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Hashimoto N, Mori K, Matsuzaki S, Iwama K, Kitaura R, Kamiuchi N, Yoshida H, Yamashita H. Sub-nanometric High-Entropy Alloy Cluster: Hydrogen Spillover Driven Synthesis on CeO 2 and Structural Reversibility. JACS AU 2023; 3:2131-2143. [PMID: 37654591 PMCID: PMC10466320 DOI: 10.1021/jacsau.3c00210] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Revised: 07/05/2023] [Accepted: 07/06/2023] [Indexed: 09/02/2023]
Abstract
High-entropy alloy (HEA) nanoparticles (NPs) have attracted significant attention as promising catalysts owing to the various unique synergistic effects originating from the nanometer-scale, near-equimolar mixing of five or more components to produce single-phase solid solutions. However, the study of sub-nanometer HEA clusters having sizes of less than 1 nm remains incomplete despite the possibility of novel functions related to borderline molecular states with discrete quantum energy levels. The present work demonstrates the synthesis of CeO2 nanorods (CeO2-NRs) on which sub-nanometer CoNiCuZnPd HEA clusters were formed with the aid of a pronounced hydrogen spillover effect on readily reducible CeO2 (110) facets. The CoNiCuZnPd HEA sub-nanoclusters exhibited higher activity during the reduction of NO by H2 even at low temperatures compared with the corresponding monometallic catalysts. These clusters also showed a unique structural reversibility in response to repeated exposure to oxidative/reductive conditions, based on the sacrificial oxidation of the non-noble metals. Both experimental and theoretical analyses established that multielement mixing in quantum-sized regions endowed the HEA clusters with entirely novel catalytic properties.
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Affiliation(s)
- Naoki Hashimoto
- Division
of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Kohsuke Mori
- Division
of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
- Innovative
Catalysis Science Division, Institute for Open and Transdisciplinary
Research Initiatives (ICS-OTRI), Osaka University, Suita, Osaka 565-0871, Japan
| | - Shuichiro Matsuzaki
- Division
of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Kazuki Iwama
- Division
of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Ryota Kitaura
- Division
of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Naoto Kamiuchi
- The
Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Hideto Yoshida
- The
Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Hiromi Yamashita
- Division
of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
- Innovative
Catalysis Science Division, Institute for Open and Transdisciplinary
Research Initiatives (ICS-OTRI), Osaka University, Suita, Osaka 565-0871, Japan
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Lou D, Xiang B, Zhang Y, Fang L, Tan P, Hu Z. Study on the Catalytic Characteristics of Precious Metal Catalysts with Different Pt/Pd Ratios for Soot Combustion. ACS OMEGA 2023; 8:20834-20844. [PMID: 37332786 PMCID: PMC10268644 DOI: 10.1021/acsomega.3c01543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 05/22/2023] [Indexed: 06/20/2023]
Abstract
Soot particles in engine exhaust seriously pollute the atmosphere and endanger human health. For soot oxidation, Pt and Pd precious metal catalysts are widely used and are effective. In this paper, the catalytic characteristics of catalysts with different Pt/Pd mass ratios for soot combustion were studied through X-ray diffraction, X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller analysis, scanning electron microscopy, transmission electron microscopy, the temperature-programmed oxidation reaction, and thermogravimetry. Besides, the adsorption characteristics of soot and O2 on the catalyst surface were explored by density functional theory (DFT) calculations. The research results showed that the activity of catalysts for soot oxidation from strong to weak is Pt/Pd = 10:1, Pt/Pd = 5:1, Pt/Pd = 1:0, and Pt/Pd = 1:1. XPS results showed that the concentration of oxygen vacancies in the catalyst is the highest when the Pt/Pd ratio is 10:1. The specific surface area of the catalyst increases first and then decreases with the increase of Pd content. When the Pt/Pd ratio is 10:1, the specific surface area and pore volume of the catalyst reach the maximum. The following are the DFT calculation results. With the increase of Pd content, the adsorption energy of particles on the catalyst surface decreases first and then increases. When the Pt/Pd ratio is 10:1, the adsorption of C on the catalyst surface is the strongest, and the adsorption of O2 is also strong. In addition, this surface has a strong ability to donate electrons. The theoretical simulation results are consistent with the activity test results. The research results have a guiding significance for optimizing the Pt/Pd ratio and improving the soot oxidation performance of the catalyst.
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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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Electrochemical Ce(III)/Ce(IV) interconversion, electrodeposition, and catalytic CO ↔ CO2 interconversion over terpyridine-modified indium tin oxide electrodes. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2021.11.029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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5
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Dai H, Zhang A, Xiong S, Xiao X, Zhou C, Pan Y. The catalytic performance of Ga2O3‐CeO2 composite oxides over reverse water gas shift reaction. ChemCatChem 2022. [DOI: 10.1002/cctc.202200049] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hui Dai
- Chengdu University of Technology College of Materials and Chemistry & Chemical Engineering Chenghua District, 610059 Chengdu CHINA
| | - Anhang Zhang
- Chengdu University of Technology College of Materials and Chemistry & Chemical Engineering CHINA
| | - Siqi Xiong
- Chengdu University of Technology College of Materials and Chemistry & Chemical Engineering CHINA
| | - Xin Xiao
- Sichuan University Department of Chemical Engineering CHINA
| | - Changjian Zhou
- Yancheng Institute of Technology School of Chemistry and Chemical Engineering CHINA
| | - Yi Pan
- National Institute of Measurement and Testing Technology Chemistry Research Division CHINA
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6
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Xiao R, Zhang Y, Wang S, Zhu H, Song H, Chen G, Lin H, Zhang J, Xiong J. Prussian blue modified CeO 2 as a heterogeneous photo-Fenton-like catalyst for degradation of norfloxacin in water. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:69301-69313. [PMID: 34296409 DOI: 10.1007/s11356-021-15498-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 07/14/2021] [Indexed: 06/13/2023]
Abstract
The heterogeneous photo-Fenton-like process is emerging as a promising treatment of antibiotics-containing wastewater. The preparation of new efficient and stable catalysts is one of the research fields. A composite catalyst, prussian blue (PB) modified CeO2 was prepared, characterized, and applied for photo-Fenton oxidation of norfloxacin (NOR) in this study. It was found that chemical doping of PB leaded to more oxygen vacancies and increased the surface area of CeO2 obviously. PB/CeO2 with more Ce3+ facilitated electron transfer between Fe3+/Fe2+ with Ce3+/Ce4+. PB could also improve the separation rate of photoexcited electron-hole pairs in CeO2 nanostructures. When the doping ratio of PB and CeO2 was 10%, PB/CeO2 show the highest catalytic degradation ability and 88.93% of NOR could be degraded within 30 min. PB/CeO2 composite showed well reactivity at the wide pH value range of 3-8. The reusable experiments and low iron dissolution with less than 1 mg/L indicated that PB/CeO2 could be employed as an efficient heterogeneous photo-Fenton-like catalyst in organic contaminants degradation.
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Affiliation(s)
- Ruyi Xiao
- Guangxi University, Nanning, 530004, China
| | | | - Shuangfei Wang
- Guangxi University, Nanning, 530004, China.
- Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning, 530004, China.
| | - Hongxiang Zhu
- Guangxi University, Nanning, 530004, China
- Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning, 530004, China
| | - Hainong Song
- Guangxi BOSSCO Environmental Protection Science and Technology Co., LTD., Nanning, 530004, China
| | - Guoning Chen
- Guangxi BOSSCO Environmental Protection Science and Technology Co., LTD., Nanning, 530004, China
| | - Hongfei Lin
- Guangxi BOSSCO Environmental Protection Science and Technology Co., LTD., Nanning, 530004, China
| | - Jian Zhang
- Guangxi University, Nanning, 530004, China
- Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning, 530004, China
| | - Jianhua Xiong
- Guangxi University, Nanning, 530004, China
- Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning, 530004, China
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7
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Miran HA, Jaf ZN, Altarawneh M, Jiang ZT. An Insight into Geometries and Catalytic Applications of CeO 2 from a DFT Outlook. Molecules 2021; 26:6485. [PMID: 34770889 PMCID: PMC8588098 DOI: 10.3390/molecules26216485] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 10/19/2021] [Accepted: 10/21/2021] [Indexed: 11/18/2022] Open
Abstract
Rare earth metal oxides (REMOs) have gained considerable attention in recent years owing to their distinctive properties and potential applications in electronic devices and catalysts. Particularly, cerium dioxide (CeO2), also known as ceria, has emerged as an interesting material in a wide variety of industrial, technological, and medical applications. Ceria can be synthesized with various morphologies, including rods, cubes, wires, tubes, and spheres. This comprehensive review offers valuable perceptions into the crystal structure, fundamental properties, and reaction mechanisms that govern the well-established surface-assisted reactions over ceria. The activity, selectivity, and stability of ceria, either as a stand-alone catalyst or as supports for other metals, are frequently ascribed to its strong interactions with the adsorbates and its facile redox cycle. Doping of ceria with transition metals is a common strategy to modify the characteristics and to fine-tune its reactive properties. DFT-derived chemical mechanisms are surveyed and presented in light of pertinent experimental findings. Finally, the effect of surface termination on catalysis by ceria is also highlighted.
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Affiliation(s)
- Hussein A. Miran
- Department of Physics, College of Education for Pure Science, Ibn Al-Haitham, University of Baghdad, Baghdad 10071, Iraq;
| | - Zainab N. Jaf
- Department of Physics, College of Education for Pure Science, Ibn Al-Haitham, University of Baghdad, Baghdad 10071, Iraq;
| | - Mohammednoor Altarawneh
- Department of Chemical and Petroleum Engineering, United Arab Emirates University, Sheikh Khalifa Bin Zayed Street, Al-Ain 15551, United Arab Emirates
| | - Zhong-Tao Jiang
- Surface Analysis and Materials Engineering Research Group, College of Science, Health, Engineering and Education, Murdoch University, Murdoch, WA 6150, Australia;
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9
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Optimal exposed crystal facets of α-Mn2O3 catalysts with enhancing catalytic performance for soot combustion. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.05.039] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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10
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Zhang P, Mei X, Zhao X, Xiong J, Li Y, Zhao Z, Wei Y. Boosting Catalytic Purification of Soot Particles over Double Perovskite-Type La 2-xK xNiCoO 6 Catalysts with an Ordered Macroporous Structure. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:11245-11254. [PMID: 34339174 DOI: 10.1021/acs.est.1c01781] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The catalytic performances for soot purification over the perovskite-type ABO3 oxides, as one of the most potential non-noble metal catalysts, are closely correlated with the substitution of A-site and B-site ions. Herein, three-dimensional ordered macroporous (3DOM) structural catalysts of double perovskite-type La2-xKxNiCoO6 were prepared by a method of colloidal crystal template. The contact efficiency between the catalyst and soot particles is significantly promoted by the 3DOM structure, and the partial substitution of A-site (La) with low-valence potassium (K) ions in La2-xKxNiCoO6 catalysts boosts the increasing surface density of coordinatively unsaturated active B-sites (Co and Ni) and active oxygen. 3DOM La2-xKxNiCoO6 catalysts exhibited superior performance during the purification of soot particles, and the 3DOM La1.80K0.20NiCoO6 catalyst exhibited the highest activity, that is, the values of T50, SCO2, and turnover frequency are 346 °C, 99.3%, and 0.204 h-1 (at 300 °C), respectively. According to the results of multiple experimental characterizations and density functional theory calculations, the mechanism of the samples during soot removal is proposed: the increase in surface oxygen density induced by the doping of K ions significantly promotes the critical step of the oxidation from NO to NO2 in catalyzing soot purification. It is one new strategy to develop the high-efficient non-noble metal catalysts for soot purification in practical application.
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Affiliation(s)
- Peng Zhang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Xuelei Mei
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Xiaochan Zhao
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Jing Xiong
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
- Key Laboratory of Optical Detection Technology for Oil and Gas, China University of Petroleum, Beijing 102249, P. R. China
| | - Yuanfeng Li
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Zhen Zhao
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Yuechang Wei
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
- Key Laboratory of Optical Detection Technology for Oil and Gas, China University of Petroleum, Beijing 102249, P. R. China
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11
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Park SJ, Joo MH, Yang JH, Hong SM, Rhee CK, Kang JG, Sohn Y. Electrochemical Ce(III)/Ce(IV) Redox Behavior and Ce Oxide Nanostructure Recovery over Thio-Terpyridine-Functionalized Au/Carbon Paper Electrodes. ACS APPLIED MATERIALS & INTERFACES 2021; 13:27594-27611. [PMID: 34080410 DOI: 10.1021/acsami.1c05105] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Understanding the electrochemical behaviors of Ce(III)/Ce(IV) ions is essential for better treatment, separation, and recycling of lanthanide (Ln) and actinide (An) elements. Herein, electrochemical redox behavior and interconversion of Ce(III)/Ce(IV) ions and their recoveries were demonstrated over newly developed thio-terpyridine-functionalized Au-modified carbon paper electrodes in acidic and neutral electrolytes. Cyclic voltammetry and amperometry were performed for the electrodes with and without thio-terpyridine functionalization. Ce oxide nanostructure recovery was successfully conducted by amperometry, and the electrodeposited nanostructured Ce materials were fully characterized by scanning electron microscopy, high-resolution transmission electron microscopy, X-ray diffraction crystallography, and X-ray photoelectron spectroscopy. Geometry optimization and the electronic energy state calculations were conducted by density functional theory at the B3LYP/GENECP level for the complexes of Ce(III) and Ce(IV) ions with the thio-terpyridine in an aqueous state. The present unique results provide valuable information on understanding redox behaviors of Ln and An ions for their recycling and treatment processes.
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Affiliation(s)
- So Jeong Park
- Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Min Hee Joo
- Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
- Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Ju Hyun Yang
- Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
- Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Sung-Min Hong
- Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
- Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Choong Kyun Rhee
- Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Jun-Gill Kang
- IDK, #306 IT Venture Town, Techno 9-Ro, Yuseong, Daejeon 34839, Republic of Korea
| | - Youngku Sohn
- Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
- Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
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12
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Zhang P, Xiong J, Wei Y, Li Y, Zhang Y, Tang J, Song W, Zhao Z, Liu J. Exposed {0 0 1} facet of anatase TiO2 nanocrystals in Ag/TiO2 catalysts for boosting catalytic soot combustion: The facet-dependent activity. J Catal 2021. [DOI: 10.1016/j.jcat.2021.04.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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13
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Hashimoto N, Mori K, Asahara K, Shibata S, Jida H, Kuwahara Y, Yamashita H. How the Morphology of NiO x-Decorated CeO 2 Nanostructures Affects Catalytic Properties in CO 2 Methanation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:5376-5384. [PMID: 33881888 DOI: 10.1021/acs.langmuir.1c00546] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Effects of morphology and exposed crystal planes of NiOx-decorated CeO2 (NiCeO2) nanostructured catalysts on activity during CO2 methanation were examined, using nanorod (NR), nanocube (NC), and nanooctahedron (NO) structures. The NiCeO2 nanorods (NiCeO2-NR) showed superior activity to NiCeO2-NC and NiCeO2-NO along with excellent selectivity for CH4. This material also demonstrated exceptional durability, with no significant loss of catalytic activity or structural change after use. Comprehensive physicochemical characterization as well as density functional theory calculations determined that the high performance of the NiCeO2-NR was closely related to the large quantity of surface oxygen vacancies and the high degree of reversibility associated with the Ce4+ ↔ Ce3+ redox cycle of the support. These effects originate from the enhanced reactivity of oxygen atoms on the (110) surfaces of the oxide compared with the (100) and (111) surfaces. This information is expected to assist in the rational design of practical catalysts for the activation of CO2 molecules and other important transformations.
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Affiliation(s)
- Naoki Hashimoto
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Kohsuke Mori
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Katsura, Kyoto 615-8520, Japan
- Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University, Suita, Osaka 565-0871, Japan
| | - Kohei Asahara
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Shun Shibata
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Hirotaka Jida
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Yasutaka Kuwahara
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Katsura, Kyoto 615-8520, Japan
- Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University, Suita, Osaka 565-0871, Japan
- JST, PRESTO, Kawaguchi, Saitama 332-0012, Japan
| | - Hiromi Yamashita
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Katsura, Kyoto 615-8520, Japan
- Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University, Suita, Osaka 565-0871, Japan
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14
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Fang F, Zhao P, Feng N, Wan H, Guan G. Surface engineering on porous perovskite-type La 0.6Sr 0.4CoO 3-δ nanotubes for an enhanced performance in diesel soot elimination. JOURNAL OF HAZARDOUS MATERIALS 2020; 399:123014. [PMID: 32516647 DOI: 10.1016/j.jhazmat.2020.123014] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 05/05/2020] [Accepted: 05/15/2020] [Indexed: 06/11/2023]
Abstract
The porous perovskite-type La0.6Sr0.4CoO3-δ nanotubes are synthesized by sol-gel method combined with electrospinning technique following the calcination, while the porous nanotubular structure can increase the utilization of active sites related to the catalytic activity in soot oxidation. In order to further improve the catalytic activity, porous La0.6Sr0.4CoO3-δ nanotubes are further treated with nitric acid to obtain a larger specific surface area in this work. The as-prepared catalysts are characterized by different techniques to study their physical and chemical properties. The soot catalytic activity is evaluated by the temperature programmed oxidation tests and the values of activation energy. Based on the characterizations and catalytic activity evaluation, the correlation between the specific surface area and catalytic activity is well revealed by the isothermal kinetic measurements. The higher specific surface area (more than 150.0 m2 g-1) contributes to a larger amount and a better dispersion of the active oxygen species, thence improving the catalytic activity of soot oxidation. As a result, porous perovskite-type La0.6Sr0.4CoO3-δ nanotubes after nitric acid treatment for 4 h have the best activity and a good stability, with the T50 of 442 °C (5% O2) and 415 °C (5% O2 + 500 ppm NO), and the Ea of 93.6 kJ mol mol-1.
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Affiliation(s)
- Fan Fang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing, 210009, PR China
| | - Peng Zhao
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing, 210009, PR China
| | - Nengjie Feng
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing, 210009, PR China
| | - Hui Wan
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing, 210009, PR China.
| | - Guofeng Guan
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing, 210009, PR China.
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Zhang Y, Xiao R, Wang S, Zhu H, Song H, Chen G, Lin H, Zhang J, Xiong J. Oxygen vacancy enhancing Fenton-like catalytic oxidation of norfloxacin over prussian blue modified CeO 2: Performance and mechanism. JOURNAL OF HAZARDOUS MATERIALS 2020; 398:122863. [PMID: 32485507 DOI: 10.1016/j.jhazmat.2020.122863] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 04/22/2020] [Accepted: 04/28/2020] [Indexed: 06/11/2023]
Abstract
To develop an efficient heterogeneous Fenton-like catalyst is of great importance for degrading organic pollutants. CeO2 was selected as the catalyst carrier. Prussian blue (PB) was chose as the iron resource for its sensitivity to H2O2 and low toxicity. PB modified CeO2 composite was successfully fabricated and used for Fenton-like oxidation of norfloxacin (NOR) in this study. The characteristics of the catalysts demonstrated that the doping of PB distorted the lattice locally and increased the surface area of CeO2 obviously. The XPS analysis also indicated that chemically supported catalysts PB/CeO2 with more Ce3+ was beneficial to Fenton-like catalytic reaction. The degradation tests showed that the PB/CeO2 significantly enhanced the removal of NOR which indicated a synergistic effect between PB and CeO2. The reason should be mainly attributed to the synergetic catalysis of H2O2 by Fe3+/Fe2+ and Ce3+/Ce4+ redox couples. At the same time, PB/CeO2 composite showed well reusability and wide pH value range of 2-9 with fairly low concentration of iron ions. The reaction mechanisms were identified to be OH oxidation and improvement of oxygen vacancies (OVs).
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Affiliation(s)
| | - Ruyi Xiao
- Guangxi University, Nanning, 530004, China
| | - Shuangfei Wang
- Guangxi University, Nanning, 530004, China; Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning, 530004, China.
| | - Hongxiang Zhu
- Guangxi University, Nanning, 530004, China; Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning, 530004, China
| | - Hainong Song
- Guangxi BOSSCO Environmental Protection Science and Technology Co., LTD., Nanning, 530004, China
| | - Guoning Chen
- Guangxi BOSSCO Environmental Protection Science and Technology Co., LTD., Nanning, 530004, China
| | - Hongfei Lin
- Guangxi BOSSCO Environmental Protection Science and Technology Co., LTD., Nanning, 530004, China
| | - Jian Zhang
- Guangxi University, Nanning, 530004, China; Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning, 530004, China
| | - Jianhua Xiong
- Guangxi University, Nanning, 530004, China; Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning, 530004, China
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16
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Synergy Between Ceria and Metals (Ag or Cu) in Catalytic Diesel Particulate Filters: Effect of the Metal Content and of the Preparation Method on the Regeneration Performance. Top Catal 2020. [DOI: 10.1007/s11244-020-01384-y] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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17
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Feng J, Wang Y, Gao D, Kang B, Li S, Li C, Chen G. Ce-Mn coordination polymer derived hierarchical/porous structured CeO 2-MnO x for enhanced catalytic properties. NANOSCALE 2020; 12:16381-16388. [PMID: 32725031 DOI: 10.1039/d0nr03028g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Catalytic performance is largely dependent on how the structures/compositions of materials are designed. Herein, CeO2-MnOx binary oxide catalysts with a hierarchical/porous structure are prepared by a facile and efficient method, which involves the preparation of the hierarchical Ce-Mn coordination polymer (CPs) precursor, followed by a thermal treatment step. The obtained CeO2-MnOx catalysts not only well inherit the hierarchical structure of Ce-Mn CPs, but also possess porous and hollow features due to the removal of organic ligands and heterogeneous contraction during the calcination process. In addition, the effect of the Mn/Ce ratio is also studied to optimize catalytic performance. Specifically, the as-prepared CeO2-MnOx (5 : 5) catalyst exhibits excellent catalytic performance toward CO oxidation and selective catalytic reduction (SCR) of NO with NH3 at low temperatures. Based on the characterization results, we propose that the special hierarchical structure, high surface area, strong synergistic interaction between CeO2 and MnOx, and high content of active Ce3+, Mn4+ and Osurf are collectively responsible for its remarkable catalytic performance.
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Affiliation(s)
- Junwei Feng
- School of Chemistry and Chemical Engineering, University of Jinan, 250022, China.
| | - Yong Wang
- Institut National de la Recherche Scientifique, 1650 Boulevard Lionel Boulet, Varennes, Québec J3X 1S2, Canada.
| | - Daowei Gao
- School of Chemistry and Chemical Engineering, University of Jinan, 250022, China.
| | - Baotao Kang
- School of Chemistry and Chemical Engineering, University of Jinan, 250022, China.
| | - Shun Li
- Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China. and Foshan (Southern China) Institute for New Materials, Foshan, 528200, Guangdong, China
| | - Chunsheng Li
- School of Chemistry and Chemical Engineering, University of Jinan, 250022, China.
| | - Guozhu Chen
- School of Chemistry and Chemical Engineering, University of Jinan, 250022, China.
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18
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Kuwahara Y, Kato G, Fujibayashi A, Mori K, Yamashita H. Diesel Soot Combustion over Mn
2
O
3
Catalysts with Different Morphologies: Elucidating the Role of Active Oxygen Species in Soot Combustion. Chem Asian J 2020; 15:2005-2014. [DOI: 10.1002/asia.202000461] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 05/08/2020] [Indexed: 11/10/2022]
Affiliation(s)
- Yasutaka Kuwahara
- Division of Materials and Manufacturing Science Graduate School of EngineeringOsaka University 2-1 Yamada-oka, Suita Osaka 565-0871 Japan
- Unit of Elements Strategy Initiative for Catalysts & Batteries (ESICB)Kyoto University Katsura Kyoto 615-8520 Japan
- JST, PRESTO 4-1-8 Honcho, Kawaguchi Saitama 332-0012 Japan
| | - Genki Kato
- Division of Materials and Manufacturing Science Graduate School of EngineeringOsaka University 2-1 Yamada-oka, Suita Osaka 565-0871 Japan
| | - Akihiro Fujibayashi
- Division of Materials and Manufacturing Science Graduate School of EngineeringOsaka University 2-1 Yamada-oka, Suita Osaka 565-0871 Japan
| | - Kohsuke Mori
- Division of Materials and Manufacturing Science Graduate School of EngineeringOsaka University 2-1 Yamada-oka, Suita Osaka 565-0871 Japan
- Unit of Elements Strategy Initiative for Catalysts & Batteries (ESICB)Kyoto University Katsura Kyoto 615-8520 Japan
| | - Hiromi Yamashita
- Division of Materials and Manufacturing Science Graduate School of EngineeringOsaka University 2-1 Yamada-oka, Suita Osaka 565-0871 Japan
- Unit of Elements Strategy Initiative for Catalysts & Batteries (ESICB)Kyoto University Katsura Kyoto 615-8520 Japan
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19
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Wang Y, Zhang L, Zhang C, Xu X, Xie Y, Chen W, Wang J, Zhang R. Promoting the Generation of Active Oxygen over Ag-Modified Nanoflower-like α-MnO2 for Soot Oxidation: Experimental and DFT Studies. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c01308] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yuhang Wang
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, Henan, China
- School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Longzhu Zhang
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Changsen Zhang
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, Henan, China
- School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Xingmin Xu
- School of Forensic Medicine, Henan University of Technology, Luoyang 471000, Henan, China
| | - Yunyun Xie
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, Henan, China
- School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Wenjun Chen
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, Henan, China
- School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Jie Wang
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, Henan, China
- School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Ruiqin Zhang
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, Henan, China
- School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, Henan, China
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