Synergistic growth of nickel and platinum nanoparticles via exsolution and surface reaction

Min Xu, Yukwon Jeon, Aaron Benjamin Naden, Heesu Kim, Gwilherm Kerherve, David J Payne, Yong-gun Shul, John Thomas Sirr Irvine*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Bimetallic catalysts combining precious and earth-abundant metals in well designed nanoparticle architectures can enable cost efficient and stable heterogeneous catalysis. Here, we present an interaction-driven in-situ approach to engineer finely dispersed Ni decorated Pt nanoparticles (1-6 nm) on perovskite nanofibres via reduction at high temperatures (600-800oC). Deposition of Pt (0.5 wt%) enhances the reducibility of the perovskite support and promotes the nucleation of Ni cations via metal-support interaction, thereafter the Ni species react with Pt forming alloy nanoparticles, with the combined processes yielding smaller nanoparticles that either of the contributing processes. Tuneable uniform Pt-Ni nanoparticles are produced on the perovskite surface, yielding reactivity and stability surpassing 1 wt.% Pt/γ-Al2O3 catalysts for CO oxidation. This approach heralds the possibility of in-situ fabrication of supported bimetallic nanoparticles with engineered compositional distributions and performance.
Original languageEnglish
Number of pages10
JournalNature Communications
Volume15
Early online date13 May 2024
DOIs
Publication statusE-pub ahead of print - 13 May 2024

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