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Article Abstract
Understanding the dynamic evolution of heterogeneous catalysts is crucial yet challenging for elucidating the structure-performance relationships and enabling rational catalyst design. Herein, we reveal that PtIn alloy clusters gradually evolve into PtIn intermetallic in response to propylene, the product of propane dehydrogenation (PDH) reaction. Specifically, a PtIn/SiO catalyst has been fabricated, comprising sub-nanometric PtIn alloy clusters covered by an In overlayer, with In species locating at the metal-support interface. During the PDH reaction propylene induces the evaporation of the In overlayer, thereby exposing Pt sites. After an induction period, the evolved PtIn intermetallic (average size ~1.3 nm) exhibits a CH productivity of 145 mol g h. The alloyed In species effectively dilute Pt-Pt ensembles, enhancing propylene selectivity, while the interfacial In species inhibit aggregation of PtIn intermetallic, ensuring excellent catalytic stability. These findings underscore the critical role of product molecules in shaping active site evolution at the atomic scale.
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| http://dx.doi.org/10.1038/s41467-025-60153-1 | DOI Listing |
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