Publication Type Journal Article
Title Tetraalkylammonium Functionalized Hydrochars as Efficient Supports for Palladium Nanocatalysts
Authors Tiago A. G. Duarte Isabelle Favier Christian Pradel L.M.D.R.S. Martins Ana P. Carvalho Daniel Pla Montserrat Gomez
Groups CCC Chem4Env
Journal CHEMCATCHEM
Year 2020
Month April
Volume 12
Number 8
Pages 2295-2303
Abstract With the aim of preparing bio-sourced supports with enhanced properties in catalysis, we devised an original strategy allowing the immobilization of metal nanoparticles. Thus, size-controlled hydrochars with a high degree of hydroxyl functionalities, from both neat sucrose or modified with acrylic acid (10 wt.\%), were derivatized with ether linkers containing ammonium groups. These non-porous carbon-based materials were used as suitable supports for the immobilization of palladium nanoparticles. The catalytic materials were synthesized by reduction of Pd(OAc)(2) to Pd(0) under H-2 atmosphere in the presence of the corresponding hydrochar, and fully characterized by standard methods. Among the different hydrochar-supported palladium materials, those functionalized with tetraalkylammonium groups afforded heterogeneous catalysts, exhibiting high activity in hydrogenations of different types of substrates (alkynes, alkenes, and carbonyl and nitro derivatives). The most efficient catalyst was recycled up to ten runs without loss of catalytic behavior, in agreement with the unchanged composite materials after catalysis (Transmission Electron Microscopy (TEM) analyses) and the lack of metal leaching in the extracted organic products (no palladium detected by Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES)); these systems exhibited enhanced recyclability properties as compared to commercial Pd/C catalyst.
DOI http://dx.doi.org/10.1002/cctc.201902305
ISBN
Publisher WILEY-V C H VERLAG GMBH
Book Title
ISSN 1867-3880
EISSN 1867-3899
Conference Name
Bibtex ID ISI:000528050700022
Observations
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