Study of gold catalysts for oxidation reactions

• Grant number: 14/10824-3
• Support type: Scholarships in Brazil - Post-Doctorate
• Effective date (Start): September 01, 2014
• Effective date (End): September 03, 2018
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Inorganic Chemistry
• Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
• Principal researcher: Liane Marcia Rossi
• Grantee: Camila Palombo Ferraz
• Home Institution: Instituto de Química (IQ). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated scholarship(s): 17/03235-0 - Biomass valorization through 5-hydroxymethylfurfural (HMF) oxidation catalyzed by AuPd nanoparticles, BE.EP.PD

Abstract

The chemistry of gold offers unique opportunities in catalysis and excellent alternative for the development of viable industrial processes for conversion of renewable biomass into bio-based chemicals, in particular through oxidation reactions. Gold nanocatalysts have demonstrated excellent catalytic properties and high selectivity in various reactions, especially catalytic oxidations, although gold still has a limited impact on industrial catalysis. One of the limitations in the practical use of gold as catalyst in oxidations is the low activity of gold in the absence of base, which can cause degradation of the catalyst and undesired side reactions. This post-doctoral research project falls within the current FAPESP process number 2012/08691-0 - "Exploring the chemistry of gold and its unique opportunities in catalysis for conversion of biomass to biobased chemicals". The main objectives are the development of catalytic systems based gold, to study the effect of addition of base on selectivity and catalyst stability in the oxidation of alcohols and sugars, and look for alternatives to avoid the use of base, for example, the effect of using basic solid supports. The selective oxidations are one of the most important functional group transformations in organic chemistry, being crucial in industrial processes for the generation of important intermediates. The use of catalysts enables the use of green oxidants such as molecular oxygen, producing only water as by-product. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

FERRAZ, CAMILA P.; BRAGA, ADRIANO H.; GHAZZAL, MOHAMED NAWFAL; ZIELINSKI, MICHAL; PIETROWSKI, MARIUSZ; JR, IVALDO ITABAIANA; DUMEIGNIL, FRANCK; ROSSI, LIANE M.; WOJCIESZAK, ROBERT. Efficient Oxidative Esterification of Furfural Using Au Nanoparticles Supported on Group 2 Alkaline Earth Metal Oxides. CATALYSTS, v. 10, n. 4 APR 2020. Web of Science Citations: 0.

FERRAZ, CAMILA P.; COSTA, NATALIA J. S.; TEIXEIRA-NETO, ERICO; TEIXEIRA-NETO, ANGELA A.; LIRIA, CLEBER W.; THURIOT-ROUKOS, JOELLE; MACHINI, M. TERESA; FROIDEVAUX, RENATO; DUMEIGNIL, FRANCK; ROSSI, LIANE M.; WOJCIESZAK, ROBERT. 5-Hydroxymethylfurfural and Furfural Base-Free Oxidation over AuPd Embedded Bimetallic Nanoparticles. CATALYSTS, v. 10, n. 1 JAN 2020. Web of Science Citations: 4.

FERRAZ, CAMILA P.; GARCIA, MARCO AURELIO S.; TEIXEIRA-NETO, ERICO; ROSSI, LIANE M. Oxidation of benzyl alcohol catalyzed by gold nanoparticles under alkaline conditions: weak vs. strong bases. RSC ADVANCES, v. 6, n. 30, p. 25279-25285, 2016. Web of Science Citations: 22.