Evaluation of modified gas diffusion electrodes (EDGM) with zinc and nickel phthalocyanines for electrosynthesis of hydrogen peroxide (H2O2)

• Grant number: 12/07698-0
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: July 01, 2012
• End date: December 31, 2013
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal Investigator: Marcos Roberto de Vasconcelos Lanza
• Grantee: Leandro Cesar Trevelin
• Host Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil

Abstract

The objective of this study is to evaluate the efficiency of electrochemical gas diffusion electrodes (EDG), produced with pigments graphitic conductors and emulsion PTFE (polytetrafluoroethylene), modified with organometallic catalysts (zinc and nickel phthalocyanines) redox in the synthesis of hydrogen peroxide (H2O2) in situ, from the cathodic reduction of O 2 in aqueous medium. Initially, we intend to use the technique of microlayer porous mass obtained from the catalytic with variable contents of each catalyst, deposited on the surface of a rotating ring-disc electrode (RRDE), seeking a mechanistic study of the reduction reaction of O2 and evaluating the efficiency of each catalytic mass, modified or not with different amounts of organometallic phthalocyanines for the production of H2O2. The pasta electrocatalytic efficiency for the production of H2O2 are used to prepare these EDGM EDGM and will be tested for the electrochemical cell electrogeneration of H2O2. (AU)