ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Magnetic organic-silica hybrid supported Pt nanoparticles for carbon sequestration reaction

Praveenkumar Ramprakash Upadhyay, Prashant Gautam, and Vivek Srivastava

NIIT University, Neemrana, India

E-mail: vivek.shrivastava@niituniversity.in

Abstract: We revealed a new protocol to support Pt nanoparticles on magnetic ionic liquid functionalized organosilica nanoparticle matrix. The proposed catalyst system was synthesized by sol–gel condensation method, where two silica precursors [tetraethyl orthosilicate (TEOS) and bis-silylated ionic liquid monomer] were used to carry hydrophobic magnetic nanoparticles. The Pt metal was supported on the skeleton of magnetic organosilica hybrid nanoparticles by adsorbing platinum salt (Na₂PtCl₄) (replaced by ion exchange method). Furthermore, sodium borohydride was used to reduce platinum salt to Pt NPs. The synthesized catalytic system was used for CO₂ hydrogenation reaction under high-pressure reaction condition. An external magnetic field was used to informally recover the catalyst and further recycled for three runs (without ionic liquid medium). Task-specific ionic liquids were also manipulated as a reaction medium not only to capture the CO₂ gas but also to improve the reaction in a more precise manner. Desired results were attained while using 1,3-di (N, N-dimethylaminoethyl)-2-methylimidazolium nonafluorobutanesulfonate ([DAMI][CF₃CF₂CF₂CF₂SO₃]) task-specific ionic liquid and we isolated the formic acid in good TON/TOF value. We easily reused the catalytic system up to 8 runs without decreasing the performance and stability of the catalytic system.

Keywords: Magnetic nanoparticles ; Pt nanoparticles ; Task-specific ionic liquid ; Formic acid ; Carbon sequestration 

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-019-00773-2

Chemical Papers 73 (9) 2241–2253 (2019)