Electroconversion of glycerol in alkaline medium: From generation of energy to formation of value-added products

Autor(es)

Da Silva, Rodrigo Garcia ; Neto, Sidney Aquino ; Kokoh, Kouakou Boniface ; De Andrade, Adalgisa Rodrigues

• Tipo de documento: Artigo Científico
• Fonte: Journal of Power Sources; v. 351, p. 174-182, MAY 31 2017.
• Citações Web of Science: 21

Resumo

We have investigated the electroconversion of glycerol in alkaline medium using bimetallic M50@Pt50 nanocatalysts (where M = Ru, Sn or Ni) supported on multi-walled carbon nanotubes. The electrocatalysts have been synthesized via an electrostatically oriented co-reduction method in which self assembly of the positively charged metal species (Sn, Ni and Ru) into the internal catalyst level and of the negatively charged platinum species towards the outer layer afford nanocatalysts with the desired morphology. The physicochemical characterizations have confirmed the atomic ratios, the metal loadings, and the spherical shape of the nanoparticles with average diameter lying between 2 and 3 nm. In terms of electrochemical performance, the Ni@Pt composition displays the highest electrochemically active surface area, the best relation between the peak current and the onset oxidation potential in the presence of glycerol (275 mA mg(pt)(-1) and -492 mV vs. Hg/HgO/OH-), and the most remarkable electrochemical stability in chronoamperometric tests. Long-term experiments to evaluate the oxidation of glycerol and analysis of the products indicate that the different electrocatalysts synthesized herein efficiently perform the electroconversion of glycerol at high rates and generate of value-added products. (C) 2017 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 12/07464-0 - Síntese e aplicação de nanocatalisadores baseados em morfologia core-shell para a eletro-oxidação de alcoóis em meio alcalino.
• Beneficiário: Rodrigo Garcia da Silva
• Modalidade de apoio: Bolsas no Brasil - Doutorado