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Rapid Plasma Exsolution from an A‐site Deficient Perovskite Oxide at Room Temperature
Author(s) -
Khalid Hessan,
Haq Atta ul,
Alessi Bruno,
Wu Ji,
Savaniu Cristian D.,
Kousi Kalliopi,
Metcalfe Ian S.,
Parker Stephen C.,
Irvine John T. S.,
Maguire Paul,
Papaioannou Evangelos I.,
Mariotti Davide
Publication year - 2022
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.202201131
Subject(s) - materials science , nanoparticle , perovskite (structure) , plasma , catalysis , microstructure , oxide , nanotechnology , ion , chemical engineering , chemical physics , metallurgy , physics , quantum mechanics , engineering , biochemistry , chemistry
High‐performance nanoparticle platforms can drive catalysis progress to new horizons, delivering environmental and energy targets. Nanoparticle exsolution offers unprecedented opportunities that are limited by current demanding process conditions. Unraveling new exsolution pathways, particularly at low‐temperatures, represents an important milestone that will enable improved sustainable synthetic route, more control of catalysis microstructure as well as new application opportunities. Herein it is demonstrated that plasma direct exsolution at room temperature represents just such a step change in the synthesis. Moreover, the factors that most affect the exsolution process are identified. It is shown that the surface defects produced initiate exsolution under a brief ion bombardment of an argon low‐pressure and low‐temperature plasma. This results in controlled nanoparticles with diameters ≈19–22 nm with very high number densities thus creating a highly active catalytic material for CO oxidation which rivals traditionally created exsolved samples.