Gas difusion electrodes production modified with bimetallic oxides of Nb, Mo, Pd e Zr for the production of H2O2 in situ

• Grant number: 16/12597-0
• Support type: Scholarships in Brazil - Doctorate
• Effective date (Start): August 01, 2017
• Effective date (End): June 30, 2020
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
• Principal Investigator: Marcos Roberto de Vasconcelos Lanza
• Grantee: Leandro Cesar Trevelin
• Home Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
• Associated research grant: 13/02762-5 - Development of technologies to prevent pollution: degradation and monitoring online of antibiotics in sewage, AP.JP
• Associated scholarship(s): 18/17279-1 - Synthesis and characterization of bimetallic oxides of Zr, Nb and Pd incorporated in reduced graphene, BE.EP.DR

Abstract

The present work aims at the development of new bimetallic oxide modifiers consist of Niobium, molybdenum, Zirconium and carbon-supported Palladium Printex 6 l, synthesized from the polymeric precursors, method for the evaluation of the reaction path of oxygen reduction reaction (ORR). This study is necessary to choose the most efficient modifiers for the production of H2O2 from the RRO, and chosen the best materials will be made using gas diffusion electrodes modified (GDEM) for the study of quantification of H2O2 production and later evaluated in the development and improvement of systems with continuous flow reactors. The analysis of materials will be developed by means of electrochemical techniques (cyclic voltammetry, Chronoamperometry and linear scan voltammetry) and physical characterizations as thermogravimetric analysis (TGA), x-ray fluorescence (XRF), x-ray diffraction (XRD), transmission electron microscopy (TEM) and electronic x-ray spectroscopy (XPS). The development of the GDE is performed from an electrochemical cell with bench seating for 400 mL with a working coupled electrode of 20 cm2 and the expectation is the expansion for use in recirculating flow reactors with working electrodes of 200 cm2 (individual electrode or electrode composition system in series) and electrolyte solution of approximately 15 L, where they will be evaluated the best electrochemical conditions of H2O2 production, as well as hydraulic conditions of operation. (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)

ROCHA, ROBSON S.; VALIM, RICARDO B.; TREVELIN, LEANDRO C.; STETER, JULIANA R.; CARNEIRO, JUSSARA F.; FORTI, JULIANE C.; BERTAZZOLI, RODNEI; LANZA, MARCOS R. V. Electrocatalysis of Hydrogen Peroxide Generation Using Oxygen-Fed Gas Diffusion Electrodes Made of Carbon Black Modified with Quinone Compounds. ELECTROCATALYSIS, v. 11, n. 3 MAR 2020. Web of Science Citations: 0.