Unknown

Dataset Information

0

Copper nanoparticle exsolution from Sr(Ti, Fe)O<sub>3</sub> perovskites: material tuning and probing (electro)catalytic applicability.

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 promising ionic-electronic conductivity and adequate oxygen vacancies, overcomes the limitations of traditional Sr(Ti, Fe)O3-γ in facilitating nanoparticle exsolution. This work demonstrates controlled Cu nanoparticle exsolution from Sr0.95Ti0.3Fe0.7-x Cu x O3-γ perovskites at temperatures as low as 400 °C, notably milder than conventional exsolution conditions. By systematically varying reduction parameters, we achieve control over nanoparticle size (13-38 nm) and population density (118-650 particles per µm2). Electrochemical characterisation using nitrate reduction as a probe reaction demonstrates how exsolution conditions directly influence surface reactivity, establishing these materials as tuneable platforms for (electro)catalytic applications.

SUBMITTER: Essien UA 

PROVIDER: S-EPMC12908656 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature

Json Xml
altmetric image

Publications

Copper nanoparticle exsolution from Sr(Ti, Fe)O&lt;sub&gt;3&lt;/sub&gt; perovskites: material tuning and probing (electro)catalytic applicability.

Essien Ubong Akpan UA   Raju Swathi Patchaiammal SP   Santos Keyla Teixeira KT   Vicente Rafael Alcides RA   Ekperechukwu Chinyere Adaora CA   García-García Francisco R FR   Fernández Pablo Sebastián PS   Neagu Dragos D  

Nanoscale advances 20251210 6

Copper (Cu) is a recyclable, abundant, and promising catalyst for energy transition reactions like electrochemical conversion of nitrate (NO<sub>3</sub>RR) and CO<sub>2</sub> electroreduction. However, conventional Cu-based electrocatalysts struggle with activity, selectivity, and durability, especially under harsh electrochemical conditions. Exsolution-the <i>in situ</i> generation of metallic nanoparticles on oxide supports in a single step-enables tightly anchored, size-controlled particles,  ...[more]

Similar Datasets

Unknown Stability and Exsolution of Sr&lt;sub&gt;0.98&lt;/sub&gt;Ti&lt;sub&gt;0.7&lt;/sub&gt;Fe&lt;sub&gt;0.25&lt;/sub&gt;Ni&lt;sub&gt;0.05&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; for the Oxygen Evolution Reaction in an Alkaline Environment.
| S-EPMC12314905 | biostudies-literature
Unknown How Ti Doping Improves the Catalytic Methane Dry Reforming of Nanoporous Reduced LaNiO&lt;sub&gt;3&lt;/sub&gt; Perovskites.
| S-EPMC12645428 | biostudies-literature
Unknown Heteronanoarchitecture of Ti&lt;sub&gt;3&lt;/sub&gt;C&lt;sub&gt;2&lt;/sub&gt;T&lt;sub&gt;x&lt;/sub&gt; MXene and Amorphous MOF for Exceptional Durability in Electro-Ionic Soft Actuator.
| S-EPMC12392866 | biostudies-literature
Unknown Ti&lt;sub&gt;3&lt;/sub&gt;C&lt;sub&gt;2&lt;/sub&gt;T &lt;sub&gt;&lt;i&gt;x&lt;/i&gt;&lt;/sub&gt; MXene Based Electro-Ionic Soft Actuator with Potential for Wearable Finger Straps.
| S-EPMC11500392 | biostudies-literature
Unknown Effects of Ca Substitution in Single-Phase Sr&lt;sub&gt;1-x&lt;/sub&gt;Ca&lt;sub&gt;x&lt;/sub&gt;Ti&lt;sub&gt;0.8&lt;/sub&gt;Fe&lt;sub&gt;0.2&lt;/sub&gt;O&lt;sub&gt;3-ẟ&lt;/sub&gt; Oxygen Transport Membranes and in Dual-Phase Sr&lt;sub&gt;1-x&lt;/sub&gt;Ca&lt;sub&gt;x&lt;/sub&gt;Ti&lt;sub&gt;0.8&lt;/sub&gt;Fe&lt;sub&gt;0.2&lt;/sub&gt;O&lt;sub&gt;3-ẟ&lt;/sub&gt;-Ce&lt;sub&gt;0.8&lt;/sub&gt;Gd&lt;sub&gt;0.2&lt;/sub&gt;O&lt;sub&gt;2&lt;/sub&gt; Membranes.
| S-EPMC12471747 | biostudies-literature
Unknown Synthesis and Characterization of Ti&lt;sup&gt;4+&lt;/sup&gt; Containing Carbonates Ti[CO&lt;sub&gt;4&lt;/sub&gt;] and Ti&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt;[CO&lt;sub&gt;3&lt;/sub&gt;].
| S-EPMC12674196 | biostudies-literature
Unknown Miscible chemical ordering in Ti-Cr-Mo quinary system by solid solution of Mo&lt;sub&gt;2&lt;/sub&gt;Ti&lt;sub&gt;2&lt;/sub&gt;AlC&lt;sub&gt;3&lt;/sub&gt; and Cr&lt;sub&gt;2.5&lt;/sub&gt;Ti&lt;sub&gt;1.5&lt;/sub&gt;AlC&lt;sub&gt;3&lt;/sub&gt; o-MAXs.
| S-EPMC11950389 | biostudies-literature
Unknown Performance Prediction of High-Entropy Perovskites La&lt;sub&gt;0.8&lt;/sub&gt;Sr&lt;sub&gt;0.2&lt;/sub&gt;Mn&lt;sub&gt;x&lt;/sub&gt;Co&lt;sub&gt;y&lt;/sub&gt;Fe&lt;sub&gt;z&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; with Automated High-Throughput Characterization of Combinatorial Libraries and Machine Learning.
| S-EPMC11636067 | biostudies-literature
Unknown Probing the synergistic effects of amino compounds in mitigating oxidation in 2D Ti&lt;sub&gt;3&lt;/sub&gt;C&lt;sub&gt;2&lt;/sub&gt;T &lt;sub&gt;&lt;i&gt;x&lt;/i&gt;&lt;/sub&gt; MXene nanosheets in aqueous environments.
| S-EPMC11694566 | biostudies-literature
Unknown Compositional study of Ti-Nb oxide (TiNb&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;7&lt;/sub&gt;, Ti&lt;sub&gt;2&lt;/sub&gt;Nb&lt;sub&gt;10&lt;/sub&gt;O&lt;sub&gt;29&lt;/sub&gt;, Ti&lt;sub&gt;2&lt;/sub&gt;Nb&lt;sub&gt;14&lt;/sub&gt;O&lt;sub&gt;39&lt;/sub&gt;, and TiNb&lt;sub&gt;24&lt;/sub&gt;O&lt;sub&gt;62&lt;/sub&gt;) anodes for high power Li ion batteries.
| S-EPMC11891643 | biostudies-literature