Reduction-Controlled Atomic Migration for Single Atom Alloy Library br

Picturing the atomic migration pathways of catalystsin a reactive atmosphere is of central significance for uncoveringthe underlying catalytic mechanisms and directing the design ofhigh-performance catalysts.Here,wedescribeareduction-controlled atomic migration pathway that converts nanoparticlesto single atom alloys (SAAs), which has remained syntheticallychallenging in prior attempts due to the elusive mechanism. Weachieved this by thermally treating the noble-metal nanoparticles M (M = Ru, Rh, Pd, Ag, Ir, Pt, and Au) on metal oxide (CuO)supports with H2/Ar. Atomic-level characterization revealed such conversion as the synergistic consequence of noble metal-promoted H2dissociation and concomitant CuO reduction. The observed atomic migration pathway offers an understanding of thedynamic mechanisms study of nanomaterials formation and catalyst design