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Onur E, Lee J, Aymerich-Armengol R, Lim J, Dai Y, Tüysüz H, Scheu C, Weidenthaler C. Exploring the Effects of the Photochromic Response and Crystallization on the Local Structure of Noncrystalline Niobium Oxide. ACS APPLIED MATERIALS & INTERFACES 2024; 16:25136-25147. [PMID: 38687307 PMCID: PMC11103654 DOI: 10.1021/acsami.4c04038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Revised: 04/19/2024] [Accepted: 04/24/2024] [Indexed: 05/02/2024]
Abstract
Niobium oxide (Nb2O5) is a versatile semiconductor material with photochromic properties. This study investigates the local structure of noncrystalline, short-range-ordered niobium oxide synthesized via a sol-gel method. X-ray atomic pair distribution function analysis unravels the structural arrangements within the noncrystalline materials at a local scale. In the following, in situ scattering and diffraction experiments elucidate the heat-induced structure transformation of the amorphous material into crystalline TT-Nb2O5 at 550 °C. In addition, the effect of photocatalytic conditions on the structure of the material was investigated by exposing the short-range-ordered and crystalline materials to ultraviolet light, resulting in a reversible color change from white to dark brown or blue. This photochromic response is due to the reversible elongation of the nearest Nb-O neighbors, as shown by local structure analysis based on in situ PDF analyses. Optical band gap calculations based on the ultraviolet-visible spectra collected for both the short-range-ordered and crystalline materials show that the band gap values reduced for the darkened materials return to their initial state after bleaching. Furthermore, electron energy loss spectroscopy reveals the reduction of Nb5+ to Nb4+ centers as a persistent effect. The study establishes a correlation between the band gap and the structure of niobium oxide, providing insights into the structure-performance relation at the atomic level.
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Affiliation(s)
- Ezgi Onur
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Jinsun Lee
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | | | - Joohyun Lim
- Max-Planck-Institut
für Eisenforschung, Max-Planck-Straße 1, 40237 Düsseldorf, Germany
| | - Yitao Dai
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Harun Tüysüz
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Christina Scheu
- Max-Planck-Institut
für Eisenforschung, Max-Planck-Straße 1, 40237 Düsseldorf, Germany
| | - Claudia Weidenthaler
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
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2
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Pang R, Wang Z, Li J, Chen K. Polymorphs of Nb 2O 5 Compound and Their Electrical Energy Storage Applications. MATERIALS (BASEL, SWITZERLAND) 2023; 16:6956. [PMID: 37959554 PMCID: PMC10647839 DOI: 10.3390/ma16216956] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 10/26/2023] [Accepted: 10/27/2023] [Indexed: 11/15/2023]
Abstract
Niobium pentoxide (Nb2O5), as an important dielectric and semiconductor material, has numerous crystal polymorphs, higher chemical stability than water and oxygen, and a higher melt point than most metal oxides. Nb2O5 materials have been extensively studied in electrochemistry, lithium batteries, catalysts, ionic liquid gating, and microelectronics. Nb2O5 polymorphs provide a model system for studying structure-property relationships. For example, the T-Nb2O5 polymorph has two-dimensional layers with very low steric hindrance, allowing for rapid Li-ion migration. With the ever-increasing energy crisis, the excellent electrical properties of Nb2O5 polymorphs have made them a research hotspot for potential applications in lithium-ion batteries (LIBs) and supercapacitors (SCs). The basic properties, crystal structures, synthesis methods, and applications of Nb2O5 polymorphs are reviewed in this article. Future research directions related to this material are also briefly discussed.
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Affiliation(s)
- Rui Pang
- School of Material Science and Engineering, University of Jinan, Jinan 250022, China;
| | - Zhiqiang Wang
- State Key Laboratory of Crystal Materials, Institute of Novel Semiconductors, Shandong University, Jinan 250100, China;
| | - Jinkai Li
- School of Material Science and Engineering, University of Jinan, Jinan 250022, China;
| | - Kunfeng Chen
- State Key Laboratory of Crystal Materials, Institute of Novel Semiconductors, Shandong University, Jinan 250100, China;
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Schardosim RFDC, Cardozo TR, de Souza AP, Seeber A, Flores WH, Lehmann M, Dihl RR. Cyto-genotoxicity of crystalline and amorphous niobium (V) oxide nanoparticles in CHO-K1 cells. Toxicol Res (Camb) 2022; 11:765-773. [PMID: 36337238 PMCID: PMC9618107 DOI: 10.1093/toxres/tfac054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 06/27/2022] [Accepted: 07/20/2022] [Indexed: 08/28/2023] Open
Abstract
Niobium (V) oxide nanoparticles (NINPs) have been widely and increasingly applied in various health products and industrial processes. This merits further study of their toxicity. Here, we investigated the potential of NINPs to induce DNA damage, cytotoxicity, and chromosome instability in cultured CHO-K1 cells. NINPs were physico-chemically characterized. As assessed by comet assay, crystalline and amorphous NINPs were genotoxic at the highest concentrations evaluated. The cytokinesis-block micronucleus assay demonstrated that a 24-h treatment with NINPs, for the crystalline and the amorphous samples, significantly reduced the nuclear division cytotoxicity index. In addition, a 4-h treatment period of crystalline NINPs increased micronucleus (MNi) frequencies. MNi, nucleoplasmic bridges and nuclear buds were detected after exposure of the cells for 24 h to crystalline NINPs. In the amorphous sample, chromosome instability was restricted to the induction of MNi, in the 24-h treatment, detected at all tested concentrations. The fluorescence and dark field microscopy demonstrated the uptake of NINPs by CHO-K1 cells and an intracellular distribution outlining the nucleus. Our data advance understanding of the cytotoxic and genotoxic effects of NINPs and should be taken into consideration when setting up guidelines for their use in industrial or health products.
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Affiliation(s)
- Raíne Fogliati De Carli Schardosim
- Laboratory of Genetic Toxicity and Cellular Toxic-Genetics Analysis, Graduate Program in Molecular and Cellular Biology Applied to Health, Lutheran University of Brazil (ULBRA), Avenida Farroupilha, 8001, 92425-900, Canoas, RS, Brazil
| | - Tatiane Rocha Cardozo
- Laboratory of Genetic Toxicity and Cellular Toxic-Genetics Analysis, Graduate Program in Molecular and Cellular Biology Applied to Health, Lutheran University of Brazil (ULBRA), Avenida Farroupilha, 8001, 92425-900, Canoas, RS, Brazil
- Research Group on Nanostructured Materials, Federal University of the Pampa, Campus Bagé, Avenida Maria Anunciação Gomes de Godoy, 1650, 96413-172, RS, Brazil
| | - Ana Paula de Souza
- Laboratory of Genetic Toxicity and Cellular Toxic-Genetics Analysis, Graduate Program in Molecular and Cellular Biology Applied to Health, Lutheran University of Brazil (ULBRA), Avenida Farroupilha, 8001, 92425-900, Canoas, RS, Brazil
| | - Allan Seeber
- Research Group on Nanostructured Materials, Federal University of the Pampa, Campus Bagé, Avenida Maria Anunciação Gomes de Godoy, 1650, 96413-172, RS, Brazil
| | - Wladimir Hernandez Flores
- Research Group on Nanostructured Materials, Federal University of the Pampa, Campus Bagé, Avenida Maria Anunciação Gomes de Godoy, 1650, 96413-172, RS, Brazil
| | - Maurício Lehmann
- Laboratory of Genetic Toxicity and Cellular Toxic-Genetics Analysis, Graduate Program in Molecular and Cellular Biology Applied to Health, Lutheran University of Brazil (ULBRA), Avenida Farroupilha, 8001, 92425-900, Canoas, RS, Brazil
| | - Rafael Rodrigues Dihl
- Laboratory of Genetic Toxicity and Cellular Toxic-Genetics Analysis, Graduate Program in Molecular and Cellular Biology Applied to Health, Lutheran University of Brazil (ULBRA), Avenida Farroupilha, 8001, 92425-900, Canoas, RS, Brazil
- Postgraduate Program in Dentistry, Lutheran University of Brazil (ULBRA), Avenida Farroupilha, 8001, 92425-900, Canoas, RS, Brazil
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4
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Fast Pyrolysis Oil Upgrading via HDO with Fe-Promoted Nb2O5-Supported Pd-Based Catalysts. ENERGIES 2022. [DOI: 10.3390/en15134762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
Due to the high acid, oxygen and water contents of fast pyrolysis oil, it requires the improvement of its fuel properties by further upgrading, such as catalytic hydrodeoxygenation (HDO). In this study, Nb2O5 was evaluated as a support of Pd-based catalysts for HDO of fast pyrolysis oil. A Pd/SiO2 catalyst was used as a reference. Additionally, the impact of iron as a promoter in two different loadings was investigated. The activity of the synthesized catalysts was evaluated in terms of H2 uptake and composition of the upgraded products (gas phase, upgraded oil and aqueous phase) through elemental analysis, Karl Fischer titration, GC-MS/FID and 1H-NMR. In comparison to SiO2, due to its acid sites, Nb2O5 enhanced the catalyst activity towards hydrogenolysis and hydrogenation, confirmed by the increased water formation during HDO and a higher content of hydrogen and aliphatic protons in the upgraded oil. Consequently, the upgraded oil with Nb2O5 had a lower average molecular weight and was therefore less viscous than the oil obtained with SiO2. When applied as a promoter, Fe enhanced hydrogenation and hydrogenolysis, although it slightly decreased the acidity of the support, owing to its oxophilic nature, leading to the highest deoxygenation degree (42.5 wt.%) and the highest product HHV (28.2 MJ/kg).
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Thermochemical and Catalytic Conversion Technologies for the Development of Brazilian Biomass Utilization. Catalysts 2021. [DOI: 10.3390/catal11121549] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The social, economic, and environmental impacts of climate change have been shown to affect poorer populations throughout the world disproportionally, and the COVID-19 pandemic of 2020–2021 has only exacerbated the use of less sustainable energy, fuel, and chemical sources. The period of economic and social recovery following the pandemic presents an unprecedented opportunity to invest in biorefineries based on the pyrolysis of agricultural residues. These produce a plethora of sustainable resources while also contributing to the economic valorization of first-sector local economies. However, biomass-derived pyrolysis liquid is highly oxygenated, which hinders its long-term stability and usability. Catalytic hydrogenation is a proposed upgrading method to reduce this hindrance, while recent studies on the use of nickel and niobium as low-cost catalysts, both abundant in Brazil, reinforce the potential synergy between different economic sectors within the country. This review gathers state-of-the-art applications of these technologies with the intent to guide the scientific community and lawmakers alike on yet another alternative for energy and commodities production within an environmentally sustainable paradigm.
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Rambaran MA, Gorzsás A, Holmboe M, Ohlin CA. Polyoxoniobates as molecular building blocks in thin films. Dalton Trans 2021; 50:16030-16038. [PMID: 34613326 DOI: 10.1039/d1dt03116c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Niobium oxide thin films have been prepared by spin-coating aqueous solutions of tetramethylammonium salts of the isostructural polyoxometalate clusters [Nb10O28]6-, [TiNb9O28]7- and [Ti2Nb8O28]8- onto silicon wafers, and annealing them. The [Nb10O28]6- cluster yields films of Nb2O5 in the orthorhombic and monoclinic crystal phases when annealed at 800 °C and 1000 °C, respectively, whereas the [TiNb9O28]7- and [Ti2Nb8O28]8- clusters yield the monoclinic crystal phases of Ti2Nb12O29 and TiNb2O7 (titanium-niobium oxides) in different ratios. We also demonstrate a protocol for depositing successive layers of metal oxide films. Finally, we explore factors affecting the roughness of the films.
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Affiliation(s)
- Mark A Rambaran
- Department of Chemistry, Faculty of Science and Technology, Umeå University, 907 36 Sweden.
| | - András Gorzsás
- Department of Chemistry, Faculty of Science and Technology, Umeå University, 907 36 Sweden.
| | - Michael Holmboe
- Department of Chemistry, Faculty of Science and Technology, Umeå University, 907 36 Sweden.
| | - C André Ohlin
- Department of Chemistry, Faculty of Science and Technology, Umeå University, 907 36 Sweden.
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7
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Abreu E, Fidelis M, Fuziki M, Malikoski R, Mastsubara M, Imada R, Diaz de Tuesta J, Gomes H, Anziliero M, Baldykowski B, Dias D, Lenzi G. Degradation of emerging contaminants: Effect of thermal treatment on nb2o5 as photocatalyst. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113484] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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8
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Ding H, Song Z, Feng K, Zhang H, Zhang H, Li X. Controlled synthesis of pure-phase metastable tetragonal Nb2O5 anode material for high-performance lithium batteries. J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2021.122136] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Silva JGAB, Santos RC, Rodríguez-Castellón E, Teixeira LSG, Pontes LAM. Catalytic conversion of glucose into sorbitol over niobium oxide supported Ru catalysts. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111567] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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10
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Shen F, Sun Z, He Q, Sun J, Kaner RB, Shao Y. Niobium pentoxide based materials for high rate rechargeable electrochemical energy storage. MATERIALS HORIZONS 2021; 8:1130-1152. [PMID: 34821908 DOI: 10.1039/d0mh01481h] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The demand for high rate energy storage systems is continuously increasing driven by portable electronics, hybrid/electric vehicles and the need for balancing the smart grid. Accordingly, Nb2O5 based materials have gained great attention because of their fast cation intercalation faradaic charge storage that endows them with high rate energy storage performance. In this review, we describe the crystalline features of the five main phases of Nb2O5 and analyze their specific electrochemical characteristics with an emphasis on the intrinsic ion intercalation pseudocapacitive behavior of T-Nb2O5. The charge storage mechanisms, electrochemical performance and state-of-the-art characterization techniques for Nb2O5 anodes are summarized. Next, we review recent progress in developing various types of Nb2O5 based fast charging electrode materials, including Nb2O5 based mixed metal oxides and composites. Finally, we highlight the major challenges for Nb2O5 based materials in the realm of high rate rechargeable energy storage and provide perspectives for future research.
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Affiliation(s)
- Fei Shen
- College of Energy, Soochow Institute for Energy and Materials InnovationS (SIEMIS), Jiangsu Provincial Key Laboratory for Advanced Carbon Materials and Wearable Energy Technologies, Soochow University, 215006 Suzhou, P. R. China.
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11
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Tirsoaga A, Kuncser V, Parvulescu VI, Coman SM. Niobia-based magnetic nanocomposites: Design and application in direct glucose dehydration to HMF. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.09.033] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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12
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Siddiki SMAH, Rashed MN, Touchy AS, Jamil MAR, Jing Y, Toyao T, Maeno Z, Shimizu KI. Hydrolysis of amides to carboxylic acids catalyzed by Nb 2O 5. Catal Sci Technol 2021. [DOI: 10.1039/d0cy02230f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
An efficient heterogeneous Nb2O5 catalytic system has been developed for industrially important and challenging amide hydrolysis reaction to carboxylic acid through cleavage of resonance stabilized amidic C–N bond.
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Affiliation(s)
| | | | | | - Md. A. R. Jamil
- Institute for Catalysis
- Hokkaido University
- Sapporo 001-0021
- Japan
| | - Yuan Jing
- Institute for Catalysis
- Hokkaido University
- Sapporo 001-0021
- Japan
| | - Takashi Toyao
- Institute for Catalysis
- Hokkaido University
- Sapporo 001-0021
- Japan
- Elements Strategy Initiative for Catalysts and Batteries
| | - Zen Maeno
- Institute for Catalysis
- Hokkaido University
- Sapporo 001-0021
- Japan
| | - Ken-ichi Shimizu
- Institute for Catalysis
- Hokkaido University
- Sapporo 001-0021
- Japan
- Elements Strategy Initiative for Catalysts and Batteries
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13
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Abstract
Niobium oxides (NbO, NbO2, Nb2O5), being a versatile material has achieved tremendous popularity to be used in a number of applications because of its outstanding electrical, mechanical, chemical, and magnetic properties. NbxOy films possess a direct band gap within the ranges of 3.2–4.0 eV, with these films having utility in different applications which include; optical systems, stainless steel, ceramics, solar cells, electrochromic devices, capacitor dielectrics, catalysts, sensors, and architectural requirements. With the purpose of fulfilling the requirements of a vast variety of the named applications, thin films having comprehensive properties span described by film composition, morphology, structural properties, and thickness are needed. The theory, alongside the research status of the different fabrication techniques of NbxOy thin films are reported in this work. The impact of fabrication procedures on the thin film characteristics which include; film thickness, surface quality, optical properties, interface properties, film growth, and crystal phase is explored with emphases on the distinct deposition process applied, are also described and discussed.
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14
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Rodríguez-Castellón E, Delgado D, Dejoz A, Vázquez I, Agouram S, Cecilia JA, Solsona B, López Nieto JM. Enhanced NiO Dispersion on a High Surface Area Pillared Heterostructure Covered by Niobium Leads to Optimal Behaviour in the Oxidative Dehydrogenation of Ethane. Chemistry 2020; 26:9371-9381. [PMID: 32301531 DOI: 10.1002/chem.202000832] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 04/03/2020] [Indexed: 11/08/2022]
Abstract
A Nb-containing siliceous porous clay heterostructure (PCH) with Nb contents from 0 to 30 wt %) was prepared from a bentonite and used as support in the preparation of supported NiO catalysts with NiO loading from 15 to 80 wt %. Supports and NiO-containing catalysts were characterised by several physicochemical techniques and tested in the oxidative dehydrogenation (ODH) of ethane. The characterisation studies on Nb-containing supports showed the presence of well-anchored Nb5+ species without the formation of Nb2 O5 crystals. High dispersion of nickel oxide with low crystallinity was observed for the Nb-containing PCH supports. In addition, when NiO is supported on these Nb-containing porous clays, it is more effective in the ODH of ethane (ethylene selectivity of ca. 90 %) than NiO supported on the corresponding Nb-free siliceous PCH or on Nb2 O5 (ethylene selectivities of ca. 30 and 60 %, respectively). Factors such as the NiO-Nb5+ interaction, the NiO particle size and the properties of surface Nin+ species were shown to determine the catalytic performance.
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Affiliation(s)
| | - Daniel Delgado
- Instituto de Tecnología Química, Universitat Politècnica de València-Consejo, Superior de Investigaciones Científicas, Avenida de los Naranjos s/n, 46022, Valencia, Spain
| | - Ana Dejoz
- Department of Chemical Engineering, Universitat de València, Av. Universitat s/n, 46100, Burjassot, Valencia, Spain
| | - Isabel Vázquez
- Department of Chemical Engineering, Universitat de València, Av. Universitat s/n, 46100, Burjassot, Valencia, Spain
| | - Said Agouram
- Department of Applied Physics and Electromagnetism, Universitat de València, C/Dr. Moliner 50, 46100, Burjassot, Valencia, Spain
| | - Juan A Cecilia
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Málaga, 29071, Málaga, Spain
| | - Benjamín Solsona
- Department of Chemical Engineering, Universitat de València, Av. Universitat s/n, 46100, Burjassot, Valencia, Spain
| | - José M López Nieto
- Instituto de Tecnología Química, Universitat Politècnica de València-Consejo, Superior de Investigaciones Científicas, Avenida de los Naranjos s/n, 46022, Valencia, Spain
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15
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Kumabe Y, Taga H, Kan K, Ohtani M, Kobiro K. Porous niobia spheres with large surface area: alcothermal synthesis and controlling of their composition and phase transition behaviour. RSC Adv 2020; 10:14630-14636. [PMID: 35497150 PMCID: PMC9051927 DOI: 10.1039/d0ra01704c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Accepted: 04/03/2020] [Indexed: 11/28/2022] Open
Abstract
Submicron-sized niobia (Nb2O5) porous spheres with a high specific surface area (300 m2 g-1) and nano concave-convex surfaces were synthesized via a rapid one-pot single-step alcothermal reaction. Prolonged reaction time or high reaction temperatures resulted in a morphology change of Nb2O5 from amorphous sphere to rod crystals with hexagonal crystal phase. A similar alcothermal reaction yielded TiO2-Nb2O5 composite porous spheres, whose Ti : Nb molar ratio was controlled by changing the precursor solution component ratios. A simple thermal treatment of amorphous TiO2-Nb2O5 porous spheres consisting of 1 : 2 (molar ratio) Ti : Nb at 600 °C for 2 h induced crystal phase transfer from amorphous to a monoclinic crystal phase of submicron-sized TiNb2O7 porous spheres with a specific surface area of 50 m2 g-1.
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Affiliation(s)
- Yoshitaka Kumabe
- School of Environmental Science and Engineering, Kochi University of Technology 185 Miyanokuchi, Tosayamada, Kami Kochi 782-8502 Japan
| | - Hitomi Taga
- School of Environmental Science and Engineering, Kochi University of Technology 185 Miyanokuchi, Tosayamada, Kami Kochi 782-8502 Japan
| | - Kai Kan
- School of Environmental Science and Engineering, Kochi University of Technology 185 Miyanokuchi, Tosayamada, Kami Kochi 782-8502 Japan
- Laboratory for Structural Nanochemistry, Kochi University of Technology 185 Miyanokuchi, Tosayamada, Kami Kochi 782-8502 Japan
- Research Center for Material Science and Engineering, Kochi University of Technology 185 Miyanokuchi, Tosayamada, Kami Kochi 782-8502 Japan
| | - Masataka Ohtani
- School of Environmental Science and Engineering, Kochi University of Technology 185 Miyanokuchi, Tosayamada, Kami Kochi 782-8502 Japan
- Laboratory for Structural Nanochemistry, Kochi University of Technology 185 Miyanokuchi, Tosayamada, Kami Kochi 782-8502 Japan
- Research Center for Material Science and Engineering, Kochi University of Technology 185 Miyanokuchi, Tosayamada, Kami Kochi 782-8502 Japan
| | - Kazuya Kobiro
- School of Environmental Science and Engineering, Kochi University of Technology 185 Miyanokuchi, Tosayamada, Kami Kochi 782-8502 Japan
- Laboratory for Structural Nanochemistry, Kochi University of Technology 185 Miyanokuchi, Tosayamada, Kami Kochi 782-8502 Japan
- Research Center for Material Science and Engineering, Kochi University of Technology 185 Miyanokuchi, Tosayamada, Kami Kochi 782-8502 Japan
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16
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Abstract
Abstract
Niobium pentoxides are promising acid catalysts for the conversion of biomass into fuels and chemicals. Developing new synthesis routes is essential for designing niobium pentoxide catalysts with improved activity for specific practical processes. Here we show a synthesis approach in acetophenone, which produces nanostructured niobium pentoxides with varying structure and acidity that act as efficient acid catalysts. The oxides have orthorhombic structures with different extents of distortions and coordinatively unsaturated metal atoms. A strong dependence is observed between the type and strength of the acid sites and specific structural motifs. Ultrasmall niobium pentoxide nanoparticles, which have strong Brønsted acidity, as well as Lewis acidity, give product yields of 96% (3 h, 140 °C, 100% conversion), 85% (3 h, 140 °C, 86% conversion), and 100% (3 h, 110 °C, 100% conversion) in the reactions of furfuryl alcohol, 5-(hydroxymethyl)furfural, and α-angelica lactone with ethanol, respectively.
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17
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Tran SBT, Choi H, Oh S, Park JY. Defective Nb2O5-supported Pt catalysts for CO oxidation: Promoting catalytic activity via oxygen vacancy engineering. J Catal 2019. [DOI: 10.1016/j.jcat.2019.05.017] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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18
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Leal GF, Lima S, Graça I, Carrer H, Barrett DH, Teixeira-Neto E, Curvelo AAS, Rodella CB, Rinaldi R. Design of Nickel Supported on Water-Tolerant Nb 2O 5 Catalysts for the Hydrotreating of Lignin Streams Obtained from Lignin-First Biorefining. iScience 2019; 15:467-488. [PMID: 31125909 PMCID: PMC6532020 DOI: 10.1016/j.isci.2019.05.007] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 04/29/2019] [Accepted: 05/05/2019] [Indexed: 11/06/2022] Open
Abstract
In biomass conversion, Nb2O5 has attracted increasing attention as a catalyst support presenting water-tolerant Lewis acid sites. Herein, we address the design of Ni/Nb2O5 catalysts for hydrotreating of lignin to hydrocarbons. To optimize the balance between acidic and hydrogenating properties, the catalysts were first evaluated in the hydrotreating of diphenyl ether. The best catalyst candidate was further explored in the conversion of lignin oil obtained by catalytic upstream biorefining of poplar. As primary products, cycloalkanes were obtained, demonstrating the potential of Ni/Nb2O5 catalysts for the lignin-to-fuels route. However, the Lewis acidity of Nb2O5 also catalyzes coke formation via lignin species condensation. Thereby, an acidity threshold should be found so that dehydration reactions essential to the hydrotreatment are not affected, but the condensation of lignin species prevented. This article provides a critical "beginning-to-end" analysis of aspects crucial to the catalyst design to produce lignin biofuels.
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Affiliation(s)
- Glauco F Leal
- Department of Chemical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK; Department of Physical Chemistry, Institute of Chemistry of São Carlos, University of São Paulo, Av. Trabalhador São Carlense, 400, São Carlos, São Paulo 13566-590, Brazil; Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, São Paulo 13083-970, Brazil
| | - Sérgio Lima
- Department of Chemical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
| | - Inês Graça
- Department of Chemical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
| | - Heloise Carrer
- Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, São Paulo 13083-970, Brazil
| | - Dean H Barrett
- Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, São Paulo 13083-970, Brazil; School of Chemistry, University of the Witwatersrand, Johannesburg, South Africa
| | - Erico Teixeira-Neto
- Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, São Paulo 13083-970, Brazil
| | - Antonio Aprigio S Curvelo
- Department of Physical Chemistry, Institute of Chemistry of São Carlos, University of São Paulo, Av. Trabalhador São Carlense, 400, São Carlos, São Paulo 13566-590, Brazil
| | - Cristiane B Rodella
- Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, São Paulo 13083-970, Brazil
| | - Roberto Rinaldi
- Department of Chemical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK.
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19
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Siddiki SMAH, Rashed MN, Ali MA, Toyao T, Hirunsit P, Ehara M, Shimizu K. Lewis Acid Catalysis of Nb
2
O
5
for Reactions of Carboxylic Acid Derivatives in the Presence of Basic Inhibitors. ChemCatChem 2018. [DOI: 10.1002/cctc.201801239] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
| | | | - Md. Ayub Ali
- Department of Chemistry Bangladesh University of Engineering and Technology (BUET) Dhaka- 1000 Bangladesh
| | - Takashi Toyao
- Institute for Catalysis Hokkaido University Sapporo 001-0021 Japan
- Elements Strategy Initiative for Catalysts and Batteries Kyoto University Kyoto 615-8520 Japan
| | - Pussana Hirunsit
- National Nanotechnology Center National Science and Technology Development Agency Pathum Thani 12120 Thailand
| | - Masahiro Ehara
- Elements Strategy Initiative for Catalysts and Batteries Kyoto University Kyoto 615-8520 Japan
- Institute for Molecular Science Aichi 444-8585 Japan
| | - Ken‐ichi Shimizu
- Institute for Catalysis Hokkaido University Sapporo 001-0021 Japan
- Elements Strategy Initiative for Catalysts and Batteries Kyoto University Kyoto 615-8520 Japan
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20
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Jaramillo-Páez C, Sánchez-Fernández F, Navío J, Hidalgo M. Photo-induced processes on Nb 2 O 5 synthesized by different procedures. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.03.040] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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21
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Kollender JP, Mardare CC, Mardare AI, Hassel AW. Downstream analytics quantification of ion release during high-voltage anodisation of niobium. J Solid State Electrochem 2018. [DOI: 10.1007/s10008-018-3957-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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22
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New Insights on the Oxidation of Unsaturated Fatty Acid Methyl Esters Catalyzed by Niobium(V) Oxide. A Study of the Catalyst Surface Reactivity. Catalysts 2018. [DOI: 10.3390/catal8010006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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23
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24
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Influence of the metallic content on Pt-Ir/Nb 2 O 5 catalysts for decalin selective ring opening. Catal Today 2017. [DOI: 10.1016/j.cattod.2016.10.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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25
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Pinto MB, Soares AL, Mella Orellana A, Duarte HA, De Abreu HA. Structural, Electronic, and Thermodynamic Properties of the T and B Phases of Niobia: First-Principle Calculations. J Phys Chem A 2017; 121:2399-2409. [PMID: 28291341 DOI: 10.1021/acs.jpca.6b11383] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Different polymorphs of Nb2O5 can be obtained depending on the pressure and temperature of calcination leading to different catalytic properties. Two polymorphs of niobia, T-Nb2O5 and B-Nb2O5, have been investigated by means of density functional/plane waves method. The equation of state predicted that B-Nb2O5 phase is more stable than the T-Nb2O5 at low temperature; however at high pressure both phases are stable. These results are in good agreement with the available experimental data. The calculated cohesive energies of 6.63 and 6.59 eV·atom-1 for the B-Nb2O5 and T-Nb2O5, respectively, also corroborate this conclusion, and it can be compared to the experimental value of 9.56 eV atom-1 estimated for the most thermodynamically stable phase. The topological analyses based on quantum theory of atoms in molecules (QTAIM) and electron localization function (ELF) were applied and reveal bonds with large ionic character for both phases. The B-Nb2O5 presented larger stiffness than T-Nb2O5, and the oxygen sites in the T-Nb2O5 are more compressible. The density of states comparison for both structures indicates that B-Nb2O5 has lower concentration of acid sites compared to T-Nb2O5. This result is consistent with the experimental observations that the concentration of Lewis acid sites decreases with the temperature.
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Affiliation(s)
- Mirele B Pinto
- GPQIT, Departamento de Química, ICEx, Universidade Federal de Minas Gerais , Belo Horizonte 31270-901, MG, Brazil
| | - Antonio Lenito Soares
- GPQIT, Departamento de Química, ICEx, Universidade Federal de Minas Gerais , Belo Horizonte 31270-901, MG, Brazil
| | - Andy Mella Orellana
- Departamento de Física, Facultad de Ciencias, Universidad de Chile , Santiago, Chile
| | - Hélio A Duarte
- GPQIT, Departamento de Química, ICEx, Universidade Federal de Minas Gerais , Belo Horizonte 31270-901, MG, Brazil
| | - Heitor A De Abreu
- GPQIT, Departamento de Química, ICEx, Universidade Federal de Minas Gerais , Belo Horizonte 31270-901, MG, Brazil
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26
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Rao BS, Kumari PK, Dhanalakshmi D, Lingaiah N. Selective conversion of furfuryl alcohol into butyl levulinate over zinc exchanged heteropoly tungstate supported on niobia catalysts. MOLECULAR CATALYSIS 2017. [DOI: 10.1016/j.molcata.2016.11.032] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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27
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Griffith KJ, Forse AC, Griffin JM, Grey CP. High-Rate Intercalation without Nanostructuring in Metastable Nb2O5 Bronze Phases. J Am Chem Soc 2016; 138:8888-99. [PMID: 27264849 DOI: 10.1021/jacs.6b04345] [Citation(s) in RCA: 109] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Nanostructuring and nanosizing have been widely employed to increase the rate capability in a variety of energy storage materials. While nanoprocessing is required for many materials, we show here that both the capacity and rate performance of low-temperature bronze-phase TT- and T-polymorphs of Nb2O5 are inherent properties of the bulk crystal structure. Their unique "room-and-pillar" NbO6/NbO7 framework structure provides a stable host for lithium intercalation; bond valence sum mapping exposes the degenerate diffusion pathways in the sites (rooms) surrounding the oxygen pillars of this complex structure. Electrochemical analysis of thick films of micrometer-sized, insulating niobia particles indicates that the capacity of the T-phase, measured over a fixed potential window, is limited only by the Ohmic drop up to at least 60C (12.1 A·g(-1)), while the higher temperature (Wadsley-Roth, crystallographic shear structure) H-phase shows high intercalation capacity (>200 mA·h·g(-1)) but only at moderate rates. High-resolution (6/7)Li solid-state nuclear magnetic resonance (NMR) spectroscopy of T-Nb2O5 revealed two distinct spin reservoirs, a small initial rigid population and a majority-component mobile distribution of lithium. Variable-temperature NMR showed lithium dynamics for the majority lithium characterized by very low activation energies of 58(2)-98(1) meV. The fast rate, high density, good gravimetric capacity, excellent capacity retention, and safety features of bulk, insulating Nb2O5 synthesized in a single step at relatively low temperatures suggest that this material not only is structurally and electronically exceptional but merits consideration for a range of further applications. In addition, the realization of high rate performance without nanostructuring in a complex insulating oxide expands the field for battery material exploration beyond conventional strategies and structural motifs.
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Affiliation(s)
- Kent J Griffith
- Department of Chemistry, University of Cambridge , Cambridge CB2 1EW, U.K
| | - Alexander C Forse
- Department of Chemistry, University of Cambridge , Cambridge CB2 1EW, U.K
| | - John M Griffin
- Department of Chemistry, University of Cambridge , Cambridge CB2 1EW, U.K
| | - Clare P Grey
- Department of Chemistry, University of Cambridge , Cambridge CB2 1EW, U.K
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28
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Xu X, Liu F, Han X, Wu Y, Liu W, Zhang R, Zhang N, Wang X. Elucidating the promotional effects of niobia on SnO2 for CO oxidation: developing an XRD extrapolation method to measure the lattice capacity of solid solutions. Catal Sci Technol 2016. [DOI: 10.1039/c5cy01870f] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Using an XRD extrapolation method, the SnO2 lattice capacity for Nb2O5 is quantified. A Sn–Nb solid solution without excess Nb2O5 is promising for CO oxidation.
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Affiliation(s)
- Xianglan Xu
- Institute of Applied Chemistry
- College of Chemistry
- Nanchang University
- Nanchang
- PR China
| | - Fang Liu
- Institute of Applied Chemistry
- College of Chemistry
- Nanchang University
- Nanchang
- PR China
| | - Xue Han
- Institute of Applied Chemistry
- College of Chemistry
- Nanchang University
- Nanchang
- PR China
| | - Yuanyuan Wu
- Institute of Applied Chemistry
- College of Chemistry
- Nanchang University
- Nanchang
- PR China
| | - Wenming Liu
- Institute of Applied Chemistry
- College of Chemistry
- Nanchang University
- Nanchang
- PR China
| | - Rongbin Zhang
- Institute of Applied Chemistry
- College of Chemistry
- Nanchang University
- Nanchang
- PR China
| | - Ning Zhang
- Institute of Applied Chemistry
- College of Chemistry
- Nanchang University
- Nanchang
- PR China
| | - Xiang Wang
- Institute of Applied Chemistry
- College of Chemistry
- Nanchang University
- Nanchang
- PR China
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29
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Lim E, Jo C, Kim H, Kim MH, Mun Y, Chun J, Ye Y, Hwang J, Ha KS, Roh KC, Kang K, Yoon S, Lee J. Facile Synthesis of Nb2O5@Carbon Core-Shell Nanocrystals with Controlled Crystalline Structure for High-Power Anodes in Hybrid Supercapacitors. ACS NANO 2015; 9:7497-505. [PMID: 26095456 DOI: 10.1021/acsnano.5b02601] [Citation(s) in RCA: 142] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Hybrid supercapacitors (battery-supercapacitor hybrid devices, HSCs) deliver high energy within seconds (excellent rate capability) with stable cyclability. One of the key limitations in developing high-performance HSCs is imbalance in power capability between the sluggish Faradaic lithium-intercalation anode and rapid non-Faradaic capacitive cathode. To solve this problem, we synthesize Nb2O5@carbon core-shell nanocyrstals (Nb2O5@C NCs) as high-power anode materials with controlled crystalline phases (orthorhombic (T) and pseudohexagonal (TT)) via a facile one-pot synthesis method based on a water-in-oil microemulsion system. The synthesis of ideal T-Nb2O5 for fast Li(+) diffusion is simply achieved by controlling the microemulsion parameter (e.g., pH control). The T-Nb2O5@C NCs shows a reversible specific capacity of ∼180 mA h g(-1) at 0.05 A g(-1) (1.1-3.0 V vs Li/Li(+)) with rapid rate capability compared to that of TT-Nb2O5@C and carbon shell-free Nb2O5 NCs, mainly due to synergistic effects of (i) the structural merit of T-Nb2O5 and (ii) the conductive carbon shell for high electron mobility. The highest energy (∼63 W h kg(-1)) and power (16 528 W kg(-1) achieved at ∼5 W h kg(-1)) densities within the voltage range of 1.0-3.5 V of the HSC using T-Nb2O5@C anode and MSP-20 cathode are remarkable.
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Affiliation(s)
- Eunho Lim
- †School of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Kyungbuk 790-784, Republic of Korea
| | - Changshin Jo
- ‡Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Kyungbuk 790-784, Republic of Korea
| | - Haegyeom Kim
- §Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, 599 Gwanak-Ro, Gwanak-Gu, Seoul 151-742, Republic of Korea
| | - Mok-Hwa Kim
- ∥Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology (KICET), 101 Soho-Ro, Jinju, Gyeongnam 660-031, Republic of Korea
| | - Yeongdong Mun
- ‡Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Kyungbuk 790-784, Republic of Korea
| | - Jinyoung Chun
- ‡Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Kyungbuk 790-784, Republic of Korea
| | - Youngjin Ye
- ‡Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Kyungbuk 790-784, Republic of Korea
| | - Jongkook Hwang
- ‡Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Kyungbuk 790-784, Republic of Korea
| | - Kyoung-Su Ha
- ⊥Department of Chemical and Biomolecular Engineering, Sogang University, 35 Baekbeom-Ro, Mapo-Gu, Seoul 121-742, Republic of Korea
| | - Kwang Chul Roh
- ∥Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology (KICET), 101 Soho-Ro, Jinju, Gyeongnam 660-031, Republic of Korea
| | - Kisuk Kang
- §Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, 599 Gwanak-Ro, Gwanak-Gu, Seoul 151-742, Republic of Korea
- ¤Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul National University, Seoul 151-742, Republic of Korea
| | - Songhun Yoon
- #Department of Integrative Engineering, Chung-Ang University, 221, Heukseok-Dong, Dongjak-Gu, Seoul 156-756, Republic of Korea
| | - Jinwoo Lee
- †School of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Kyungbuk 790-784, Republic of Korea
- ‡Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Kyungbuk 790-784, Republic of Korea
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30
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Ngee ELS, Gao Y, Chen X, Lee TM, Hu Z, Zhao D, Yan N. Sulfated Mesoporous Niobium Oxide Catalyzed 5-Hydroxymethylfurfural Formation from Sugars. Ind Eng Chem Res 2014. [DOI: 10.1021/ie501980t] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Ernest Lau Sze Ngee
- Department of Chemical
and
Biomolecular Engineering, National University of Singapore, 4 Engineering
Drive 4, 117585 Singapore
| | - Yongjun Gao
- Department of Chemical
and
Biomolecular Engineering, National University of Singapore, 4 Engineering
Drive 4, 117585 Singapore
| | - Xi Chen
- Department of Chemical
and
Biomolecular Engineering, National University of Singapore, 4 Engineering
Drive 4, 117585 Singapore
| | - Timothy Misso Lee
- Department of Chemical
and
Biomolecular Engineering, National University of Singapore, 4 Engineering
Drive 4, 117585 Singapore
| | - Zhigang Hu
- Department of Chemical
and
Biomolecular Engineering, National University of Singapore, 4 Engineering
Drive 4, 117585 Singapore
| | - Dan Zhao
- Department of Chemical
and
Biomolecular Engineering, National University of Singapore, 4 Engineering
Drive 4, 117585 Singapore
| | - Ning Yan
- Department of Chemical
and
Biomolecular Engineering, National University of Singapore, 4 Engineering
Drive 4, 117585 Singapore
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31
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Luisa Marin M, Hallett-Tapley GL, Impellizzeri S, Fasciani C, Simoncelli S, Netto-Ferreira JC, Scaiano JC. Synthesis, acid properties and catalysis by niobium oxide nanostructured materials. Catal Sci Technol 2014. [DOI: 10.1039/c4cy00238e] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Vapor Phase Dehydration of Glycerol to Acrolein Over Phosphotungstic Acid Catalyst Supported on Niobia. Catal Letters 2014. [DOI: 10.1007/s10562-014-1204-x] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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33
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Facile synthesis and unique photocatalytic property of niobium pentoxide hollow spheres and the high optoelectronic performance of their nanofilm. J Colloid Interface Sci 2013; 411:220-9. [DOI: 10.1016/j.jcis.2013.08.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2013] [Revised: 08/07/2013] [Accepted: 08/14/2013] [Indexed: 11/22/2022]
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34
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Anilkumar M, Hoelderich W. New non-zeolitic Nb-based catalysts for the gas-phase Beckmann rearrangement of cyclohexanone oxime to caprolactam. J Catal 2012. [DOI: 10.1016/j.jcat.2012.06.007] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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35
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Furukawa S, Shishido T, Teramura K, Tanaka T. Photocatalytic Oxidation of Alcohols over TiO2 Covered with Nb2O5. ACS Catal 2011. [DOI: 10.1021/cs2005554] [Citation(s) in RCA: 117] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shinya Furukawa
- Department of Molecular Engineering, Graduate School
of Engineering, Kyoto University, Kyoto
615-8510, Japan
| | - Tetsuya Shishido
- Department of Molecular Engineering, Graduate School
of Engineering, Kyoto University, Kyoto
615-8510, Japan
| | - Kentaro Teramura
- Department of Molecular Engineering, Graduate School
of Engineering, Kyoto University, Kyoto
615-8510, Japan
| | - Tsunehiro Tanaka
- Department of Molecular Engineering, Graduate School
of Engineering, Kyoto University, Kyoto
615-8510, Japan
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36
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Radhakrishnan R, Wu J, Jaenicke S, Chuah GK. Effects of Acidity and Pore Size Constraints on Supported Niobium Oxide Catalysts for the Selective Formation of Glycerol Monolaurate. ChemCatChem 2011. [DOI: 10.1002/cctc.201000300] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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37
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Chary KV, Srikanth CS, Venkat Rao V. Characterization and reactivity of Nb2O5 supported Ru catalysts. CATAL COMMUN 2009. [DOI: 10.1016/j.catcom.2008.10.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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38
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Esterification of acetic acid with alcohols using supported niobium pentoxide on silica–alumina catalysts. Catal Today 2008. [DOI: 10.1016/j.cattod.2007.12.091] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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39
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Chernyshkova FA. Niobic acid — a new heterogeneous catalyst for processes in petrochemical and organic syntheses. RUSSIAN CHEMICAL REVIEWS 2007. [DOI: 10.1070/rc1993v062n08abeh000044] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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40
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Maia MP, Rodrigues MA, Passos FB. Nitrate catalytic reduction in water using niobia supported palladium–copper catalysts. Catal Today 2007. [DOI: 10.1016/j.cattod.2007.01.051] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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41
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Paiva Jr JBD, Monteiro WR, Zacharias MA, Rodrigues JAJ, Cortez GG. Characterization and catalytic behavior of MoO3/V2O5/Nb2 O5 systems in isopropanol decomposition. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2006. [DOI: 10.1590/s0104-66322006000400009] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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42
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Single Source Molecular Precursors to Niobia–Silica and Niobium Phosphate Materials. MONATSHEFTE FUR CHEMIE 2006. [DOI: 10.1007/s00706-006-0445-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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43
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Rosario AV, Pereira EC. Influence of the crystallinity on the Li+ intercalation process in Nb2O5 films. J Solid State Electrochem 2005. [DOI: 10.1007/s10008-004-0637-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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44
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Chary KV, Reddy KR, Kumar CP, Naresh D, Rao VV, Mestl G. Characterization and reactivity of molybdenum oxide catalysts supported on Nb2O5–TiO2. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.molcata.2004.01.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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45
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Chary KV, Lakshmi KS, Rao PVR, Rao KSR, Papadaki M. Characterization and catalytic properties of niobia supported nickel catalysts in the hydrodechlorination of 1,2,4-trichlorobenzene. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.molcata.2003.09.049] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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46
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Chary KVR, Seela KK, Sagar GV, Sreedhar B. Characterization and Reactivity of Niobia Supported Copper Oxide Catalysts. J Phys Chem B 2003. [DOI: 10.1021/jp035738s] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Komandur V. R. Chary
- Catalysis Division, Indian Institute of Chemical Technology, Hyderabad-500 007, India
| | | | - Guggilla Vidya Sagar
- Catalysis Division, Indian Institute of Chemical Technology, Hyderabad-500 007, India
| | - Bojja Sreedhar
- Catalysis Division, Indian Institute of Chemical Technology, Hyderabad-500 007, India
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Yu Ko HY, Mizuhata M, Kajinami A, Deki S. Preparation of Au nanoparticle dispersed Nb2O5 composite film by liquid phase deposition. J Electroanal Chem (Lausanne) 2003. [DOI: 10.1016/s0022-0728(03)00089-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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48
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Chary KV, Sri Lakshmi K, Murthy MR, Seetha Rama Rao K, Papadaki M. Hydrodechlorination of 1,2,4-trichlorobenzene over niobia supported nickel catalysts. CATAL COMMUN 2003. [DOI: 10.1016/j.catcom.2003.08.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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49
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Fabrication of high performance thin films from metal fluorocomplex aqueous solution by the liquid phase deposition. J Fluor Chem 2003. [DOI: 10.1016/s0022-1139(02)00325-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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50
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