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Dielectric Barrier Plasma Discharge Exsolution of Nanoparticles at Room Temperature and Atmospheric Pressure

Lookup NU author(s): Dr Leonidas Bekris, Professor Ian Metcalfe, Dr Evangelos Papaioannou

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


Abstract

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.


Publication metadata

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

Data Access Statement: This paper is accompanied by representative samples of experimental data and the relevant numerical tabulated raw data is available from Ulster University’s Research Portal at https://doi.org/10.15129/e2e11901-92c4- 4b2e-a83e-ff25052e972a


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Funding

Funder referenceFunder name
Emergent Nanomaterials-Critical Mass Initiative. EP/R023638/1
Emergent Nanomaterials-Critical Mass Initiative. EP/R008841/1
EPSRC. Grant Number: EP/Y015487/1
Emergent Nanomaterials-Critical Mass Initiative. EP/R023522/1
Emergent Nanomaterials-Critical Mass Initiative. EP/R023921/1
Henry Royce Institute. Grant Number: EP/X527257/1
National Research Council of Italy. Grant Number: 2020 STM
Royal Academy of Engineering. Grant Number: CiET1819∖2∖57
Royal Society. Grant Number: RGS∖R2∖222062
UK Catalysis Hub. Grant Number: EP/R027129/1

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