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Lookup NU author(s): Dr Leonidas Bekris, Professor Ian Metcalfe, Dr Evangelos Papaioannou
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
Exsolution of metal nanoparticles (NPs) on perovskite oxides has beendemonstrated as a reliable strategy for producing catalyst-support systems.Conventional exsolution requires high temperatures for long periods of time,limiting the selection of support materials. Plasma direct exsolution isreported at room temperature and atmospheric pressure of Ni NPs from amodel A-site deficient perovskite oxide (La 0.43 Ca 0.37 Ni 0.06 Ti 0.94 O2.955 ). Plasmaexsolution is carried out within minutes (up to 15 min) using a dielectricbarrier discharge configuration both with He-only gas as well as with He/H2gas mixtures, yielding small NPs (<30 nm diameter). To prove the practicalutility of exsolved NPs, various experiments aimed at assessing their catalyticperformance for methanation from synthesis gas, CO, and CH4 oxidation arecarried out. Low-temperature and atmospheric pressure plasma exsolution aresuccessfully demonstrated and suggest that this approach could contribute tothe practical deployment of exsolution-based stable catalyst systems.
Author(s): Haq A, Fanelli F, Bekris L, Martin AM, Lee S, Khalid H, Savaniu CD, Kousi K, Metcalfe IS, Irvine JTS, Maguire P, Papaioannou EI, Mariotti D
Publication type: Article
Publication status: Published
Journal: Advanced Science
Year: 2024
Pages: Epub ahead of print
Online publication date: 04/07/2024
Acceptance date: 08/05/2024
Date deposited: 05/07/2024
Publisher: Wiley-VCH Verlag GmbH & Co. KGaA
URL: https://doi.org/10.1002/advs.202402235
DOI: 10.1002/advs.202402235
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