1
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Chen S, Zhang Z, Wang J, Dong P. A Bimetallic Organic Framework with Mn in MIL-101(Cr) for Lithium-Sulfur Batteries. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16103794. [PMID: 37241423 DOI: 10.3390/ma16103794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/09/2023] [Accepted: 05/11/2023] [Indexed: 05/28/2023]
Abstract
Lithium-sulfur batteries (LSBs) show excellent performance in terms of specific capacity and energy density. However, the cyclic stability of LSBs is compromised due to the "shuttle effect", which hinders the practical applications of LSBs. Herein, a metal-organic framework (MOF) based on Cr ions as the main body composition, commonly known as MIL-101(Cr), was utilized to minimize the shuttle effect and improve the cyclic performance of LSBs. To obtain MOFs with a certain adsorption capacity for lithium polysulfide and a certain catalytic capacity, we propose an effective strategy of incorporating sulfur-loving metal ions (Mn) into the skeleton to enhance the reaction kinetics at the electrode. Based on the oxidation doping method, Mn2+ was uniformly dispersed in MIL-101(Cr) to produce bimetallic Cr2O3/MnOx as a novel sulfur-carrying cathode material. Then, a sulfur injection process was carried out by melt diffusion to obtain the sulfur-containing Cr2O3/MnOx-S electrode. Moreover, an LSB assembled with Cr2O3/MnOx-S showed improved first-cycle discharge (1285 mAh·g-1 at 0.1 C) and cyclic performance (721 mAh·g-1 at 0.1 C after 100 cycles), and the overall performance was much better than that of monometallic MIL-101(Cr) as a sulfur carrier. These results revealed that the physical immobilization method of MIL-101(Cr) positively affected the adsorption of polysulfides, while the bimetallic composite Cr2O3/MnOx formed by the doping of sulfur-loving Mn2+ into the porous MOF produced a good catalytic effect during LSB charging. This research provides a novel approach for preparing efficient sulfur-containing materials for LSBs.
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Affiliation(s)
- Shuo Chen
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
| | - Zhengfu Zhang
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
| | - Jinsong Wang
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
| | - Peng Dong
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China
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2
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Nesterov N, Smirnov A, Pakharukova V, Yakovlev V, Martyanov O. Advanced green approaches for the synthesis of NiCu-containing catalysts for the hydrodeoxygenation of anisole. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.09.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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3
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Liu H, Chen BQ, Pan YJ, Fu CP, Kankala RK, Wang SB, Chen AZ. Role of supercritical carbon dioxide (scCO 2) in fabrication of inorganic-based materials: a green and unique route. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2021; 22:695-717. [PMID: 34512177 PMCID: PMC8425740 DOI: 10.1080/14686996.2021.1955603] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 06/29/2021] [Accepted: 07/08/2021] [Indexed: 06/13/2023]
Abstract
In recent times, the supercritical carbon dioxide (scCO2) process has attracted increasing attention in fabricating diverse materials due to the attractive features of environmentally benign nature and economically promising character. Owing to these unique characteristics and high-penetrability, as well as diffusivity conditions of scCO2, this high-pressure technology, with mild operation conditions, cost-effective, and non-toxic, among others, is often applied to fabricate various organic and inorganic-based materials, resulting in the unique crystal architectures (amorphous, crystalline, and heterojunction), tunable architectures (nanoparticles, nanosheets, and aerogels) for diverse applications. In this review, we give an emphasis on the fabrication of various inorganic-based materials, highlighting the recent research on the driving factors for improving the quality of fabrication in scCO2, procedures for production and dispersion in scCO2, as well as common indicators utilized to assess quality and processing ability of materials. Next, we highlight the effects of specific properties of scCO2 towards synthesizing the highly functional inorganic-based nanomaterials. Finally, we summarize this compilation with interesting perspectives, aiming to arouse a more comprehensive utilization of scCO2 to broaden the horizon in exploring the green/eco-friendly processing of such versatile inorganic-based materials. Together, we firmly believe that this compilation endeavors to disclose the latent capability and universal prevalence of scCO2 in the synthesis and processing of inorganic-based materials.
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Affiliation(s)
- Hao Liu
- Institute of Biomaterials and Tissue Engineering, Huaqiao University, Xiamen, P. R. China
- College of Chemical Engineering, Huaqiao University, Xiamen, P. R. China
| | - Biao-Qi Chen
- Institute of Biomaterials and Tissue Engineering, Huaqiao University, Xiamen, P. R. China
- Fujian Provincial Key Laboratory of Biochemical Technology, Huaqiao University, Xiamen, P. R. China
| | - Yu-Jing Pan
- Institute of Biomaterials and Tissue Engineering, Huaqiao University, Xiamen, P. R. China
| | - Chao-Ping Fu
- Institute of Biomaterials and Tissue Engineering, Huaqiao University, Xiamen, P. R. China
- Fujian Provincial Key Laboratory of Biochemical Technology, Huaqiao University, Xiamen, P. R. China
| | - Ranjith Kumar Kankala
- Institute of Biomaterials and Tissue Engineering, Huaqiao University, Xiamen, P. R. China
- College of Chemical Engineering, Huaqiao University, Xiamen, P. R. China
- Fujian Provincial Key Laboratory of Biochemical Technology, Huaqiao University, Xiamen, P. R. China
| | - Shi-Bin Wang
- Institute of Biomaterials and Tissue Engineering, Huaqiao University, Xiamen, P. R. China
- Fujian Provincial Key Laboratory of Biochemical Technology, Huaqiao University, Xiamen, P. R. China
| | - Ai-Zheng Chen
- Institute of Biomaterials and Tissue Engineering, Huaqiao University, Xiamen, P. R. China
- College of Chemical Engineering, Huaqiao University, Xiamen, P. R. China
- Fujian Provincial Key Laboratory of Biochemical Technology, Huaqiao University, Xiamen, P. R. China
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4
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Bartley JK, Dimitratos N, Edwards JK, Kiely CJ, Taylor SH. A Career in Catalysis: Graham J. Hutchings. ACS Catal 2021. [DOI: 10.1021/acscatal.1c00569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jonathan K. Bartley
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, U.K
| | - Nikolaos Dimitratos
- Department of Industrial Chemistry, Alma Mater Studiorum-University of Bologna, Viale Risorgimento, 40136, Bologna, Italy
| | - Jennifer K. Edwards
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, U.K
| | - Christopher J. Kiely
- Department of Materials Science and Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States
| | - Stuart H. Taylor
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, U.K
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5
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Solt H, Németh P, Mohai M, Sajó IE, Klébert S, Franguelli FP, Fogaca LA, Pawar RP, Kótai L. Temperature-Limited Synthesis of Copper Manganites along the Borderline of the Amorphous/Crystalline State and Their Catalytic Activity in CO Oxidation. ACS OMEGA 2021; 6:1523-1533. [PMID: 33490812 PMCID: PMC7818585 DOI: 10.1021/acsomega.0c05301] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 12/22/2020] [Indexed: 06/12/2023]
Abstract
Copper manganese oxides (CMO) with CuMn2O4 composition are well-known catalysts, which are widely used for the oxidative removal of dangerous chemicals, e.g., enhancing the CO to CO2 conversion. Their catalytic activity is the highest, close to those of the pre-crystalline and amorphous states. Here we show an easy way to prepare a stable CMO material at the borderline of the amorphous and crystalline state (BAC-CMO) at low temperatures (<100 °C) followed annealing at 300 °C and point out its excellent catalytic activity in CO oxidation reactions. We demonstrate that the temperature-controlled decomposition of [Cu(NH3)4](MnO4)2 in CHCl3 and CCl4 at 61 and 77 °C, respectively, gives rise to the formation of amorphous CMO and NH4NO3, which greatly influences the composition as well as the Cu valence state of the annealed CMOs. Washing with water and annealing at 300 °C result in a BAC-CMO material, whereas the direct annealing of the as-prepared product at 300 °C gives rise to crystalline CuMn2O4 (sCMO, 15-40 nm) and ((Cu,Mn)2O3, bCMO, 35-40 nm) mixture. The annealing temperature influences both the quantity and crystallite size of sCMO and bCMO products. In 0.5% CO/0.5% O2/He mixture the best CO to CO2 conversion rates were achieved at 200 °C with the BAC-CMO sample (0.011 mol CO2/(m2 h)) prepared in CCl4. The activity of this BAC-CMO at 125 °C decreases to half of its original value within 3 h and this activity is almost unchanged during another 20 h. The BAC-CMO catalyst can be regenerated without any loss in its catalytic activity, which provides the possibility for its long-term industrial application.
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Affiliation(s)
- Hanna
E. Solt
- Institute
of Materials and Environmental Chemistry, Research Centre for Natural Sciences, ELKH, Magyar tudósok krt. 2, Budapest H-1117, Hungary
| | - Péter Németh
- Institute
of Materials and Environmental Chemistry, Research Centre for Natural Sciences, ELKH, Magyar tudósok krt. 2, Budapest H-1117, Hungary
- Department
of Earth and Environmental Sciences, University
of Pannonia, Egyetem
út 10, Veszprém H-8200, Hungary
| | - Miklós Mohai
- Institute
of Materials and Environmental Chemistry, Research Centre for Natural Sciences, ELKH, Magyar tudósok krt. 2, Budapest H-1117, Hungary
| | - István E. Sajó
- Szentágothai
Research Center, University of Pécs, Ifjúság útja
20, Pécs H-7624, Hungary
| | - Szilvia Klébert
- Institute
of Materials and Environmental Chemistry, Research Centre for Natural Sciences, ELKH, Magyar tudósok krt. 2, Budapest H-1117, Hungary
| | - Fernanda Paiva Franguelli
- Institute
of Materials and Environmental Chemistry, Research Centre for Natural Sciences, ELKH, Magyar tudósok krt. 2, Budapest H-1117, Hungary
- Department
of Inorganic and Analytical Chemistry, Budapest
University of Technology and Economics, Műegyetem rakpart 3, Budapest H-1111, Magyarország
| | - Lara Alexandre Fogaca
- Institute
of Materials and Environmental Chemistry, Research Centre for Natural Sciences, ELKH, Magyar tudósok krt. 2, Budapest H-1117, Hungary
- Department
of Inorganic and Analytical Chemistry, Budapest
University of Technology and Economics, Műegyetem rakpart 3, Budapest H-1111, Magyarország
| | - Rajendra P. Pawar
- Organic
Chemistry Department, Deogiri College, Station Road, Aurangabad 431005, Maharastra, India
| | - László Kótai
- Institute
of Materials and Environmental Chemistry, Research Centre for Natural Sciences, ELKH, Magyar tudósok krt. 2, Budapest H-1117, Hungary
- Deuton-X
Ltd., Selmeci ut 89, Érd 2030, Hungary
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6
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Alekseev ES, Alentiev AY, Belova AS, Bogdan VI, Bogdan TV, Bystrova AV, Gafarova ER, Golubeva EN, Grebenik EA, Gromov OI, Davankov VA, Zlotin SG, Kiselev MG, Koklin AE, Kononevich YN, Lazhko AE, Lunin VV, Lyubimov SE, Martyanov ON, Mishanin II, Muzafarov AM, Nesterov NS, Nikolaev AY, Oparin RD, Parenago OO, Parenago OP, Pokusaeva YA, Ronova IA, Solovieva AB, Temnikov MN, Timashev PS, Turova OV, Filatova EV, Philippov AA, Chibiryaev AM, Shalygin AS. Supercritical fluids in chemistry. RUSSIAN CHEMICAL REVIEWS 2020. [DOI: 10.1070/rcr4932] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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7
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Zhou T, Xie A, Wang Q, Li X, Zhu Z, Zhang W, Tao Y, Luo S. A novel high-performance CeO 2-CuMn 2O 4 catalyst for toluene degradation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:43150-43162. [PMID: 32729040 DOI: 10.1007/s11356-020-10190-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 07/17/2020] [Indexed: 06/11/2023]
Abstract
A series of spinel CuM2O4 (M = Mn, Fe, and Al) was used as the catalyst to investigate the effective degradation of toluene, and then CuMn2O4 with better catalytic activity was selected as the research object to study its activity at different ratios of Cu and Mn. Meanwhile, CeO2 was introduced to modify CuMn bimetallic oxide to improve its catalytic performance. The structure, morphology, and valence states of surface elements of as-prepared catalysts were characterized by XRD, TEM, SEM, N2 adsorption-desorption, XPS, and H2-TPR. Using toluene as a probe molecule, the catalytic activity of the catalyst was tested and the results showed that the conversion rate of toluene catalyzed by CeO2-CuMn2O4 catalyst can reach 90% at 200 °C (T90) and 100% at 240 °C (T100). The CO2 yield can also reach 100% at 248 °C. Moreover, the possible catalytic mechanism for toluene by the CeO2-CuMn2O4 was briefly explored. The catalytic oxidation of toluene over the oxide follows the Mars-van Krevelen mechanism.
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Affiliation(s)
- Ting Zhou
- School of Petrochemical Engineering, Changzhou University, Changzhou, 213164, People's Republic of China
| | - Aijuan Xie
- School of Petrochemical Engineering, Changzhou University, Changzhou, 213164, People's Republic of China.
| | - Qing Wang
- School of Petrochemical Engineering, Changzhou University, Changzhou, 213164, People's Republic of China
| | - Xiang Li
- School of Petrochemical Engineering, Changzhou University, Changzhou, 213164, People's Republic of China
| | - Zerui Zhu
- School of Petrochemical Engineering, Changzhou University, Changzhou, 213164, People's Republic of China
| | - Wanqi Zhang
- School of Petrochemical Engineering, Changzhou University, Changzhou, 213164, People's Republic of China
| | - Yuwei Tao
- Center of Information Development and Management, Changzhou University, Changzhou, 213164, People's Republic of China
| | - Shiping Luo
- School of Petrochemical Engineering, Changzhou University, Changzhou, 213164, People's Republic of China.
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8
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Chen S, Li H, Hao Y, Chen R, Chen T. Porous Mn-based oxides for complete ethanol and toluene catalytic oxidation: the relationship between structure and performance. Catal Sci Technol 2020. [DOI: 10.1039/c9cy02522g] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
SmMn2O5 exhibited a higher catalytic activity for catalytic oxidation of ethanol and toluene than SmMnO3, Mn3O4 and Mn2O3. Mn3+–Mn3+ dimers facilitate C–C bond cleavage.
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Affiliation(s)
- Shaohua Chen
- Institute of New Catalytic Materials Science
- School of Materials Science and Engineering
- Key Laboratory of Advanced Energy Materials Chemistry (MOE)
- Nankai University
- Tianjin 300350
| | - Hui Li
- College of Mechanical and Electrical Engineering
- Jiaxing University
- Jiaxing 314001
- People's Republic of China
| | - Yu Hao
- Institute of New Catalytic Materials Science
- School of Materials Science and Engineering
- Key Laboratory of Advanced Energy Materials Chemistry (MOE)
- Nankai University
- Tianjin 300350
| | - Rui Chen
- Institute of New Catalytic Materials Science
- School of Materials Science and Engineering
- Key Laboratory of Advanced Energy Materials Chemistry (MOE)
- Nankai University
- Tianjin 300350
| | - Tiehong Chen
- Institute of New Catalytic Materials Science
- School of Materials Science and Engineering
- Key Laboratory of Advanced Energy Materials Chemistry (MOE)
- Nankai University
- Tianjin 300350
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9
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Zhang M, Li W, Wu X, Zhao F, Wang D, Zha X, Li S, Liu H, Chen Y. Low-temperature catalytic oxidation of benzene over nanocrystalline Cu–Mn composite oxides by facile sol–gel synthesis. NEW J CHEM 2020. [DOI: 10.1039/c9nj05097c] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We prepare a series of nanocrystalline copper–manganese oxides by a facile citric acid sol–gel method, and test their activities for catalytic oxidation of benzene.
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Affiliation(s)
- Min Zhang
- State Key Laboratory of Multi-Phase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Weiman Li
- State Key Laboratory of Multi-Phase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Xiaofeng Wu
- State Key Laboratory of Multi-Phase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Feng Zhao
- State Key Laboratory of Multi-Phase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Dongdong Wang
- State Key Laboratory of Multi-Phase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Xicuo Zha
- State Key Laboratory of Multi-Phase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Shuangde Li
- State Key Laboratory of Multi-Phase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Haidi Liu
- State Key Laboratory of Multi-Phase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Yunfa Chen
- State Key Laboratory of Multi-Phase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- China
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10
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Dey S, Dhal GC, Mohan D, Prasad R. Application of hopcalite catalyst for controlling carbon monoxide emission at cold-start emission conditions. JOURNAL OF TRAFFIC AND TRANSPORTATION ENGINEERING (ENGLISH ED. ONLINE) 2019. [DOI: 10.1016/j.jtte.2019.06.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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11
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Wegner K, Zippel R, Medicus M, Schade E, Grothe J, Kaskel S. Molecular Precursors for Tailoring Humidity Tolerance of Nanoscale Hopcalite Catalysts Via Flame Spray Pyrolysis. ChemCatChem 2019. [DOI: 10.1002/cctc.201900990] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Karl Wegner
- Department of Inorganic ChemistryTechnische Universität Dresden Bergstrasse 66 Dresden 01069 Germany
| | - Rene Zippel
- Department of Inorganic ChemistryTechnische Universität Dresden Bergstrasse 66 Dresden 01069 Germany
| | - Maximilian Medicus
- Department of Inorganic ChemistryTechnische Universität Dresden Bergstrasse 66 Dresden 01069 Germany
| | - Elke Schade
- Department of Inorganic ChemistryTechnische Universität Dresden Bergstrasse 66 Dresden 01069 Germany
| | - Julia Grothe
- Department of Inorganic ChemistryTechnische Universität Dresden Bergstrasse 66 Dresden 01069 Germany
| | - Stefan Kaskel
- Department of Inorganic ChemistryTechnische Universität Dresden Bergstrasse 66 Dresden 01069 Germany
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12
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Wegner K, Medicus M, Schade E, Grothe J, Kaskel S. Tailoring Catalytic Properties of Copper Manganese Oxide Nanoparticles (Hopcalites-2G) via Flame Spray Pyrolysis. ChemCatChem 2018. [DOI: 10.1002/cctc.201800639] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Karl Wegner
- Department of Inorganic Chemistry; University of Technology Dresden, Neubau Chemische Institute; Bergstrasse 66 01069 Dresden
| | - Maximilian Medicus
- Department of Inorganic Chemistry; University of Technology Dresden, Neubau Chemische Institute; Bergstrasse 66 01069 Dresden
| | - Elke Schade
- Department of Inorganic Chemistry; University of Technology Dresden, Neubau Chemische Institute; Bergstrasse 66 01069 Dresden
| | - Julia Grothe
- Department of Inorganic Chemistry; University of Technology Dresden, Neubau Chemische Institute; Bergstrasse 66 01069 Dresden
| | - Stefan Kaskel
- Department of Inorganic Chemistry; University of Technology Dresden, Neubau Chemische Institute; Bergstrasse 66 01069 Dresden
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13
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Nanostructured Oxides Synthesised via scCO2-Assisted Sol-Gel Methods and Their Application in Catalysis. Catalysts 2018. [DOI: 10.3390/catal8050212] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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14
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Kashyap V, Kurungot S. Zirconium-Substituted Cobalt Ferrite Nanoparticle Supported N-doped Reduced Graphene Oxide as an Efficient Bifunctional Electrocatalyst for Rechargeable Zn–Air Battery. ACS Catal 2018. [DOI: 10.1021/acscatal.7b03823] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Varchaswal Kashyap
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411 008, India
- Academy of Scientific and Innovative Research, Anusandhan Bhawan, 2 Rafi Marg, New Delhi 110 001, India
| | - Sreekumar Kurungot
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411 008, India
- Academy of Scientific and Innovative Research, Anusandhan Bhawan, 2 Rafi Marg, New Delhi 110 001, India
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15
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Water as a cosolvent – Effective tool to avoid phase separation in bimetallic Ni-Cu catalysts obtained via supercritical antisolvent approach. J Supercrit Fluids 2017. [DOI: 10.1016/j.supflu.2017.08.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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16
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Dey S, Dhal GC, Mohan D, Prasad R. Kinetics of catalytic oxidation of carbon monoxide over CuMnAgOx catalyst. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.md.2017.09.001] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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17
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Smith PJ, Kondrat SA, Carter JH, Chater PA, Bartley JK, Taylor SH, Spencer MS, Hutchings GJ. Supercritical Antisolvent Precipitation of Amorphous Copper-Zinc Georgeite and Acetate Precursors for the Preparation of Ambient-Pressure Water-Gas-Shift Copper/Zinc Oxide Catalysts. ChemCatChem 2017; 9:1621-1631. [PMID: 28706569 PMCID: PMC5485020 DOI: 10.1002/cctc.201601603] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 02/10/2017] [Indexed: 11/17/2022]
Abstract
A series of copper–zinc acetate and zincian georgeite precursors have been produced by supercritical CO2 antisolvent (SAS) precipitation as precursors to Cu/ZnO catalysts for the water gas shift (WGS) reaction. The amorphous materials were prepared by varying the water/ethanol volumetric ratio in the initial metal acetate solutions. Water addition promoted georgeite formation at the expense of mixed metal acetates, which are formed in the absence of the water co‐solvent. Optimum SAS precipitation occurs without water to give high surface areas, whereas high water content gives inferior surface areas and copper–zinc segregation. Calcination of the acetates is exothermic, producing a mixture of metal oxides with high crystallinity. However, thermal decomposition of zincian georgeite resulted in highly dispersed CuO and ZnO crystallites with poor structural order. The georgeite‐derived catalysts give superior WGS performance to the acetate‐derived catalysts, which is attributed to enhanced copper–zinc interactions that originate from the precursor.
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Affiliation(s)
- Paul J Smith
- Cardiff Catalysis Institute, School of Chemistry Cardiff University Main Building, Park Place Cardiff CF10 3AT UK
| | - Simon A Kondrat
- Cardiff Catalysis Institute, School of Chemistry Cardiff University Main Building, Park Place Cardiff CF10 3AT UK
| | - James H Carter
- Cardiff Catalysis Institute, School of Chemistry Cardiff University Main Building, Park Place Cardiff CF10 3AT UK
| | | | - Jonathan K Bartley
- Cardiff Catalysis Institute, School of Chemistry Cardiff University Main Building, Park Place Cardiff CF10 3AT UK
| | - Stuart H Taylor
- Cardiff Catalysis Institute, School of Chemistry Cardiff University Main Building, Park Place Cardiff CF10 3AT UK
| | - Michael S Spencer
- Cardiff Catalysis Institute, School of Chemistry Cardiff University Main Building, Park Place Cardiff CF10 3AT UK
| | - Graham J Hutchings
- Cardiff Catalysis Institute, School of Chemistry Cardiff University Main Building, Park Place Cardiff CF10 3AT UK
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18
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Kondrat SA, Smith PJ, Carter JH, Hayward JS, Pudge GJ, Shaw G, Spencer MS, Bartley JK, Taylor SH, Hutchings GJ. The effect of sodium species on methanol synthesis and water–gas shift Cu/ZnO catalysts: utilising high purity zincian georgeite. Faraday Discuss 2017; 197:287-307. [DOI: 10.1039/c6fd00202a] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effect of sodium species on the physical and catalytic properties of Cu/ZnO catalysts derived from zincian georgeite has been investigated. Catalysts prepared with <100 ppm to 2.1 wt% Na+, using a supercritical CO2 antisolvent technique, were characterised and tested for the low temperature water–gas shift reaction and also CO2 hydrogenation to methanol. It was found that zincian georgeite catalyst precursor stability was dependent on the Na+ concentration, with the 2.1 wt% Na+-containing sample uncontrollably ageing to malachite and sodium zinc carbonate. Samples with lower Na+ contents (<100–2500 ppm) remained as the amorphous zincian georgeite phase, which on calcination and reduction resulted in similar CuO/Cu particle sizes and Cu surface areas. The aged 2.1 wt% Na+ containing sample, after calcination and reduction, was found to comprise of larger CuO crystallites and a lower Cu surface area. However, calcination of the high Na+ sample immediately after precipitation (before ageing) resulted in a comparable CuO/Cu particle size to the lower (<100–2500 ppm) Na+ containing samples, but with a lower Cu surface area, which indicates that Na+ species block Cu sites. Activity of the catalysts for the water–gas shift reaction and methanol yields in the methanol synthesis reaction correlated with Na+ content, suggesting that Na+ directly poisons the catalyst. In situ XRD analysis showed that the ZnO crystallite size and consequently Cu crystallite size increased dramatically in the presence of water in a syn-gas reaction mixture, showing that stabilisation of nanocrystalline ZnO is required. Sodium species have a moderate effect on ZnO and Cu crystallite growth rate, with lower Na+ content resulting in slightly reduced rates of growth under reaction conditions.
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Affiliation(s)
| | - Paul J. Smith
- Cardiff Catalysis Institute
- Cardiff University
- Cardiff
- UK
| | | | | | | | - Greg Shaw
- Cardiff Catalysis Institute
- Cardiff University
- Cardiff
- UK
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19
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Copper Manganese Oxides Supported on Multi-Walled Carbon Nanotubes as an Efficient Catalyst for Low Temperature CO Oxidation. Catal Letters 2016. [DOI: 10.1007/s10562-016-1869-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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Kashyap V, Singh SK, Kurungot S. Cobalt Ferrite Bearing Nitrogen-Doped Reduced Graphene Oxide Layers Spatially Separated with Microporous Carbon as Efficient Oxygen Reduction Electrocatalyst. ACS APPLIED MATERIALS & INTERFACES 2016; 8:20730-40. [PMID: 27464229 DOI: 10.1021/acsami.6b05416] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The present work discloses how high-quality dispersion of fine particles of cobalt ferrite (CF) could be attained on nitrogen-doped reduced graphene oxide (CF/N-rGO) and how this material in association with a microporous carbon phase could deliver significantly enhanced activity toward electrochemical oxygen reduction reaction (ORR). Our study indicates that the microporous carbon phase plays a critical role in spatially separating the layers of CF/N-rGO and in creating a favorable atmosphere to ensure the seamless distribution of the reactants to the active sites located on CF/N-rGO. In terms of the ORR current density, the heat-treated hybrid catalyst at 150 °C (CF/N-rGO-150) is found to be clearly outperforming (7.4 ± 0.5 mA/cm(2)) the state-of-the-art 20 wt % Pt-supported carbon catalyst (PtC) (5.4 ± 0.5 mA/cm(2)). The mass activity and stability of CF-N-rGO-150 are distinctly superior to PtC even after 5000 electrochemical cycles. As a realistic system level exploration of the catalyst, testing of a primary zinc-air battery could be demonstrated using CF/N-rGO-150 as the cathode catalyst. The battery is giving a galvanostatic discharge time of 15 h at a discharge current density of 20 mA/cm(2) and a specific capacity of ∼630 mAh g(-1) in 6 M KOH by using a Zn foil as the anode. Distinctly, the battery performance of this system is found to be superior to that of PtC in less concentrated KOH solution as the electrolyte.
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Affiliation(s)
- Varchaswal Kashyap
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory , Dr. Homi Bhabha Road, Pune 41108, India
- Academy of Scientific and Innovative Research , Anusandhan Bhawan, 2 Rafi Marg, New Delhi 110001, India
| | - Santosh K Singh
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory , Dr. Homi Bhabha Road, Pune 41108, India
- Academy of Scientific and Innovative Research , Anusandhan Bhawan, 2 Rafi Marg, New Delhi 110001, India
| | - Sreekumar Kurungot
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory , Dr. Homi Bhabha Road, Pune 41108, India
- Academy of Scientific and Innovative Research , Anusandhan Bhawan, 2 Rafi Marg, New Delhi 110001, India
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Yu L, Zhang Y, Hudak BM, Wallace DK, Kim DY, Guiton BS. Simple synthetic route to manganese-containing nanowires with the spinel crystal structure. J SOLID STATE CHEM 2016. [DOI: 10.1016/j.jssc.2016.05.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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22
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Nesterov N, Paharukova V, Yakovlev V, Martyanov O. The facile synthesis of Ni–Cu catalysts stabilized in SiO2 framework via a supercritical antisolvent approach. J Supercrit Fluids 2016. [DOI: 10.1016/j.supflu.2016.03.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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23
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Synthesis of highly dispersed MnOx–CeO2 nanospheres by surfactant-assisted supercritical anti-solvent (SAS) technique: The important role of the surfactant. J Supercrit Fluids 2014. [DOI: 10.1016/j.supflu.2014.05.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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24
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Marin RP, Kondrat SA, Davies TE, Morgan DJ, Enache DI, Combes GB, Taylor SH, Bartley JK, Hutchings GJ. Novel cobalt zinc oxide Fischer–Tropsch catalysts synthesised using supercritical anti-solvent precipitation. Catal Sci Technol 2014. [DOI: 10.1039/c4cy00044g] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cobalt zinc oxide catalysts have been prepared by anti-solvent precipitation in supercritical CO2 and investigated for CO hydrogenation.
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Affiliation(s)
- Raimon P. Marin
- Cardiff Catalyst Institute
- School of Chemistry
- Cardiff University
- Cardiff, UK
- Johnson Matthey Plc
| | - Simon A. Kondrat
- Cardiff Catalyst Institute
- School of Chemistry
- Cardiff University
- Cardiff, UK
| | - Thomas E. Davies
- Cardiff Catalyst Institute
- School of Chemistry
- Cardiff University
- Cardiff, UK
| | - David J. Morgan
- Cardiff Catalyst Institute
- School of Chemistry
- Cardiff University
- Cardiff, UK
| | | | | | - Stuart H. Taylor
- Cardiff Catalyst Institute
- School of Chemistry
- Cardiff University
- Cardiff, UK
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25
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Liu Y, Wang Y, Xu X, Sun P, Chen T. Facile one-step room-temperature synthesis of Mn-based spinel nanoparticles for electro-catalytic oxygen reduction. RSC Adv 2014. [DOI: 10.1039/c3ra47065b] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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26
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Kunkalekar RK, Salker AV. Activity of Pd doped and supported Mn2O3 nanomaterials for CO oxidation. REACTION KINETICS MECHANISMS AND CATALYSIS 2012. [DOI: 10.1007/s11144-012-0443-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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