Rational design of FeS2 microspheres as high-performance catalyst for electrooxidation of hydrazine

Jie Sun, Chuangwei Liu, Wenhan Kong, Jie Liu, Liangyu Ma, Song Li, Yuanhong Xu*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

Abstract

Inspired by the relatively recognized performance of transition metal sulfides in the oxidation of hydrazine, the catalytic properties of FeS2 and Fe3S4 are compared via the density functional theory calculations. Due to the different coordination numbers of iron-sulfur, the free energies of the dehydrogenation steps on FeS2 are far less than those on Fe3S4, which led to the much better catalytic performance of FeS2. Accordingly, FeS2 microspheres are rationally proposed as a more efficient electrocatalyst for hydrazine oxidation, which is then prepared by a facile one-step hydrothermal strategy. Such FeS2 microspheres show great activity for hydrazine oxidation with an onset oxidation potential of 0.22 V vs. reversible hydrogen electrode, and a peak current density of 16 mA cm−2. Meanwhile, stability and high faradaic efficiency (3.5e/N2H4) is obtained for hydrazine oxidation to N2.
Original languageEnglish
JournalJournal of Materials Science and Technology
Volume110
Pages (from-to)161–166
Number of pages6
ISSN1005-0302
DOIs
Publication statusPublished - 2022

Keywords

  • Rational design
  • Hydrazine electrooxidation
  • FeS2 microspheres
  • Electrochemistry

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