Nanostructuring unlocks high performance of platinum single-atom catalysts for stable vinyl chloride production.

ABSTRACT: A worldwide replacement of the toxic mercuric chloride catalyst in vinyl chloride manufacture via acetylene hydrochlorination is slowed down by the limited durability of alternative catalytic systems at high space velocities. Here, we demonstrate that platinum single atoms on carbon carriers are substantially more stable (up to 1073 K) 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 characterisation, and density functional theory, we assess how the Pt species determines the catalytic performance and thereby identify Pt(II)-Cl as the active site, being three times more active than Pt nanoparticles. Remarkably, we show that Pt

SUBMITTER: Kaiser SK 

PROVIDER: S-EPMC7156288 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature