Design of carbon supports for metal-catalyzed acetylene hydrochlorination

Selina K. Kaiser, Ivan Surin, Ana Amorós-Pérez, Simon Büchele, Frank Krumeich, Adam H. Clark, Maria C. Román-Martínez, Maria A. Lillo-Ródenas and Javier Pérez-Ramírez ()
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Selina K. Kaiser: Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich
Ivan Surin: Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich
Ana Amorós-Pérez: Department of Inorganic Chemistry and Materials Institute (IUMA), University of Alicante
Simon Büchele: Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich
Frank Krumeich: Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich
Adam H. Clark: Paul Scherrer Institut
Maria C. Román-Martínez: Department of Inorganic Chemistry and Materials Institute (IUMA), University of Alicante
Maria A. Lillo-Ródenas: Department of Inorganic Chemistry and Materials Institute (IUMA), University of Alicante
Javier Pérez-Ramírez: Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich

Nature Communications, 2021, vol. 12, issue 1, 1-8

Abstract: Abstract For decades, carbons have been the support of choice in acetylene hydrochlorination, a key industrial process for polyvinyl chloride manufacture. However, no unequivocal design criteria could be established to date, due to the complex interplay between the carbon host and the metal nanostructure. Herein, we disentangle the roles of carbon in determining activity and stability of platinum-, ruthenium-, and gold-based hydrochlorination catalysts and derive descriptors for optimal host design, by systematically varying the porous properties and surface functionalization of carbon, while preserving the active metal sites. The acetylene adsorption capacity is identified as central activity descriptor, while the density of acidic oxygen sites determines the coking tendency and thus catalyst stability. With this understanding, a platinum single-atom catalyst is developed with stable catalytic performance under two-fold accelerated deactivation conditions compared to the state-of-the-art system, marking a step ahead towards sustainable PVC production.

Date: 2021
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DOI: 10.1038/s41467-021-24330-2

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