Queiroz Silva D, Loureiro Dias SC, Dias JA. Cerium–zirconium mixed oxide synthesized by sol-gel method and its effect on the oxygen vacancy and specific surface area. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2021.122752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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21
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Fan J, Sun Y, Fu M, Li J, Ye D. Modulate the metal support interactions to optimize the surface-interface features of Pt/CeO 2 catalysts for enhancing the toluene oxidation. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127505. [PMID: 34736184 DOI: 10.1016/j.jhazmat.2021.127505] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 09/27/2021] [Accepted: 10/11/2021] [Indexed: 06/13/2023]
Abstract
Metal support interactions modulation is one of the effective strategies to enhance the catalytic performance. Herein, we reported that modulating metal support interactions by switching the strength (CO, H2, NH3) and temperature (200, 300, 400 °C) of reducing gases is a facile way to improve the catalytic performance of Pt/CeO2 for toluene oxidation. The distinct reduction treatments will stepwise enhance the reducibility, ratio of Pt0 and oxygen vacancy concentration, which dominated the activity. The metal support interactions modulation can significantly affect toluene deep oxidation (from benzoate to formate or monodentate carbonate) via enhancing the mobility of surface/lattice oxygen and activation ability towards O2 molecules, since the main activation sites for O2 molecules expand from Pt0 sites to oxygen vacancies and Pt0 sites with temperature increasing.
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Affiliation(s)
- Jie Fan
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Yuhang Sun
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Mingli Fu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control (SCUT), Guangzhou 510006, China; National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangzhou 510006, China
| | - Jiaqi Li
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China.
| | - Daiqi Ye
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control (SCUT), Guangzhou 510006, China; National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangzhou 510006, China.
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22
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Effect of Ag loading on praseodymium doped ceria catalyst for soot oxidation activity. KOREAN J CHEM ENG 2022. [DOI: 10.1007/s11814-021-0933-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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23
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Lee K, Kim S, Sun S, Lee G, Kwon J, Hwang J, Seo J, Paik U, Song T. Hydrogenated ceria nanoparticles for high-efficiency silicate adsorption. NEW J CHEM 2022. [DOI: 10.1039/d2nj04043c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The enriched Ce3+ ions were confirmed on the surface of hydrogenated ceria nanoparticles which play a key role as active sites in various chemical reactions including silicate adsorption.
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Affiliation(s)
- Kangchun Lee
- Foundry Process Development Team, Semiconductor R&D Center, Samsung Electronics, Hwaseong, Korea
| | - Sungmin Kim
- Department of Energy Engineering, Hanyang University, Seoul, Korea
| | - Seho Sun
- Department of Energy Engineering, Hanyang University, Seoul, Korea
| | - Ganggyu Lee
- Department of Energy Engineering, Hanyang University, Seoul, Korea
| | - Jiseok Kwon
- Department of Energy Engineering, Hanyang University, Seoul, Korea
| | - Junha Hwang
- Department of Energy Engineering, Hanyang University, Seoul, Korea
- Material R&D Center, KCTech, Hwaseong, Korea
| | - Jihoon Seo
- Department of Chemical and Biomolecular Engineering, Clarkson University, New York, USA
| | - Ungyu Paik
- Department of Energy Engineering, Hanyang University, Seoul, Korea
| | - Taeseup Song
- Department of Energy Engineering, Hanyang University, Seoul, Korea
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Ganiger S, Patil SS, Dasari HP, Priyanka R, Kollimarla S. Printex-U soot oxidation kinetic behaviour over Alumina and Quartz. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2021.117016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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25
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Zheng X, S Mofarah S, Cen A, Cazorla C, Haque E, Chen EY, Atanacio AJ, Manohar M, Vutukuri C, Abraham JL, Koshy P, Sorrell CC. Role of Oxygen Vacancy Ordering and Channel Formation in Tuning Intercalation Pseudocapacitance in Mo Single-Ion-Implanted CeO 2-x Nanoflakes. ACS APPLIED MATERIALS & INTERFACES 2021; 13:59820-59833. [PMID: 34875170 DOI: 10.1021/acsami.1c14484] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Metal oxide pseudocapacitors are limited by low electrical and ionic conductivities. The present work integrates defect engineering and architectural design to exhibit, for the first time, intercalation pseudocapacitance in CeO2-x. An engineered chronoamperometric electrochemical deposition is used to synthesize 2D CeO2-x nanoflakes as thin as ∼12 nm. Through simultaneous regulation of intrinsic and extrinsic defect concentrations, charge transfer and charge-discharge kinetics with redox and intercalation capacitances together are optimized, where reduction increases the gravimetric capacitance by 77% to 583 F g-1, exceeding the theoretical capacitance (562 F g-1). Mo ion implantation and reduction processes increase the specific capacitance by 133%, while the capacitance retention increases from 89 to 95%. The role of ion-implanted Mo6+ is critical through its interstitial solid solubility, which is not to alter the energy band diagram but to facilitate the generation of electrons and to establish the midgap states for color centers, which facilitate electron transfer across the band gap, thus enhancing n-type semiconductivity. Critically, density functional theory simulations reveal, for the first time, that the reduction causes the formation of ordered oxygen vacancies that provide an atomic channel for ion intercalation. These channels enable intercalation pseudocapacitance but also increase electrical and ionic conductivities. In addition, the associated increased active site density enhances the redox such that the 10% of the Ce3+ available for redox (surface only) increases to 35% by oxygen vacancy channels. These findings are critical for any oxide system used for energy storage systems, as they offer both architectural design and structural engineering of materials to maximize the capacitance performance by achieving accumulative surface redox and intercalation-based redox reactions during the charge/discharge process.
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Affiliation(s)
- Xiaoran Zheng
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Sajjad S Mofarah
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Alan Cen
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Claudio Cazorla
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Enamul Haque
- EH Solid State Physics Laboratory, Gaffargaon, Mymensingh 2233, Bangladesh
| | - Ewing Y Chen
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Armand J Atanacio
- Centre for Accelerator Science, Australian Nuclear Science and Technology Organisation, New Illawarra Road, Lucas Heights, New South Wales 2234, Australia
| | - Madhura Manohar
- Centre for Accelerator Science, Australian Nuclear Science and Technology Organisation, New Illawarra Road, Lucas Heights, New South Wales 2234, Australia
| | - Corey Vutukuri
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Joel Luke Abraham
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Pramod Koshy
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Charles C Sorrell
- School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
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26
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Adak S, Pal RS, Khan TS, Poddar MK, Ahmad MS, Prasad VVDN, Haider MA, Bal R. Role of Interfacial Cu‐Ions in Polycrystalline Cu‐CeO
2
: In‐Situ Raman, In‐situ DRIFT and DFT Studies for Preferential Oxidation of CO in Presence of Excess H
2
**. ChemistrySelect 2021. [DOI: 10.1002/slct.202102859] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shubhadeep Adak
- Light Stock Processing Division CSIR-Indian Institute of Petroleum Dehradun 248005 India
- Academy of Scientific and Innovative Research Ghaziabad Uttar Pradesh 201002 India
| | - Rohan Singh Pal
- Light Stock Processing Division CSIR-Indian Institute of Petroleum Dehradun 248005 India
- Academy of Scientific and Innovative Research Ghaziabad Uttar Pradesh 201002 India
| | - Tuhin Suvra Khan
- Light Stock Processing Division CSIR-Indian Institute of Petroleum Dehradun 248005 India
- Academy of Scientific and Innovative Research Ghaziabad Uttar Pradesh 201002 India
| | - Mukesh Kumar Poddar
- Light Stock Processing Division CSIR-Indian Institute of Petroleum Dehradun 248005 India
| | - Md. Sarfaraz Ahmad
- Light Stock Processing Division CSIR-Indian Institute of Petroleum Dehradun 248005 India
| | - Vemulapalli V. D. N. Prasad
- Light Stock Processing Division CSIR-Indian Institute of Petroleum Dehradun 248005 India
- Academy of Scientific and Innovative Research Ghaziabad Uttar Pradesh 201002 India
| | - Mohammad Ali Haider
- Renewable Energy and Chemicals Laboratory Department of Chemical Engineering Indian Institute of Technology Delhi, Hauz Khas Delhi 110016 India
| | - Rajaram Bal
- Light Stock Processing Division CSIR-Indian Institute of Petroleum Dehradun 248005 India
- Academy of Scientific and Innovative Research Ghaziabad Uttar Pradesh 201002 India
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27
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Sun J, Yamaguchi D, Tang L, Periasamy S, Ma H, Hart JN, Chiang K. Enhancement of oxygen exchanging capability by loading a small amount of ruthenium over ceria-zirconia on dry reforming of methane. ADV POWDER TECHNOL 2021. [DOI: 10.1016/j.apt.2021.103407] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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28
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Divya T, Anjali C, Sunajadevi K, Anas K, Renuka N. Influence of hydrothermal synthesis conditions on lattice defects in cerium oxide. J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2021.122253] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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29
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Ho PH, Sanghez de Luna G, Poggi A, Nota M, Rodríguez-Castellón E, Fornasari G, Vaccari A, Benito P. Ru–CeO 2 and Ni–CeO 2 Coated on Open-Cell Metallic Foams by Electrodeposition for the CO 2 Methanation. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.0c06024] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Phuoc Hoang Ho
- Dipartimento di Chimica Industriale “Toso Montanari”, University of Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
| | - Giancosimo Sanghez de Luna
- Dipartimento di Chimica Industriale “Toso Montanari”, University of Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
| | - Arturo Poggi
- Dipartimento di Chimica Industriale “Toso Montanari”, University of Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
| | - Monica Nota
- Dipartimento di Chimica Industriale “Toso Montanari”, University of Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
| | | | - Giuseppe Fornasari
- Dipartimento di Chimica Industriale “Toso Montanari”, University of Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
| | - Angelo Vaccari
- Dipartimento di Chimica Industriale “Toso Montanari”, University of Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
| | - Patricia Benito
- Dipartimento di Chimica Industriale “Toso Montanari”, University of Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
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30
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Zhang ZT, Yang QQ, Zhen XJ, Feng ZZ, Zhai XP, Zhang XD, Huang YF, Wang Q, Zhang HL. Two-Dimensional Bismuthene Showing Radiation-Tolerant Third-Order Optical Nonlinearities. ACS APPLIED MATERIALS & INTERFACES 2021; 13:21626-21634. [PMID: 33904717 DOI: 10.1021/acsami.1c03042] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The ever-increasing space exploration enterprise calls for novel and high-quality radiation-resistant materials, among which nonlinear optical materials and devices are particularly scarce. Two-dimensional (2D) materials have shown promising potential, but the radiation effects on their nonlinear optical properties remain largely elusive. We previously fabricated 2D bismuthene for mode-locking sub-ns laser; herein, their space adaption was evaluated under a simulated space radiation environment. The as-synthesized thin layers of bismuthene exhibited strong third-order nonlinear optical responses extending into the near-infrared region. Remarkably, when exposed to 60Co γ-rays and electron irradiation, the bismuthene showed only slight degradation in saturable absorption behaviors that were critical for mode-locking in space. Ultrafast spectroscopy was applied to address the radiation effects and damage mechanisms that are difficult to understand by routine techniques. This work offers a new bottom-up approach for preparing 2D bismuthene, and the elucidation of its fundamental excited-state dynamics after radiation also provides a guideline to optimize the material for eventual space applications.
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Affiliation(s)
- Zheng-Tao Zhang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Qi-Qi Yang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Xiao-Juan Zhen
- School of Electronic and Information Engineering, Lanzhou City University, Lanzhou 730000, China
| | - Zhan-Zu Feng
- Science and Technology on Material Performance Evaluating in Space Environment Laboratory, Lanzhou Institute of Physics, Lanzhou 730000, China
| | - Xin-Ping Zhai
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Xiao-Dong Zhang
- National Key Laboratory of Materials Behavior and Evaluation Technology in Space Environment, Harbin Institute of Technology, Harbin 150001, China
| | - Yi-Fan Huang
- School of Electronic and Information Engineering, Lanzhou City University, Lanzhou 730000, China
| | - Qiang Wang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
| | - Hao-Li Zhang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China
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31
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Photocatalytic Activity of Cellulose Acetate Nanoceria/Pt Hybrid Mats Driven by Visible Light Irradiation. Polymers (Basel) 2021; 13:polym13060912. [PMID: 33809649 PMCID: PMC8002269 DOI: 10.3390/polym13060912] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 03/10/2021] [Accepted: 03/11/2021] [Indexed: 12/27/2022] Open
Abstract
A photocatalytic system for the degradation of aqueous organic pollutants under visible light irradiation is obtained by an innovative approach based on ceria/platinum (Pt) hybrid nanoclusters on cellulose acetate fibrous membranes. The catalytic materials are fabricated by supersonic beam deposition of Pt nanoclusters directly on the surface of electrospun cellulose acetate fibrous mats, pre-loaded with a cerium salt precursor that is transformed into ceria nanoparticles directly in the solid mats by a simple thermal treatment. The presence of Pt enhances the oxygen vacancies on the surface of the formed ceria nanoparticles and reduces their band gap, resulting in a significant improvement of the photocatalytic performance of the composite mats under visible light irradiation. Upon the appropriate pretreatment and visible light irradiation, we prove that the most efficient mats, with both ceria nanoparticles and Pt nanoclusters, present a degradation efficiency of methylene blue of 70% and a photodegradation rate improved by about five times compared to the ceria loaded samples, without Pt. The present results bring a significant improvement of the photocatalytic performance of polymeric nanocomposite fibrous systems under visible light irradiation, for efficient wastewater treatment applications.
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32
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Hess C. New advances in using Raman spectroscopy for the characterization of catalysts and catalytic reactions. Chem Soc Rev 2021; 50:3519-3564. [PMID: 33501926 DOI: 10.1039/d0cs01059f] [Citation(s) in RCA: 76] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Gaining insight into the mode of operation of heterogeneous catalysts is of great scientific and economic interest. Raman spectroscopy has proven its potential as a powerful vibrational spectroscopic technique for a fundamental and molecular-level characterization of catalysts and catalytic reactions. Raman spectra provide important insight into reaction mechanisms by revealing specific information on the catalysts' (defect) structure in the bulk and at the surface, as well as the presence of adsorbates and reaction intermediates. Modern Raman instrumentation based on single-stage spectrometers allows high throughput and versatility in design of in situ/operando cells to study working catalysts. This review highlights major advances in the use of Raman spectroscopy for the characterization of heterogeneous catalysts made during the past decade, including the development of new methods and potential directions of research for applying Raman spectroscopy to working catalysts. The main focus will be on gas-solid catalytic reactions, but (photo)catalytic reactions in the liquid phase will be touched on if it appears appropriate. The discussion begins with the main instrumentation now available for applying vibrational Raman spectroscopy to catalysis research, including in situ/operando cells for studying gas-solid catalytic processes. The focus then moves to the different types of information available from Raman spectra in the bulk and on the surface of solid catalysts, including adsorbates and surface depositions, as well as the use of theoretical calculations to facilitate band assignments and to describe (resonance) Raman effects. This is followed by a presentation of major developments in enhancing the Raman signal of heterogeneous catalysts by use of UV resonance Raman spectroscopy, surface-enhanced Raman spectroscopy (SERS), and shell-isolated nanoparticle surface-enhanced Raman spectroscopy (SHINERS). The application of time-resolved Raman studies to structural and kinetic characterization is then discussed. Finally, recent developments in spatially resolved Raman analysis of catalysts and catalytic processes are presented, including the use of coherent anti-Stokes Raman spectroscopy (CARS) and tip-enhanced Raman spectroscopy (TERS). The review concludes with an outlook on potential future developments and applications of Raman spectroscopy in heterogeneous catalysis.
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Affiliation(s)
- Christian Hess
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Str. 8, 64287, Darmstadt, Germany.
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33
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Kim HJ, Shin D, Jeong H, Jang MG, Lee H, Han JW. Design of an Ultrastable and Highly Active Ceria Catalyst for CO Oxidation by Rare-Earth- and Transition-Metal Co-Doping. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03386] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Hyung Jun Kim
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk 37673, Republic of Korea
| | - Dongjae Shin
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk 37673, Republic of Korea
| | - Hojin Jeong
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Myeong Gon Jang
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk 37673, Republic of Korea
| | - Hyunjoo Lee
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Jeong Woo Han
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk 37673, Republic of Korea
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34
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Midouni A, Chaouachi A, Ben Haj Othmen W, Hosni F, Yahya M, Hichem Hamzaoui A. New Approach to Improve Ionic Conductivity at Low Temperature by the Decomposition of KHCO
3
in the Nanocomposite Electrolyte @. ChemistrySelect 2020. [DOI: 10.1002/slct.202002770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Adnene Midouni
- Useful Materials Valorization Laboratory National Centre of Research in Materials Science, Technologic Park of Borj Cedria, B.P. 73 8027 Soliman Tunisia
| | - Anis Chaouachi
- Useful Materials Valorization Laboratory National Centre of Research in Materials Science, Technologic Park of Borj Cedria, B.P. 73 8027 Soliman Tunisia
| | - Walid Ben Haj Othmen
- Laboratoire de Caractérisations Applications et Modélisation des Matériaux LR18ES08, Sciences Faculty of Tunis, University of Tunis El Manar, 2092 El Manar Tunisia
| | - Faouzi Hosni
- University of Bisha Faculty of Sciences Bisha Saudi Arabia Adnene MIDOUNI
| | - Mondher Yahya
- Useful Materials Valorization Laboratory National Centre of Research in Materials Science, Technologic Park of Borj Cedria, B.P. 73 8027 Soliman Tunisia
| | - Ahmed Hichem Hamzaoui
- Useful Materials Valorization Laboratory National Centre of Research in Materials Science, Technologic Park of Borj Cedria, B.P. 73 8027 Soliman Tunisia
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35
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Wojtasik M, Żak G, Markowski J. Dispersants’ influence on the effectiveness of oxidation of soot catalysed with liquid dispersions of iron nano-compounds. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124871] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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36
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Sorolla‐Rosario D, Davó‐Quiñonero A, Bailón‐García E, Lozano‐Castelló D, Bueno‐López A. Key‐lock Ceria Catalysts for the Control of Diesel Engine Soot Particulate Emissions. ChemCatChem 2020. [DOI: 10.1002/cctc.201902177] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Débora Sorolla‐Rosario
- Department of Inorganic ChemistryUniversity of Alicante Carretera de San Vicente s/n Alicante E03080 Spain
| | - Arantxa Davó‐Quiñonero
- Department of Inorganic ChemistryUniversity of Alicante Carretera de San Vicente s/n Alicante E03080 Spain
| | - Esther Bailón‐García
- Department of Inorganic ChemistryUniversity of Alicante Carretera de San Vicente s/n Alicante E03080 Spain
| | - Dolores Lozano‐Castelló
- Department of Inorganic ChemistryUniversity of Alicante Carretera de San Vicente s/n Alicante E03080 Spain
| | - Agustín Bueno‐López
- Department of Inorganic ChemistryUniversity of Alicante Carretera de San Vicente s/n Alicante E03080 Spain
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37
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Influence of the Preparation Method of Ag-K/CeO2-ZrO2-Al2O3 Catalysts on Their Structure and Activity for the Simultaneous Removal of Soot and NOx. Catalysts 2020. [DOI: 10.3390/catal10030294] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Ag/CeO2-ZrO2-Al2O3, a known catalyst for the simultaneous removal of NOx and soot, was modified by the addition of K, and was prepared using various techniques: wet impregnation, incipient wetness, and chemical vapor impregnation at different temperatures. The effect of the preparation method on catalyst activity was studied. It was found that catalysts prepared via wet impregnation, incipient wetness, and chemical vapor impregnation at 80 °C were able to utilize in situ formed N2O at low temperatures, to simultaneously remove NOx and soot. The difference in preparation method affected the catalyst’s ability to produce and use N2O as an oxidant for soot. The temperature at which chemical vapor impregnation was performed greatly influenced the catalyst’s ability to oxidize soot. The introduction of K to the Ag/CeO2-ZrO2-Al2O3 vastly improved the soot oxidation activity, particularly for the catalyst prepared via wet impregnation. However, the incorporation of K had an adverse effect on the reduction of NOx.
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38
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Abstract
A Gasoline Particulate Filter (GPF) can be an effective solution to abate the particulate matter produced in modern direct injection gasoline engines. The regeneration of this system is critical, since it occurs in oxygen deficiency, but it can be promoted by placing an appropriate catalyst on the filter walls. In this paper, a nanostructured equimolar ceria-praseodymia catalyst, obtained via hydrothermal synthesis, was characterized with complementary techniques (XRD, N2-physisorption, FESEM, XPS, Temperature Programmed Reduction, etc.) and its catalytic performances were investigated in low oxygen availability. Pr-doping significantly affected ceria structure and morphology, and the weakening of the cerium–oxygen bond associated to Pr insertion resulted in a high reducibility. The catalytic activity was explored considering different reactions, namely CO oxidation, ethylene and propylene total oxidation, and soot combustion. Thanks to its capability of releasing active oxygen species, ceria-praseodymia exhibited a remarkable activity and CO2-selectivity at low oxygen concentrations, proving to be a promising catalyst for coated GPFs.
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39
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Mori K, Jida H, Kuwahara Y, Yamashita H. CoO x-decorated CeO 2 heterostructures: effects of morphology on their catalytic properties in diesel soot combustion. NANOSCALE 2020; 12:1779-1789. [PMID: 31895367 DOI: 10.1039/c9nr08899g] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The effect of the morphology, which exposes different crystal planes, on the physicochemical properties and catalytic activity in diesel carbon soot oxidation was studied using CoOx-decorated CeO2 (CoCeO2) heterostructured catalysts, such as nanorods (NRs), nanocubes (NCs), and nanoparticles (NPs). The CoOx/CeO2 nanorods (CoCeO2-NR) showed superior carbon soot combustion activity at lower temperatures to CoCeO2-NCs and CoCeO2-NPs under both tight and loose contact modes with soot combustion temperatures (T50) of 321 and 494 °C, respectively. A comprehensive analysis by means of X-ray diffraction, Raman spectroscopy, high-angle annular dark-field scanning transmission electron microscopy, in situ X-ray absorption fine structure, temperature-programmed reduction, oxygen storage/release measurements, and density functional theory calculations revealed that the improved activity of CoCeO2-NRs is mainly ascribed to the high oxygen release rate and strong redox capability of the supported Co species, with complete reversibility. This originates from the high reactivity of oxygen atoms on (110) surfaces, compared to (100) and (111) surfaces over CeO2. Additionally, CoCeO2-NRs displayed durability and recyclability without any significant loss of catalytic activity or structural change. These insights will aid in the rational design of practical catalysts for the purification of diesel exhaust and other important transformations.
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Affiliation(s)
- Kohsuke Mori
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan.
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40
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Ashikaga R, Murata K, Ito T, Yamamoto Y, Arai S, Satsuma A. Tuning the oxygen release properties of CeO 2-based catalysts by metal–support interactions for improved gasoline soot combustion. Catal Sci Technol 2020. [DOI: 10.1039/d0cy01294g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
CeO2-supported Cu and Rh catalysts showed high soot combustion activities by their high oxygen release properties depending on moderate metal–oxygen bond energy.
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Affiliation(s)
- Ryota Ashikaga
- Graduate School of Engineering
- Nagoya University
- Nagoya 464-8603
- Japan
| | - Kazumasa Murata
- Graduate School of Engineering
- Nagoya University
- Nagoya 464-8603
- Japan
| | - Tetsuya Ito
- Graduate School of Engineering
- Nagoya University
- Nagoya 464-8603
- Japan
| | - Yuta Yamamoto
- Institute of Materials and Systems for Sustainability
- Nagoya University
- Nagoya 464-8603
- Japan
| | - Shigeo Arai
- Institute of Materials and Systems for Sustainability
- Nagoya University
- Nagoya 464-8603
- Japan
| | - Atsushi Satsuma
- Graduate School of Engineering
- Nagoya University
- Nagoya 464-8603
- Japan
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