Porous Silicon Oxycarbonitride Ceramics with Palladium and Pd2Si Nanoparticles for Dry Reforming of Methane

Jun Wang; Matthias Grünbacher; Simon Penner; Maged F Bekheet; Aleksander Gurlo

doi:10.3390/polym14173470

Porous Silicon Oxycarbonitride Ceramics with Palladium and Pd₂Si Nanoparticles for Dry Reforming of Methane

Polymers (Basel). 2022 Aug 25;14(17):3470. doi: 10.3390/polym14173470.

Authors

Jun Wang¹, Matthias Grünbacher², Simon Penner², Maged F Bekheet¹, Aleksander Gurlo¹

Affiliations

¹ Chair of Advanced Ceramic Materials, Institute of Material Science and Technology, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany.
² Institute of Physical Chemistry, University of Innsbruck, Innrain 52c, A-6020 Innsbruck, Austria.

Abstract

Pd-containing precursor has been synthesized from palladium acetate and poly(vinly)silazane (Durazane 1800) in an ice bath under an argon atmosphere. The results of ATR-FTIR and NMR characterizations reveal the chemical reaction between palladium acetate and vinyl groups in poly(vinyl)silazane and the hydrolyzation reaction between -Si-H and -Si-CH=CH₂ groups in poly(vinyl)silazane. The palladium nanoparticles are in situ formed in the synthesized precursors as confirmed by XRD, XPS, and TEM. Pd- and Pd₂Si-containing SiOCN ceramic nanocomposites are obtained by pyrolysis of the synthesized precursors at 700 °C, 900 °C-1100 °C in an argon atmosphere. The pyrolyzed nanocomposites display good catalytic activity towards the dry reforming of methane. The sample pyrolyzed at 700 °C possesses the best catalytic performance, which can be attributed to the in situ formed palladium nanoparticles and high BET surface area of about 233 m² g^-1.

Keywords: catalyst support; dry reforming of methane; metal-containing precursors; palladium nanoparticles; polymer-derived ceramics; polysilazane.

Grants and funding

This research was funded by China Scholarship Council (201604910900).