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

Min Xu, Yukwon Jeon, Aaron Naden, Heesu Kim, Gwilherm Kerherve, David J. Payne, Yong-gun Shul and John T. S. Irvine ()
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Min Xu: University of St Andrews
Yukwon Jeon: Yonsei University
Aaron Naden: University of St Andrews
Heesu Kim: Yonsei University
Gwilherm Kerherve: Imperial College London
David J. Payne: Imperial College London
Yong-gun Shul: Yonsei University
John T. S. Irvine: University of St Andrews

Nature Communications, 2024, vol. 15, issue 1, 1-10

Abstract: 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 (600-800 oC). 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.

Date: 2024
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DOI: 10.1038/s41467-024-48455-2

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