Sugarcane vinasse-derived nanoporous N-S-doped carbon material decorated with Co: A new and efficient multifunctional electrocatalyst

André L. Cazetta, Lucas Spessato, Sandra A.R. Melo, Karen C. Bedin, Tao Zhang, Tewodros Asefa, Taís L. Silva, Vitor C. Almeida

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Vinasse has been successfully used as carbon and non-metals precursor for the synthesis of N-S-doped nanoporous carbon materials. The procedure involves the hydrothermal treatment of vinasse (HTV), and subsequent physical activation with CO2 in absence (VP) and presence of cobalt (VPCo). The N2 physisorption and SEM images showed the development of porous in the material, with BET surface area values ranging from 7.17 (HTV) to 734 m2 g−1 (VPCo), and the formation of carbon-spheres. Spectroscopy techniques (FTIR and XPS) demonstrated the insertion of nitrogen and sulfur elements, as well as the presence of cobalt into the carbon lattice. The electrocatalytic activity experiments toward the oxygen reduction and evolution reactions, and hydrazine oxidation reaction were superior for VPCo, which gave onset values of 0.91, 1.60 and 0.36 V vs. RHE, respectively. Additionally, VP was selective for H2O2, while VPCo catalyzed ORR via a four-electron pathway.

Original languageEnglish
Pages (from-to)9669-9682
Number of pages14
JournalInternational Journal of Hydrogen Energy
Volume45
Issue number16
DOIs
Publication statusPublished - Mar 20 2020

Keywords

  • Electrocatalysis
  • Hydrothermal treatment
  • Novel carbon material
  • Physical activation

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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