Projects per year
Abstract
In this study, perovskite oxides La0.3Ca0.6Ni0.05MnxTi0.95−xO3−γ (x = 0, 0.05, 0.10) are investigated as potential solid oxide electrolysis cell cathode materials. The catalytic activity of these cathodes toward CO2 reduction reaction is significantly enhanced through the exsolution of highly active Ni nanoparticles, driven by applying a current of 1.2 A in 97% CO2 – 3% H2O. The performance of La0.3Ca0.6Ni0.05Ti0.95O3−γ is notably improved by co-doping with Mn. Mn dopants enhance the reducibility of Ni, a crucial factor in promoting the in situ exsolution of metallic nanocatalysts in perovskite (ABO3) structures. This improvement is attributed to Mn dopants enabling more flexible coordination, resulting in higher oxygen vacancy concentration, and facilitating oxygen ion migration. Consequently, a higher density of Ni nanoparticles is formed. These oxygen vacancies also improve the adsorption, desorption, and dissociation of CO2 molecules. The dual doping strategy provides enhanced performance without degradation observed after 133 h of high-temperature operation, suggesting a reliable cathode material for CO2 electrolysis.
Original language | English |
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Article number | 2308481 |
Number of pages | 11 |
Journal | Advanced Materials |
Volume | 36 |
Issue number | 19 |
Early online date | 19 Feb 2024 |
DOIs | |
Publication status | Published - 9 May 2024 |
Keywords
- CO2 electrolysis
- in situ exsolution
- Nanoparticles
- Perovkites
- Solid oxide electrolysis cells
Fingerprint
Dive into the research topics of 'Enhanced CO2 electrolysis through Mn substitution coupled with Ni exsolution in lanthanum calcium titanate electrodes'. Together they form a unique fingerprint.Projects
- 4 Finished
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IDRIC: Industrial Decarbonisation Research and Innovation Centre (IDRIC)
Irvine, J. T. S. (PI) & Agnew, G. (CoI)
1/07/21 → 31/03/24
Project: Standard
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Light Element Analysis Facility (LEAF): Light Element Analysis Facility (LEAF)
Irvine, J. T. S. (PI), Baker, R. (CoI) & Miller, D. N. (CoI)
5/04/20 → 4/04/23
Project: Standard
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Electon Microscopy: Electon Microscopy for the characterisation and manipulation of advanced function materials and their interfaces at the nanoscale
Irvine, J. T. S. (PI), Baker, R. (CoI) & Zhou, W. (CoI)
1/04/18 → 2/09/20
Project: Standard
Datasets
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Enhanced CO2 electrolysis through Mn substitution coupled with Ni exsolution in Lanthanum Calcium Titanate electrodes (dataset)
Zhang, N. (Creator), Naden, A. B. (Creator), Zhang, L. (Contributor), Yang, X. (Contributor), Connor, P. A. (Contributor) & Irvine, J. T. S. (Creator), University of St Andrews, 2023
DOI: 10.17630/37dc9037-b6fc-49c3-b217-a126e8c8e19f
Dataset
File