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Guðmundsdóttir JB, Thoréton V, Jiang B, Pokle A, Vøllestad E, Haugsrud R, Polfus JM. Oxygen exchange kinetics of BaGd 0.3La 0.7Co 2O 6-δ with exsolved Co 3O 4 nanoparticles in dry and humid atmospheres. Phys Chem Chem Phys 2025; 27:8467-8477. [PMID: 40192743 DOI: 10.1039/d4cp04791e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/17/2025]
Abstract
The oxygen exchange kinetics of BaGd0.3La0.7Co2O6-δ were investigated with pulsed isotope exchange (PIE) measurements in dry and humid atmospheres in the temperature range 400-600 °C in 0.005-0.21 bar O2. Synchrotron X-ray diffraction and scanning transmission electron microscopy (STEM) revealed exsolved Co3O4 nanoparticles dispersed on the surfaces that may contribute to the catalytic activity of the material towards the oxygen exchange reactions. The obtained oxygen exchange rate was 4.45 × 10-3 mol m-2 s-1 at 600 °C in 0.21 bar O2 with an activation energy of 0.76 eV. The rate determining step of the exchange reaction was determined to be dissociative adsorption of oxygen in both dry and humid atmospheres based on the individual rates of dissociative adsorption and incorporation, as well as pO2 dependencies of the oxygen exchange rate of around 1. The effect of water on the oxygen exchange rate was found to be dependent on the oxygen partial pressure, decreasing the rate at 0.21 bar O2 and 600 °C by a factor of approx. 2, while increasing the rate at 0.02 bar and 0.005 bar O2 by a similar amount. In situ thermogravimetric analysis was used to characterise the oxygen non-stoichiometry of the material throughout the oxygen exchange measurements.
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Affiliation(s)
- Jónína B Guðmundsdóttir
- Department of Chemistry, Centre for Materials Science and Nanotechnology, University of Oslo, PO Box 1033 Blindern, N-0315 Oslo, Norway.
| | - Vincent Thoréton
- Department of Chemistry, Centre for Materials Science and Nanotechnology, University of Oslo, PO Box 1033 Blindern, N-0315 Oslo, Norway.
| | - Bo Jiang
- Department of Chemistry, Centre for Materials Science and Nanotechnology, University of Oslo, PO Box 1033 Blindern, N-0315 Oslo, Norway.
| | - Anuj Pokle
- Department of Physics, Centre for Materials Science and Nanotechnology, University of Oslo, PO Box 1033 Blindern, N-0315 Oslo, Norway
| | - Einar Vøllestad
- Department of Sustainable Energy Technology, SINTEF Industry, Oslo, Norway
| | - Reidar Haugsrud
- Department of Chemistry, Centre for Materials Science and Nanotechnology, University of Oslo, PO Box 1033 Blindern, N-0315 Oslo, Norway.
| | - Jonathan M Polfus
- Department of Chemistry, Centre for Materials Science and Nanotechnology, University of Oslo, PO Box 1033 Blindern, N-0315 Oslo, Norway.
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Petlund H, Faid A, Zhu J, Pokle A, Norby T, Sunde S, Chatzitakis A. Iron and Nickel Substituted Perovskite Cobaltites for Sustainable Oxygen Evolving Anodes in Alkaline Environment. CHEMSUSCHEM 2025; 18:e202401403. [PMID: 39297279 PMCID: PMC11912097 DOI: 10.1002/cssc.202401403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2024] [Revised: 08/29/2024] [Indexed: 11/05/2024]
Abstract
Perovskite oxides have great flexibility in their elemental composition, which is accompanied by large adjustability in their electronic properties. Herein, we synthesized twelve perovskite oxide-based catalysts for the oxygen evolution reaction (OER) in alkaline media. The catalysts are based on the parent oxide perovskite Ba0.5Gd0.8La0.7Co2O6-δ (BGLC587) and are synthesized through the sol-gel citrate synthesis route. To reduce the demand on cobalt (Co), but also increase the intrinsic catalytic activity of BGLC587 for the OER, we substitute Co on the B-site with certain amounts of Fe and Ni, synthesizing catalysts of the general formula Ba0.5Gd0.8La0.7Co2-x-yFexNiyO6-δ. A plethora of physicochemical and electrochemical methods suggest that an Fe content between 30 % and 70 % increases the intrinsic catalytic activity of BGLC587, while Tafel slopes in combination with in-situ Raman spectroscopy suggest the rate determining step is likely a proton-exchange reaction, progressing possibly through the lattice oxygen mechanism (LOM). We apply one of the optimized, Co-substituted perovskites in a monolithic, photovoltaic (PV)-driven electrolysis cell and we achieve an initial solar-to-hydrogen (STH) conversion efficiency of 10.5 % under one sun solar simulated illumination.
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Affiliation(s)
- Henrik Petlund
- Department of Chemistry, Centre for Materials Science and Nanotechnology, University of Oslo, Gaustadalléen 21, NO-0349, Oslo, Norway
| | - Alaa Faid
- Department of Materials Science and Engineering, Norwegian University of Science and Technology (NTNU), NO-7491, Trondheim, Norway
| | - Junjie Zhu
- Institute for Energy Technology (IFE), NO-2007, Kjeller, Norway
| | - Anuj Pokle
- Department of Physics, Centre for Materials Science and Nanotechnology, University of Oslo, POB 1048, NO-0316, Oslo, Norway
| | - Truls Norby
- Department of Chemistry, Centre for Materials Science and Nanotechnology, University of Oslo, Gaustadalléen 21, NO-0349, Oslo, Norway
| | - Svein Sunde
- Department of Materials Science and Engineering, Norwegian University of Science and Technology (NTNU), NO-7491, Trondheim, Norway
| | - Athanasios Chatzitakis
- Department of Chemistry, Centre for Materials Science and Nanotechnology, University of Oslo, Gaustadalléen 21, NO-0349, Oslo, Norway
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Vilanova A, Dias P, Lopes T, Mendes A. The route for commercial photoelectrochemical water splitting: a review of large-area devices and key upscaling challenges. Chem Soc Rev 2024; 53:2388-2434. [PMID: 38288870 DOI: 10.1039/d1cs01069g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2024]
Abstract
Green-hydrogen is considered a "key player" in the energy market for the upcoming decades. Among currently available hydrogen (H2) production processes, photoelectrochemical (PEC) water splitting has one of the lowest environmental impacts. However, it still presents prohibitively high production costs compared to more mature technologies, such as steam methane reforming. Therefore, the competitiveness of PEC water splitting must rely on its environmental and functional advantages, which are strongly linked to the reactor design, to the intrinsic properties of its components, and to their successful upscaling. This review gives special attention to the engineering aspects and categorizes PEC devices into four main types, according to the configuration of electrodes and strategies for gas separation: wired back-to-back, wireless back-to-back, wired side-by-side, and wired separated electrode membrane-free. Independently of the device architecture, the use of concentrated sunlight was found to be mandatory for achieving competitive green-H2 production. Additionally, feasible strategies for upscaling the key components of PEC devices, especially photoelectrodes, are urgently needed. In a pragmatic context, the way to move forward is to accept that PEC devices will operate close to their thermodynamic limits at large-scale, which requires a solid convergence between academics and industry. Research efforts must be redirected to: (i) build and demonstrate modular devices with a low-cost and highly recyclable embodiment; (ii) optimize thermal and power management; (iii) reduce ohmic losses; (iv) enhance the chemical stability towards a thousand hours; (v) couple solar concentrators with PEC devices; (vi) boost PEC-H2 production through the use of organic compounds; and (vii) reach consensual standardized methods for evaluating PEC devices, at both environmental and techno-economic levels. If these targets are not met in the next few years, the feasibility of PEC-H2 production and its acceptance by industry and by the general public will be seriously compromised.
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Affiliation(s)
- António Vilanova
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.
- INL - International Iberian Nanotechnology Laboratory, Avenida Mestre José Veiga, 4715-330, Braga, Portugal
| | - Paula Dias
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.
| | - Tânia Lopes
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.
| | - Adélio Mendes
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.
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Shinde KP, Chavan HS, Salunke AS, Oh J, Aqueel Ahmed AT, Shrestha NK, Im H, Park J, Inamdar AI. Electrochemical Investigations of Double Perovskite M 2NiMnO 6 (Where M = Eu, Gd, Tb) for High-Performance Oxygen Evolution Reaction. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:3076. [PMID: 38063772 PMCID: PMC10707741 DOI: 10.3390/nano13233076] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 11/29/2023] [Accepted: 12/01/2023] [Indexed: 06/21/2024]
Abstract
Double perovskites are known for their special structures which can be utilized as catalyst electrode materials for electrochemical water splitting to generate carbon-neutral hydrogen energy. In this work, we prepared lanthanide series metal-doped double perovskites at the M site such as M2NiMnO6 (where M = Eu, Gd, Tb) using the solid-state reaction method, and they were investigated for an oxygen evolution reaction (OER) study in an alkaline medium. It is revealed that the catalyst with a configuration of Tb2NiMnO6 has outstanding OER properties such as a low overpotential of 288 mV to achieve a current density of 10 mAcm-2, a lower Tafel slope of 38.76 mVdec-1, and a long cycling stability over 100 h of continuous operation. A-site doping causes an alteration in the oxidation or valence states of the NiMn cations, their porosity, and the oxygen vacancies. This is evidenced in terms of the Mn4+/Mn3+ ratio modifying electronic properties and the surface which facilitates the OER properties of the catalyst. This is discussed using electrochemical impedance spectroscopy (EIS) and electrochemical surface area (ECSA) of the catalysts. The proposed work is promising for the synthesis and utilization of future catalyst electrodes for high-performance electrochemical water splitting.
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Affiliation(s)
- Kiran P. Shinde
- Department of Materials Science and Engineering, Hanbat National University, Daejeon 34158, Republic of Korea
| | - Harish S. Chavan
- Department of Chemistry and Chemical Engineering, Inha University, 100 Inha-ro, Michuhol-gu, Incheon 22212, Republic of Korea
| | - Amol S. Salunke
- Division of Physics and Semiconductor Science, Dongguk University, Seoul 04620, Republic of Korea
| | - Jeongseok Oh
- Department of Materials Science and Engineering, Hanbat National University, Daejeon 34158, Republic of Korea
| | - Abu Talha Aqueel Ahmed
- Division of Physics and Semiconductor Science, Dongguk University, Seoul 04620, Republic of Korea
| | - Nabeen K. Shrestha
- Division of Physics and Semiconductor Science, Dongguk University, Seoul 04620, Republic of Korea
| | - Hyunsik Im
- Division of Physics and Semiconductor Science, Dongguk University, Seoul 04620, Republic of Korea
| | - Joonsik Park
- Department of Materials Science and Engineering, Hanbat National University, Daejeon 34158, Republic of Korea
| | - Akbar I. Inamdar
- Division of Physics and Semiconductor Science, Dongguk University, Seoul 04620, Republic of Korea
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Zaraq A, Orayech B, Igartua JM, El Bouari A, Gregory DH, Gesing TM. Crystallography at non-ambient conditions and physical properties of the synthesized double perovskites, Sr 2(Co 1-xFe x)TeO 6. Dalton Trans 2023; 52:4086-4102. [PMID: 36880967 DOI: 10.1039/d2dt03543j] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Polycrystalline double perovskite-type Sr2(Co1-xFex)TeO6 with various stoichiometric compositions (x = 0, 0.25, 0.5, 0.75, and 1) were synthesized by solid-state reactions in air. The crystal structures and phase transitions of this series at different temperature intervals were determined by X-ray powder diffraction, and from the obtained data the crystal structures were refined. It has been proven that for the compositions x = 0.25, 0.50, and 0.75, the phases crystallize at room temperature in the monoclinic space group I2/m. Down to 100 K, depending on the composition, these structures experience a phase transition from I2/m to P21/n. At high temperatures up to 1100 K their crystal structures show two further phase transitions. The first one is a first-order phase transition, from monoclinic I2/m to tetragonal I4/m, followed by a second-order phase transition to cubic Fm3̄m. Therefore, the phase transition sequence of this series detected at temperatures ranging from 100 K to 1100 K is P21/n → I2/m → I4/m → Fm3̄m. The temperature-dependent vibrational features of the octahedral sites were investigated by Raman spectroscopy, which furthermore complements the XRD results. A decrease in the phase-transition temperature with increasing iron content has been observed for these compounds. This fact is explained by the progressive diminishing of the distortion of the double-perovskite structure in this series. Using room-temperature Mössbauer spectroscopy, the presence of two iron sites is confirmed. The two different transition metal cations Co and Fe at the B sites allow exploring their effect on the optical band-gap.
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Affiliation(s)
- Asmaa Zaraq
- University of Bremen, Institute of Inorganic Chemistry and Crystallography, Bremen, Germany.
| | - Brahim Orayech
- Maxam, Technology Center Energetic Materials, Carretera N-623 km 28, 09141Quintanilla Sobresierra, Burgos, Spain
| | - Josu M Igartua
- Universidad del País Vasco/Euskal Herriko Unibertsitatea UPV/EHU: Leioa, Bizkaia, España
| | - Abdeslam El Bouari
- Laboratory of Physical-Chemistry, Materials and Catalysis, Department of Chemistry, Faculty of Sciences Ben M'Sik, University Hassan II of Casablanca, Casablanca, Morocco
| | - Duncan H Gregory
- WestCHEM School of Chemistry, University of Glasgow, Joseph Black Building, Glasgow G12 8QQ, UK
| | - Thorsten M Gesing
- University of Bremen, Institute of Inorganic Chemistry and Crystallography, Bremen, Germany. .,University of Bremen, MAPEX Center for Materials and Processes, Bremen, Germany
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Banerjee A, Awasthi MK, Maji P, Pal M, Aziz ST, Lahiri GK, Dutta A. Double Perovskite Oxides Bringing a Revelation in Oxygen Evolution Reaction Electrocatalyst Design. ChemElectroChem 2023. [DOI: 10.1002/celc.202201098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Anwesha Banerjee
- Chemistry Department Indian Institute of Technology Bombay Powai Mumbai 400076 India
| | | | - Pramathesh Maji
- Chemistry Department University of New Orleans New Orleans LA 70148 USA
| | - Manodip Pal
- Chemistry Department Indian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Sheikh Tarik Aziz
- Chemistry Department Indian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Goutam K. Lahiri
- Chemistry Department Indian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Arnab Dutta
- Chemistry Department Indian Institute of Technology Bombay Powai Mumbai 400076 India
- Interdisciplinary Program in Climate Studies Indian Institute of Technology Bombay Powai Mumbai 400076 India
- National Center of Excellence CCU Indian Institute of Technology Bombay Powai Mumbai 400076 India
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Lyu S, Younis MA, Liu Z, Zeng L, Peng X, Yang B, Li Z, Lei L, Hou Y. Rational design on photoelectrodes and devices to boost photoelectrochemical performance of solar-driven water splitting: a mini review. Front Chem Sci Eng 2022. [DOI: 10.1007/s11705-022-2148-0] [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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Sereda VV, Malyshkin DA, Ivanov IL, Tsvetkov DS, Zuev AY, Maignan A. Redox Thermochemistry, Thermodynamics, and Solar Energy Conversion and Storage Capability of Some Double Perovskite Cobaltites. Inorg Chem 2021; 60:18141-18153. [PMID: 34784207 DOI: 10.1021/acs.inorgchem.1c02746] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The oxygen nonstoichiometry, δ, and oxidation enthalpy, ΔHox, of double perovskites RBaCo2O6-δ (R = Sm or Eu) were simultaneously measured depending on the temperature and oxygen partial pressure, pO2. Theoretical equations for ΔHox(T, δ) and pO2(T, δ) were derived from the defect structure model based on the oxygen exchange and cobalt disproportionation reactions. These equations were fitted independently to each of the experimental ΔHox(T, δ) and pO2(T, δ) data sets. The resulting enthalpies of defect reactions were found to be almost the same irrespective of the calculation method. In other words, the models, describing satisfactorily the data, can be used to calculate both compositional dependences and redox thermodynamics of RBaCo2O6-δ (R = Sm or Eu). In addition, from the previously published data and the data presented here, trends were determined in the defect reaction thermodynamics of RBaCo2O6-δ (R = La, Pr, Nd, Sm, Eu, Gd, or Y). Drop calorimetric measurements were performed in air to obtain enthalpy increments for RBaCo2O6-δ (R = Sm or Eu) with variable oxygen content because the samples lost oxygen upon being heated in the calorimetric cell. As-obtained data were used to calculate the functional dependences of enthalpy increments of EuBaCo2O5.56 and SmBaCo2O5.6 with a constant oxygen content. In addition, as an example of practical application-oriented calculations for solar energy conversion and oxygen storage, the performances at equilibrium of RBaCo2O6-δ (R = Pr, Sm, Eu, or Gd) were evaluated and compared to those of SrFeO3-δ as a reference material.
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Affiliation(s)
- Vladimir V Sereda
- Institute of Natural Sciences and Mathematics, Ural Federal University, 19 Mira Street, Yekaterinburg 620002, Russia
| | - Dmitry A Malyshkin
- Institute of Natural Sciences and Mathematics, Ural Federal University, 19 Mira Street, Yekaterinburg 620002, Russia
| | - Ivan L Ivanov
- Institute of Natural Sciences and Mathematics, Ural Federal University, 19 Mira Street, Yekaterinburg 620002, Russia
| | - Dmitry S Tsvetkov
- Institute of Natural Sciences and Mathematics, Ural Federal University, 19 Mira Street, Yekaterinburg 620002, Russia
| | - Andrey Yu Zuev
- Institute of Natural Sciences and Mathematics, Ural Federal University, 19 Mira Street, Yekaterinburg 620002, Russia
| | - Antoine Maignan
- Institute of Natural Sciences and Mathematics, Ural Federal University, 19 Mira Street, Yekaterinburg 620002, Russia.,Laboratoire CRISMAT, UMR 6508 Normandie Université, CNRS, ENSICAEN, UNICAEN, 6 bd du Maréchal Juin, 14050 Caen Cedex 4, France
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