Copper Nanoparticles Exsolution from Sr(Ti, Fe)O3 Perovskites: Material Tuning and Probing (Electro)catalytic Applicability

Copper Nanoparticles Exsolution from Sr(Ti, Fe)O3 Perovskites: Material Tuning and Probing (Electro)catalytic Applicability | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL This is a preprint and has not been peer reviewed. Data may be preliminary. 26 February 2025 V1 Latest version Share on Copper Nanoparticles Exsolution from Sr(Ti, Fe)O3 Perovskites: Material Tuning and Probing (Electro)catalytic Applicability Authors : Ubong Essien 0000-0001-8892-0511 [email protected] , Swathi Raju , Keyla Santos , Chinyere Ekperechukwu , Francisco García García , Pablo Fernández , and Dragos Neagu Authors Info & Affiliations https://doi.org/10.22541/au.174053528.83093467/v1 Published Nanoscale Advances Version of record Peer review timeline 402 views 149 downloads Contents Abstract Supplementary Material Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract Copper (Cu) is a recyclable, abundant, and promising catalyst for energy transition reactions like electrochemical conversion of nitrate (NO₃RR) and CO2 electroreduction. However, conventional Cu-based electrocatalysts struggle with activity, selectivity, and durability, especially under harsh electrochemical conditions. Exsolution—the in-situ generation of metallic nanoparticles on oxide supports in a single step—enables tightly anchored, size-controlled particles, enhancing stability and performance. Incorporating Cu into Sr1-α(Ti, Fe)O₃-γ perovskites, an earth-abundant system with mixed ionic-electronic conductivity and adequate oxygen vacancies, overcomes the limitations of traditional Sr(Ti, Fe)O₃ in facilitating nanoparticle exsolution. In this work, we demonstrate that incorporating Cu-doping into strontium-titanite-ferrite (STF) (Sr0.95Ti0.3Fe0.7-xCuxO3-γ) perovskites promotes the in-situ exsolution of well-dispersed Cu-nanoparticles with tunable properties. The designed material enables nanoparticle formation at temperatures as low as 400 °C within one hour, representing relatively mild temperature conditions and relatively fast exsolution compared to the literature. By varying the exsolution conditions, such as temperature and time, we demonstrate substantial control over nanoparticle characteristics, for example, particle size between ~13 and ~38 nm and population density between ~118 and 650 particles/μm2, allowing the tuning of catalytic activity for NO₃RR. These findings highlight the potential of Cu-doped perovskites as a versatile and sustainable platform for advanced catalytic applications. Supplementary Material File (figures.docx) Download 6.64 MB File (main document.docx) Download 71.68 KB Information & Authors Information Version history V1 Version 1 26 February 2025 Peer review timeline Published Nanoscale Advances Version of Record 1 Jan 2026 Published Copyright This work is licensed under a Non Exclusive No Reuse License. Keywords cu-doping nitrate reduction perovskite oxide reduction kinetics tuneable exsolved nanoparticles Authors Affiliations Ubong Essien 0000-0001-8892-0511 [email protected] University of Strathclyde Faculty of Engineering View all articles by this author Swathi Raju State University of Campinas View all articles by this author Keyla Santos State University of Campinas View all articles by this author Chinyere Ekperechukwu University of Strathclyde Faculty of Engineering View all articles by this author Francisco García García The University of Edinburgh Institute for Materials and Processes View all articles by this author Pablo Fernández State University of Campinas View all articles by this author Dragos Neagu University of Strathclyde Faculty of Engineering View all articles by this author Metrics & Citations Metrics Article Usage 402 views 149 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation Ubong Essien, Swathi Raju, Keyla Santos, et al. Copper Nanoparticles Exsolution from Sr(Ti, Fe)O3 Perovskites: Material Tuning and Probing (Electro)catalytic Applicability. Authorea . 26 February 2025. DOI: https://doi.org/10.22541/au.174053528.83093467/v1 If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download. For more information or tips please see 'Downloading to a citation manager' in the Help menu . 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