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Koohfar S, Ghasemi M, Hafen T, Dimitrakopoulos G, Kim D, Pike J, Elangovan S, Gomez ED, Yildiz B. Improvement of oxygen reduction activity and stability on a perovskite oxide surface by electrochemical potential. Nat Commun 2023; 14:7203. [PMID: 37938236 PMCID: PMC10632449 DOI: 10.1038/s41467-023-42462-5] [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: 04/05/2023] [Accepted: 10/11/2023] [Indexed: 11/09/2023] Open
Abstract
The instability of the surface chemistry in transition metal oxide perovskites is the main factor hindering the long-term durability of oxygen electrodes in solid oxide electrochemical cells. The instability of surface chemistry is mainly due to the segregation of A-site dopants from the lattice to the surface. Here we report that cathodic potential can remarkably improve the stability in oxygen reduction reaction and electrochemical activity, by decomposing the near-surface region of the perovskite phase in a porous electrode made of La1-xSrxCo1-xFexO3 mixed with Sm0.2Ce0.8O1.9. Our approach combines X-ray photoelectron spectroscopy and secondary ion mass spectrometry for surface and sub-surface analysis. Formation of Ruddlesden-Popper phase is accompanied by suppression of the A-site dopant segregation, and exsolution of catalytically active Co particles onto the surface. These findings reveal the chemical and structural elements that maintain an active surface for oxygen reduction, and the cathodic potential is one way to generate these desirable chemistries.
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Affiliation(s)
- Sanaz Koohfar
- Laboratory for Electrochemical Interfaces, Massachusetts Institute of Technology, Cambridge, MA, USA
- Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Masoud Ghasemi
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA, USA
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA, USA
| | | | - Georgios Dimitrakopoulos
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Dongha Kim
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Jenna Pike
- OxEon Energy, LLC, North Salt Lake, UT, USA
| | | | - Enrique D Gomez
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA, USA
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA, USA
| | - Bilge Yildiz
- Laboratory for Electrochemical Interfaces, Massachusetts Institute of Technology, Cambridge, MA, USA.
- Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.
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Mura F, Cognigni F, Ferroni M, Morandi V, Rossi M. Advances in Focused Ion Beam Tomography for Three-Dimensional Characterization in Materials Science. MATERIALS (BASEL, SWITZERLAND) 2023; 16:5808. [PMID: 37687502 PMCID: PMC10488958 DOI: 10.3390/ma16175808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 08/10/2023] [Accepted: 08/11/2023] [Indexed: 09/10/2023]
Abstract
Over the years, FIB-SEM tomography has become an extremely important technique for the three-dimensional reconstruction of microscopic structures with nanometric resolution. This paper describes in detail the steps required to perform this analysis, from the experimental setup to the data analysis and final reconstruction. To demonstrate the versatility of the technique, a comprehensive list of applications is also summarized, ranging from batteries to shale rocks and even some types of soft materials. Moreover, the continuous technological development, such as the introduction of the latest models of plasma and cryo-FIB, can open the way towards the analysis with this technique of a large class of soft materials, while the introduction of new machine learning and deep learning systems will not only improve the resolution and the quality of the final data, but also expand the degree of automation and efficiency in the dataset handling. These future developments, combined with a technique that is already reliable and widely used in various fields of research, are certain to become a routine tool in electron microscopy and material characterization.
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Affiliation(s)
- Francesco Mura
- Department of Basic and Applied Sciences, University of Rome “La Sapienza”, Via Antonio Scarpa 14, 00161 Rome, Italy; (F.C.); (M.R.)
| | - Flavio Cognigni
- Department of Basic and Applied Sciences, University of Rome “La Sapienza”, Via Antonio Scarpa 14, 00161 Rome, Italy; (F.C.); (M.R.)
| | - Matteo Ferroni
- National Research Council of Italy, Institute for Microelectronics and Microsystems, Section of Bologna, Via Piero Gobetti 101, 40129 Bologna, Italy; (M.F.); (V.M.)
- Department of Civil, Environmental, Architectural Engineering and Mathematics (DICATAM), University of Brescia, Via Branze 43, 25123 Brescia, Italy
| | - Vittorio Morandi
- National Research Council of Italy, Institute for Microelectronics and Microsystems, Section of Bologna, Via Piero Gobetti 101, 40129 Bologna, Italy; (M.F.); (V.M.)
| | - Marco Rossi
- Department of Basic and Applied Sciences, University of Rome “La Sapienza”, Via Antonio Scarpa 14, 00161 Rome, Italy; (F.C.); (M.R.)
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Araújo AJ, Loureiro FJ, Grilo JP, Macedo DA, Paskocimas CA, Fagg DP. Changing the oxygen reaction mechanism in composite electrodes by the addition of ionic- or ambipolar-conducting phases: Series or parallel pathways. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140383] [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]
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Olivo A, Beyribey B, Kim H, Persky J. Cobalt oxide enhanced lanthanum strontium cobalt ferrite electrode for solid oxide fuel cells. MAIN GROUP CHEMISTRY 2021. [DOI: 10.3233/mgc-210114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
A Co3O4 enhanced La0.8Sr0.2Co0.5Fe0.5O3 - δ (LSCF) electrode is developed for use in air electrodes with proton conducting solid oxide fuel cell (SOFC). The incipient wetness impregnation method enables Co3O4 nanoparticles on the LSCF surface without altering the bulk porosity of the LSCF electrode. The polarization resistance of LSCF electrodes is significantly reduced by Co3O4 doping, and both charge transfer and diffusion/conversion resistances were positively affected. The highest reduction in charge transfer resistance is obtained at 700 °C, which is increased from 21%to 32%through reduction of po 2. Conversely, the highest reduction in diffusion/conversion resistance is achieved at 550 °C. By increasing po 2, the reduction is increased from 57%to 66%and its activation energy is reduced up to 33 %compared to pure LSCF. The lowest total area specific resistances obtained under air are 1.45 Ω·cm2, 2.95 Ω·cm2, 6.75 Ω·cm2 and 16.45 Ω·cm2 at 700 °C, 650 °C, 600 °C and 550 °C, respectively.
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Affiliation(s)
- Alberto Olivo
- Low Emissions Resources Global Ltd., Mid CraigieIndustrial Estate, Dundee, DD4 7RH, UK
| | - Berceste Beyribey
- Low Emissions Resources Global Ltd., Mid CraigieIndustrial Estate, Dundee, DD4 7RH, UK
| | - Hwan Kim
- Low Emissions Resources Global Ltd., Mid CraigieIndustrial Estate, Dundee, DD4 7RH, UK
| | - Joshua Persky
- Low Emissions Resources Global Ltd., Mid CraigieIndustrial Estate, Dundee, DD4 7RH, UK
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McPhail SJ, Frangini S, Laurencin J, Effori E, Abaza A, Padinjarethil AK, Hagen A, Léon A, Brisse A, Vladikova D, Burdin B, Bianchi FR, Bosio B, Piccardo P, Spotorno R, Uchida H, Polverino P, Adinolfi EA, Postiglione F, Lee J, Moussaoui H, Van herle J. Addressing planar solid oxide cell degradation mechanisms: A critical review of selected components. ELECTROCHEMICAL SCIENCE ADVANCES 2021. [DOI: 10.1002/elsa.202100024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Affiliation(s)
- Stephen J. McPhail
- ENEA Agenzia Nazionale per le Nuove Tecnologie L'Energia e lo Sviluppo Economico Sostenibile Rome Italy
| | - Stefano Frangini
- ENEA Agenzia Nazionale per le Nuove Tecnologie L'Energia e lo Sviluppo Economico Sostenibile Rome Italy
| | | | - Elisa Effori
- Univ. Grenoble Alpes – CEA/LITEN Grenoble France
| | - Amira Abaza
- Univ. Grenoble Alpes – CEA/LITEN Grenoble France
| | | | - Anke Hagen
- DTU Energy Technical University of Denmark Kgs. Lyngby Denmark
| | - Aline Léon
- EIFER European Institute for Energy Research Karlsruhe Germany
| | | | - Daria Vladikova
- IEES Institute of Electrochemistry and Energy Systems Bulgarian Academy of Science Sofia Bulgaria
| | - Blagoy Burdin
- IEES Institute of Electrochemistry and Energy Systems Bulgarian Academy of Science Sofia Bulgaria
| | - Fiammetta Rita Bianchi
- Department of Civil Chemical and Environmental Engineering. University of Genoa Genova Italy
| | - Barbara Bosio
- Department of Civil Chemical and Environmental Engineering. University of Genoa Genova Italy
| | - Paolo Piccardo
- Department of Chemistry and Industrial Chemistry University of Genoa Genova Italy
| | - Roberto Spotorno
- Department of Chemistry and Industrial Chemistry University of Genoa Genova Italy
| | - Hiroyuki Uchida
- Clean Energy Research Center University of Yamanashi Kofu Japan
| | | | | | - Fabio Postiglione
- Department of Information and Electrical Engineering and Applied Mathematics (DEIM) University of Salerno Fisciano Italy
| | - Jong‐Ho Lee
- Korea Institute of Science and Technology (KIST) and University of Science and Technology (UST) Seoul Korea
| | - Hamza Moussaoui
- Ecole Polytechnique Fédérale de Lausanne (EPFL) Faculty of Engineering (STI) Inst. Mech. Eng (IGM) Group of Energy Materials (GEM) Sion Switzerland
| | - Jan Van herle
- Ecole Polytechnique Fédérale de Lausanne (EPFL) Faculty of Engineering (STI) Inst. Mech. Eng (IGM) Group of Energy Materials (GEM) Sion Switzerland
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Donazzi A, Cordaro G, Baricci A, Ding ZB, Maestri M. A detailed kinetic model for the reduction of oxygen on LSCF-GDC composite cathodes. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.135620] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Tezyk V, Rossignol C, Sergent N, Djurado E, Laurencin J, Siebert E. Cyclic voltammetry and high-frequency series resistance of La0.6Sr0.4Co0.2Fe0.8O3-δ electrode deposited on GDC: Effect of the electrode microstructure and the oxygen partial pressure. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.02.066] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Muhammed Ali SA, Anwar M, Mahmud LS, Kalib NS, Muchtar A, Somalu MR. Influence of current collecting and functional layer thickness on the performance stability of La0.6Sr0.4Co0.2Fe0.8O3-δ-Ce0.8Sm0.2O1.9 composite cathode. J Solid State Electrochem 2019. [DOI: 10.1007/s10008-019-04208-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Bernadet L, Laurencin J, Roux G, Montinaro D, Mauvy F, Reytier M. Effects of Pressure on High Temperature Steam and Carbon Dioxide Co-electrolysis. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.09.037] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Laurencin J, Hubert M, Sanchez DF, Pylypko S, Morales M, Morata A, Morel B, Montinaro D, Lefebvre-Joud F, Siebert E. Degradation mechanism of La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ /Gd 0.1 Ce 0.9 O 2-δ composite electrode operated under solid oxide electrolysis and fuel cell conditions. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.05.011] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Pan Z, Liu Q, Zhang L, Zhang X, Chan SH. Study of Activation Effect of Anodic Current on La0.6Sr0.4Co0.2Fe0.8O3−δ Air Electrode in Solid Oxide Electrolyzer Cell. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.05.058] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Bertei A, Arcolini G, Ouweltjes J, Wuillemin Z, Piccardo P, Nicolella C. PHYSICALLY-BASED DECONVOLUTION OF IMPEDANCE SPECTRA: INTERPRETATION, FITTING AND VALIDATION OF A NUMERICAL MODEL FOR LANTHANUM STRONTIUM COBALT FERRITE-BASED SOLID OXIDE FUEL CELLS. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.04.181] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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