Journal
CATALYSIS TODAY
Volume 381, Issue -, Pages 126-132Publisher
ELSEVIER
DOI: 10.1016/j.cattod.2020.07.078
Keywords
Metal nanoparticles; Hydrogenation; Selectivity; Phenol
Funding
- CAPES-COFECUB [695/10]
- CNPq
- INCT-Catalise
- FAPESP [2016/16738-7, 2018/26253-6, 2010/11102-0]
- CNRS
- UPS-Universite de Toulouse
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [18/26253-6, 10/11102-0, 16/16738-7] Funding Source: FAPESP
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The large-scale production of biomass-derived fuels generates lignocellulosic residues that can be further converted into bio-derived value-added chemicals, with a focus on the selective hydrogenation of phenol as a model compound. Different nanoparticles (NPs) of Pd, Ru and Rh immobilized on modified silica-based supports showed varying selectivity towards cyclohexanone and cyclohexanol, with titania-containing supports enhancing selectivity.
The large-scale production of biomass-derived fuels generates large amounts of lignocellulosic residues that may further be converted into bio-derived value-added chemicals. Here, we investigate the selective hydrogenation of phenol as a model compound for lignocellulosic derivatives. Pre-formed PVP-stabilized nanoparticles (NPs) of Pd, Ru and Rh prepared using an organometallic approach were immobilized on different magnetic silica-based supports modified with TiO2 or CeO2. In phenol hydrogenation studies, the Pd NP catalysts show high selectivity towards cyclohexanone, while Ru and Rh NP catalysts primarily afford cyclohexanol. Titania-containing supports increase the selectivity towards cyclohexanol for both Pd- and Rh-based catalysts. Interestingly, the combination of Ru NPs and titania-modified silica results in 100 % selectivity of cyclohexanol. After removal of the PVPstabilizer by thermal treatment, the catalyst combining Pd NPs and titania-modified silica leads to 100 % selectivity towards cyclohexanone. Despite the difficulties associated with the de-polymerization of biomass residues, the development of new catalyst materials for highly selective transformations of biomass-derived platform molecules contributes to a sustainable production of various value-added chemicals for several applications.
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