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Zhu Y, Zhang N, Zhang W, Zhao L, Gong Y, Wang R, Wang H, Jin J, He B. Realizing Efficient Activity and High Conductivity of Perovskite Symmetrical Electrode by Vanadium Doping for CO 2 Electrolysis. ACS APPLIED MATERIALS & INTERFACES 2024; 16:36343-36353. [PMID: 38965043 DOI: 10.1021/acsami.4c05465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/06/2024]
Abstract
Solid oxide electrolysis cells (SOECs) show significant promise in converting CO2 to valuable fuels and chemicals, yet exploiting efficient electrode materials poses a great challenge. Perovskite oxides, known for their stability as SOEC electrodes, require improvements in electrocatalytic activity and conductivity. Herein, vanadium(V) cation is newly introduced into the B-site of Sr2Fe1.5Mo0.5O6-δ perovskite to promote its electrochemical performance. The substitution of variable valence V5+ for Mo6+ along with the creation of oxygen vacancies contribute to improved electronic conductivity and enhanced electrocatalytic activity for CO2 reduction. Notably, the Sr2Fe1.5Mo0.4V0.1O6-δ based symmetrical SOEC achieves a current density of 1.56 A cm-2 at 1.5 V and 800 °C, maintaining outstanding durability over 300 h. Theoretical analysis unveils that V-doping facilitates the formation of oxygen vacancies, resulting in high intrinsic electrocatalytic activity for CO2 reduction. These findings present a viable and facile strategy for advancing electrocatalysts in CO2 conversion technologies.
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Affiliation(s)
- Yan Zhu
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
| | - Nan Zhang
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
| | - Wenyu Zhang
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
| | - Ling Zhao
- School of Marine Science and Engineering, Hainan University, Haikou 570228, PR China
- Shenzhen Research Institute, China University of Geosciences, Shenzhen, 518057, China
| | - Yansheng Gong
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
| | - Rui Wang
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
| | - Huanwen Wang
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
| | - Jun Jin
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
| | - Beibei He
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
- Shenzhen Research Institute, China University of Geosciences, Shenzhen, 518057, China
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Lankauf K, Lemieszek B, Górnicka K, Błaszczak P, Zając M, Jasiński P, Molin S. Enhanced Electrochemical Performance of MnCo 1.5Fe 0.5O 4Spinel for Oxygen Evolution Reaction through Heat Treatment. ENERGY & FUELS : AN AMERICAN CHEMICAL SOCIETY JOURNAL 2024; 38:1330-1336. [PMID: 38264624 PMCID: PMC10804274 DOI: 10.1021/acs.energyfuels.3c02875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 11/27/2023] [Accepted: 12/14/2023] [Indexed: 01/25/2024]
Abstract
MnCo1.5Fe0.5O4 spinel oxide was synthesized using the sol-gel technique, followed by heat treatment at various temperatures (400, 600, 800, and 1000 °C). The prepared materials were examined as anode electrocatalysts for water-splitting systems in alkaline environments. Solid-state characterization methods, such as powder X-ray diffraction and X-ray absorption spectroscopy (XAS), were used to analyze the materials' crystallographic structure and surface characteristics. The intrinsic activity of the MnCo1.5Fe0.5O4 was fine-tuned by altering the electronic structure by controlling the calcination temperature, and the highest activity was observed for the sample treated at 800 °C. A shift in the valence state of surface cations under oxidative conditions in an alkaline solution during the oxygen evolution reaction was detected through ex situ XAS measurements. Moreover, the influence of the experimental conditions on the electrocatalytic performance of the material, including the pH of the electrolyte and the temperature, was demonstrated.
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Affiliation(s)
- Krystian Lankauf
- Advanced
Materials Center, Faculty of Electronics, Telecommunications and Informatics, Gdańsk University of Technology, ul. G. Narutowicza 11/12, Gdańsk 80-233, Poland
| | - Bartłomiej Lemieszek
- Advanced
Materials Center, Faculty of Electronics, Telecommunications and Informatics, Gdańsk University of Technology, ul. G. Narutowicza 11/12, Gdańsk 80-233, Poland
| | - Karolina Górnicka
- Advanced
Materials Center, Faculty of Applied Physics and Mathematics, Gdańsk University of Technology, ul. G. Narutowicza 11/12, Gdańsk 80-233, Poland
| | - Patryk Błaszczak
- Advanced
Materials Center, Faculty of Applied Physics and Mathematics, Gdańsk University of Technology, ul. G. Narutowicza 11/12, Gdańsk 80-233, Poland
| | - Marcin Zając
- National
Synchrotron Radiation Centre Solaris, Jagiellonian
University, ul. Czerwone Maki 98, Kraków 30-392, Poland
| | - Piotr Jasiński
- Advanced
Materials Center, Faculty of Electronics, Telecommunications and Informatics, Gdańsk University of Technology, ul. G. Narutowicza 11/12, Gdańsk 80-233, Poland
| | - Sebastian Molin
- Advanced
Materials Center, Faculty of Electronics, Telecommunications and Informatics, Gdańsk University of Technology, ul. G. Narutowicza 11/12, Gdańsk 80-233, Poland
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Zhang P, Lun P, Wang H, Jing J, Wang A, Jiang D, Guo L, Mi W, Yang Z. A self-assembled hybrid electrode for reversible symmetrical solid oxide cells. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2023.141872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Zhang X, Liu B, Yang Y, Li J, Li J, Zhao Y, Jia L, Sun Y. Advances in component and operation optimization of solid oxide electrolysis cell. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.108035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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Tian Y, He S, Liu Y, Yang C, Yang R, Li Y, Wang X, Li W, Chi B, Pu J. Comprehensive understanding of alkaline-earth elements effects on electrocatalytic activity and stability of LaFe0.8Ni0.2O3 electrode for high-temperature CO2 electrolysis. J CO2 UTIL 2021. [DOI: 10.1016/j.jcou.2021.101727] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Duranti L, Luisetto I, Casciardi S, Gaudio CD, Bartolomeo ED. Multi-functional, high-performing fuel electrode for dry methane oxidation and CO2 electrolysis in reversible solid oxide cells. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.139163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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