Electrooxidation of Mixed Ethanol and Methanol Solutions on PtSn/C Electrocatalysts Prepared by the Polymeric Precursor Method

Author(s)

Aline Amorim ^[1] ; Luanna S. Parreira ^[2] ; Júlio César M. Silva ^[3] ; Mauro C. dos Santos ^[4]

Affiliation

^[1] Universidade Federal do ABC. Centro de Ciências Naturais e Humanas. Laboratório de Eletroquímica e Materiais Nanoestruturados - Brasil

^[2] Universidade Federal do ABC. Centro de Ciências Naturais e Humanas. Laboratório de Eletroquímica e Materiais Nanoestruturados - Brasil

^[3] Universidade Federal do ABC. Centro de Ciências Naturais e Humanas. Laboratório de Eletroquímica e Materiais Nanoestruturados - Brasil

^[4] Universidade Federal do ABC. Centro de Ciências Naturais e Humanas. Laboratório de Eletroquímica e Materiais Nanoestruturados - Brasil

• Document type: Journal article
• Source: Journal of the Brazilian Chemical Society; v. 28, n. 6, p. 1091-1097, 2017-06-00.

Abstract

Different mass ratio proportions of PtSn (m/m) electrocatalysts with 20% metal loading on a carbon support were prepared for use in ethanol:methanol solutions oxidation reactions. PtSn/C (3:1) (91% alloy degree, lattice parameter of 0.399 nm and mean crystallite size 4.8 nm) presented the best activity for oxidation of mixed solutions. The highest normalized current (ethanol:methanol 80:20) was 4.2 mA mgPt-1 (measured after 1800 seconds at 0.5 V). Therefore, the PtSn/C (3:1) electrocatalyst with an atomic ratio of 65:35 enhanced both the electronic effect and bifunctional mechanism in (ethanol:methanol 80:20), which resulted in the formation of CO2 at low potentials, as well as the highest amount of by-products than ethanol and methanol. (AU)

• FAPESP's process: 15/10314-8 - Nanostructures for Phenol, Ciprofloxacin and 17±-ethinylestradiol Degradation
• Grantee: Mauro Coelho dos Santos
• Support Opportunities: Regular Research Grants
• FAPESP's process: 13/01577-0 - Development of materials and degradation studies of electrocatalysts and supports for alkaline fuel cell
• Grantee: Júlio César Martins da Silva
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 12/09664-6 - Study of the oxidation reactions of methanol, ethanol and mixtures of these alcohols using PtM (M=Sn/Ce) electrocatalysts
• Grantee: Aline Amorim
• Support Opportunities: Scholarships in Brazil - Scientific Initiation