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- W4311583180 abstract "Atom-by-atom control of a catalyst surface is a central yet challenging topic in heterogeneous catalysis, which enables precisely confined adsorption and oriented approach of reactant molecules. Here, exposed surfaces with either consecutive Pd trimers (Pd3) or isolated Pd atoms (Pd1) are architected for Pd2Ga intermetallic nanoparticles (NPs) using reactive metal-support interaction (RMSI). At elevated temperatures under hydrogen, in situ atomic-scale transmission electron microscopy directly visualizes the refacetting of Pd2Ga NPs from energetically favorable (013)/(020) facets to (011)/(002). Infrared spectroscopy and acetylene hydrogenation reaction complementarily confirm the evolution from consecutive Pd3 to Pd1 sites of Pd2Ga catalysts with the concurrent fingerprinting CO adsorption and featured reactivities. Through theoretical calculations and modeling, we reveal that the restructured Pd2Ga surface results from the preferential arrangement of additionally reduced Ga atoms on the surface. Our work provides previously unidentified mechanistic insight into temperature-promoted RMSI and possible solutions to control and rearrange the surface atoms of supported intermetallic catalyst." @default.
- W4311583180 created "2022-12-27" @default.
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- W4311583180 date "2022-12-09" @default.
- W4311583180 modified "2023-10-05" @default.
- W4311583180 title "Patterning the consecutive Pd <sub>3</sub> to Pd <sub>1</sub> on Pd <sub>2</sub> Ga surface via temperature-promoted reactive metal-support interaction" @default.
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- W4311583180 doi "https://doi.org/10.1126/sciadv.abq5751" @default.
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- W4311583180 hasPublicationYear "2022" @default.
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