The intrinsic instability of highly active gold single atoms on carbon carriers hinders their industrial application in polyvinyl chloride manufacture via acetylene hydrochlorination, thwarting the replacement of toxic mercuric chloride-based catalysts. Herein, we demonstrate that platinum single atoms are substantially more stable (up to 1073 K) on carbon carriers than their gold counterparts (up to 473 K), enabling facile and scalable preparation and precise tuning of their coordination environment by simple temperature control. By combining kinetic analysis, advanced characterization, and density functional theory, we assess how the Pt speciation determines the catalytic performance and thereby identify Pt(II)?Cl as the active site, being three times more active than Pt nanoparticles. Finally, we show that Pt single atoms exhibit unprecedented stability in acetylene hydrochlorination and ultimately achieve higher space-time-yields than state-of-the-art Au single-atom systems, giving new prospects for sustainable vinyl chloride production.

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Please use this identifier to cite or link to this collection:doi:10.19061/iochem-bd-1-131

This dataset derived results are published in:

Manuscript title: Nanostructuring unlocks high performance of platinum single-atom catalysts for stable vinyl chloride production

Journal: Nature Catalysis

DOI: 10.1038/s41929-020-0431-3

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