Tuning the selectivity of phenol hydrogenation using Pd, Rh and Ru nanoparticles supported on ceria- and titania-modified silicas

Author(s)

Vono, Lucas L. R. ^{[1, 2]} ; Broicher, Cornelia ^{[1, 3]} ; Philippot, Karine ^[2] ; Rossi, Liane M. ^[1]

Affiliation

^[1] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, Av Prof Lineu Prestes 748, BR-05508000 Sao Paulo, SP - Brazil

^[2] Univ Toulouse, CNRS, LCC Lab Chim Coordinat, UPR8241, UP, INPT, F-31077 Toulouse 4 - France

^[3] Tech Univ Berlin, Str 17 Juni 124, D-10623 Berlin - Germany

• Document type: Journal article
• Source: CATALYSIS TODAY; v. 381, p. 126-132, DEC 1 2021.
• Web of Science Citations: 0

Abstract

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. (AU)

• FAPESP's process: 18/26253-6 - COOPERATIVE CATALYSIS: AN ALTERNATIVE FOR THE DEVELOPMENT OF GOLD AND EARTH-ABUNDANT TRANSITION METAL CATALYSTS
• Grantee: Liane Marcia Rossi
• Support Opportunities: Regular Research Grants
• FAPESP's process: 10/11102-0 - Development of nanocomposites as supports for nanostructured metal catalysts
• Grantee: Lucas Lucchiari Ribeiro Vono
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 16/16738-7 - Study of the influence of organic ligands on the reactivity of gold nanoparticles
• Grantee: Liane Marcia Rossi
• Support Opportunities: Regular Research Grants