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Pt Nanoparticles Supported over Porous Porphyrin Nanospheres for Chemoselective Hydrogenation Reactions
Author(s) -
Modak Arindam,
Bhanja Piyali,
Bhaumik Asim
Publication year - 2019
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201802108
Subject(s) - chemoselectivity , catalysis , porphyrin , sulfonic acid , surface modification , selectivity , chemistry , context (archaeology) , nanoparticle , organic chemistry , materials science , nanotechnology , paleontology , biology
Optimizing the chemoselectivity in a chemical reaction catalyzed by metallic nanoparticles (NPs) hosted over a solid support is a big challenge, especially in the context of the sustainability of the process. Here we showed that chemoselectivity in the hydrogenation of 4‐nitrostyrene can be tailored on Pt‐loaded porphyrin nanospheres through the functionalization with sulfonic acid groups at the catalyst surface. 4‐Nitrostyrene is transformed to 4‐aminostyrene over sulfonated Pt‐POP‐SO 3 H, with ∼77.8 % selectivity at conversion of ∼90 %, whereas the pristine catalyst selectively produced ∼80 % 4‐ethylnitrobenezene at almost complete conversion level. The reversal of the selectivity could be attributed to the effect of the introduction of sulfonic acid group over the supported Pt NPs. Presence of sulfonic acid groups in the functionalized Pt‐porphyrin material has been confirmed from XPS, FT‐IR and elemental analysis data. Moreover, these catalysts are recyclable, suggesting their durability and chemical‐stability for long‐term sustainable operations.