AI Article Synopsis
- Understanding atomic migration in catalysts is key for improving their performance in reactions.
- The study outlines a novel method for converting noble-metal nanoparticles into single atom alloys using thermal treatment with hydrogen and argon.
- Findings show that this conversion results from the combination of hydrogen dissociation and the reduction of metal oxide supports, providing insights into catalyst design and nanomaterial formation.
Article Abstract
Picturing the atomic migration pathways of catalysts in a reactive atmosphere is of central significance for uncovering the underlying catalytic mechanisms and directing the design of high-performance catalysts. Here, we describe a reduction-controlled atomic migration pathway that converts nanoparticles to single atom alloys (SAAs), which has remained synthetically challenging in prior attempts due to the elusive mechanism. We achieved this by thermally treating the noble-metal nanoparticles M (M = Ru, Rh, Pd, Ag, Ir, Pt, and Au) on metal oxide (CuO) supports with H/Ar. Atomic-level characterization revealed such conversion as the synergistic consequence of noble metal-promoted H dissociation and concomitant CuO reduction. The observed atomic migration pathway offers an understanding of the dynamic mechanisms study of nanomaterials formation and catalyst design.
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| http://dx.doi.org/10.1021/acs.nanolett.2c01314 | DOI Listing |
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