Nanostructured copper–cobalt based spinel for the electrocatalytic H2O2 reduction reaction

Narayan Chandra Deb Nath, Trishna Debnath, Eun Kyung Kim, Md Aftab Ali Shaikh, Jae Joon Lee

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

Nanostructured copper–cobalt based spinel [(Cu0.30Co0.70)Co2O4] was employed as an electrocatalyst in the hydrogen peroxide (H2O2) reduction reaction (HRR). Both nanoparticles and nanoneedles co-existed in the (Cu0.30Co0.70)Co2O4 spinel, which exhibited a high intrinsic electrical conductivity and surface-to-volume ratio, resulting therefore in a large electrochemically active surface area for the HRR. In addition, (Cu0.30Co0.70)Co2O4 showed an onset potential at approximately −0.14 V in the HRR, with a limiting current density of ∼104 mA/cm2 at −0.43 V. The synthesised material followed the direct HRR pathway and exhibited good stability. In addition, the HRR activity of (Cu0.30Co0.70)Co2O4 was comparable to that of commercial Pt/C electrodes. The present results therefore demonstrate the significant potential of (Cu0.30Co0.70)Co2O4 for future applications in fuel cells as a cathode catalyst.

Original languageEnglish
Pages (from-to)474-482
Number of pages9
JournalElectrochimica Acta
Volume273
DOIs
StatePublished - 20 May 2018

Keywords

  • And fuel cell
  • Copper–cobalt based spinel
  • Electrochemically active surface area
  • Hydrogen peroxide reduction reaction

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