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Fischer L, Ran K, Schmidt C, Neuhaus K, Baumann S, Behr P, Mayer J, Bouwmeester HJM, Nijmeijer A, Guillon O, Meulenberg WA. Role of Fe/Co Ratio in Dual Phase Ce 0.8Gd 0.2O 2-δ-Fe 3-xCo xO 4 Composites for Oxygen Separation. MEMBRANES 2023; 13:membranes13050482. [PMID: 37233543 DOI: 10.3390/membranes13050482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 04/20/2023] [Accepted: 04/26/2023] [Indexed: 05/27/2023]
Abstract
Dual-phase membranes are increasingly attracting attention as a solution for developing stable oxygen permeation membranes. Ce0.8Gd0.2O2-δ-Fe3-xCoxO4 (CGO-F(3-x)CxO) composites are one group of promising candidates. This study aims to understand the effect of the Fe/Co-ratio, i.e., x = 0, 1, 2, and 3 in Fe3-xCoxO4, on microstructure evolution and performance of the composite. The samples were prepared using the solid-state reactive sintering method (SSRS) to induce phase interactions, which determines the final composite microstructure. The Fe/Co ratio in the spinel structure was found to be a crucial factor in determining phase evolution, microstructure, and permeation of the material. Microstructure analysis showed that all iron-free composites had a dual-phase structure after sintering. In contrast, iron-containing composites formed additional phases with a spinel or garnet structure which likely contributed to electronic conductivity. The presence of both cations resulted in better performance than that of pure iron or cobalt oxides. This demonstrated that both types of cations were necessary to form a composite structure, which then allowed sufficient percolation of robust electronic and ionic conducting pathways. The maximum oxygen flux is jO2 = 0.16 and 0.11 mL/cm2·s at 1000 °C and 850 °C, respectively, of the 85CGO-FC2O composite, which is comparable oxygen permeation flux reported previously.
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Affiliation(s)
- Liudmila Fischer
- Institute of Energy and Climate Research IEK-1, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
- Faculty of Science and Technology, Inorganic Membranes, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Ke Ran
- Central Facility for Electron Microscopy GFE, RWTH Aachen University, 52074 Aachen, Germany
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons ER-C, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Christina Schmidt
- Institute of Energy and Climate Research IEK-12, Forschungszentrum Jülich GmbH Helmholtz-Institute Münster, 48149 Münster, Germany
| | - Kerstin Neuhaus
- Institute of Energy and Climate Research IEK-12, Forschungszentrum Jülich GmbH Helmholtz-Institute Münster, 48149 Münster, Germany
| | - Stefan Baumann
- Institute of Energy and Climate Research IEK-1, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Patrick Behr
- Institute of Energy and Climate Research IEK-1, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Joachim Mayer
- Central Facility for Electron Microscopy GFE, RWTH Aachen University, 52074 Aachen, Germany
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons ER-C, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Henny J M Bouwmeester
- Faculty of Science and Technology, Inorganic Membranes, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Arian Nijmeijer
- Faculty of Science and Technology, Inorganic Membranes, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Olivier Guillon
- Institute of Energy and Climate Research IEK-1, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
- Jülich Aachen Research Allianc JARA-Energy, 52425 Jülich, Germany
| | - Wilhelm A Meulenberg
- Institute of Energy and Climate Research IEK-1, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
- Faculty of Science and Technology, Inorganic Membranes, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
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Neuhaus K, Schmidt C, Fischer L, Meulenberg WA, Ran K, Mayer J, Baumann S. Measurement of polarization effects in dual-phase ceria-based oxygen permeation membranes using Kelvin probe force microscopy. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2021; 12:1380-1391. [PMID: 34987951 PMCID: PMC8685560 DOI: 10.3762/bjnano.12.102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Accepted: 12/07/2021] [Indexed: 06/14/2023]
Abstract
In this study, a dual phase composite (CSO-FC2O) consisting of 60 vol % Ce0.8Sm0.2O1.9 as oxygen-conductive phase and 40 vol % FeCo2O4 as electron-conductive phase was synthesized. TEM measurements showed a relatively pure dual-phase material with only minor amounts of a tertiary (Sm,Ce)(Fe,Co)O3 perovskite phase and isolated residues of a rock salt phase at the grain boundaries. The obtained material was used as a model to demonstrate that a combination of polarization relaxation measurements and Kelvin probe force microscopy (KPFM)-based mapping of the Volta potential before and after the end of polarization can be used to determine the chemical diffusion coefficient of the ceria component of the composite. The KPFM measurements were performed at room temperature and show diffusion coefficients in the range of 3 × 10-13 cm2·s-1, which is comparable to values measured for single-phase Gd-doped ceria thin films using the same method.
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Affiliation(s)
- Kerstin Neuhaus
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research 12, Helmholtz-Institute Münster: Ionics in Energy Storage, Corrensstr. 46, 48149 Münster, Germany
| | - Christina Schmidt
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research 12, Helmholtz-Institute Münster: Ionics in Energy Storage, Corrensstr. 46, 48149 Münster, Germany
| | - Liudmila Fischer
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, Materials Synthesis and Processing (IEK-1), Wilhelm-Johnen-Straße, 52452 Jülich, Germany
- Faculty of Science and Technology, Inorganic Membranes, University of Twente, 7500 AE Enschede, Netherlands
| | - Wilhelm Albert Meulenberg
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, Materials Synthesis and Processing (IEK-1), Wilhelm-Johnen-Straße, 52452 Jülich, Germany
- Faculty of Science and Technology, Inorganic Membranes, University of Twente, 7500 AE Enschede, Netherlands
| | - Ke Ran
- Central Facility for Electron Microscopy GFE, RWTH Aachen University, 52074 Aachen, Germany
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons ER-C, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Joachim Mayer
- Central Facility for Electron Microscopy GFE, RWTH Aachen University, 52074 Aachen, Germany
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons ER-C, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Stefan Baumann
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, Materials Synthesis and Processing (IEK-1), Wilhelm-Johnen-Straße, 52452 Jülich, Germany
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Shetgaonkar SS, Salkar AV, Morajkar PP. Advances in Electrochemical and Catalytic Performance of Nanostructured FeCo 2 O 4 and Its Composites. Chem Asian J 2021; 16:2871-2895. [PMID: 34375014 DOI: 10.1002/asia.202100654] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 08/08/2021] [Indexed: 11/06/2022]
Abstract
It is well established that the excessive and uncontrolled use of fossil fuels and organic chemicals have put a risk to the earth's environment and the life that sustains within it. Carbon-free, sustainable, alternative energy technologies have therefore become the prime focus of current research. Smart inorganic materials have emerged as the potential solution to suffice energy needs and remediate the organic pollutants discharged to the environment. One such promising, versatile material is FeCo2 O4 which has gained immense research interest in the present decade due to its high efficiency and performance in energy and environmental applications. Innovative material design strategies involving the interplay of nanostructured morphology, chemical composition, redox surface states, and defect engineering have significantly enhanced both electrochemical and catalytic properties of FeCo2 O4 . Therefore, this review article aims to provide the first-ever comprehensive account of the latest research and developments in design-synthesis strategies, characterization techniques, and applications of nanostructured FeCo2 O4 and its composites in various electrochemical as well as catalytic applications. A detailed account of the nanostructured FeCo2 O4 and its composites in various energy storage and conversion devices such as supercapacitors (SCs), batteries, and fuel cells has been presented. Furthermore, a special section has been devoted to highlight the role of FeCo2 O4 in enhancing the sluggish reaction kinetics of oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in water splitting application. This review also highlights the role of nanostructured FeCo2 O4 in photocatalytic waste water treatment, gas sensing, and dual-phase membrane technologies wherein FeCo2 O4 has demonstrated promising performance.
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Affiliation(s)
| | - Akshay V Salkar
- School of Chemical Sciences, Goa University, Taleigao Plateau, Goa, India
| | - Pranay P Morajkar
- School of Chemical Sciences, Goa University, Taleigao Plateau, Goa, India
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Zeng F, Baumann S, Malzbender J, Nijmeijer A, Winnubst L, Guillon O, Schwaiger R, Meulenberg WA. Enhancing oxygen permeation of solid-state reactive sintered Ce0.8Gd0.2O2--FeCo2O4 composite by optimizing the powder preparation method. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2021.119248] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Cai L, Zhu Y, Cao Z, Li W, Li H, Zhu X, Yang W. Non-noble metal catalysts coated on oxygen-permeable membrane reactors for hydrogen separation. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2019.117463] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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