open access publication

Article, 2022

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

Journal of Material Science and Technology, ISSN 1005-0302, 1941-1162, Volume 110, Pages 161-166, 10.1016/j.jmst.2021.08.063

Contributors

Sun, Jie [1] Liu, Chuangwei 0000-0002-8256-6053 [2] [3] Kong, Wenhan [1] Liu, Jie [1] Ma, Liangyu [1] Li, Song 0000-0002-9140-9973 [3] Xu, Yuanhong (Corresponding author) [1]

Affiliations

  1. [1] Qingdao University
    2. [NORA names: China; Asia, East];
  2. [2] Technical University of Denmark
    3. [NORA names: DTU Technical University of Denmark; University; Denmark; Europe, EU; Nordic; OECD];
  3. [3] Northeastern University
    4. [NORA names: China; Asia, East]

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.

Keywords

Faradaic efficiency, Fe3S4, FeS2, FeS2 microspheres, activity, calculations, catalyst, catalytic performance, catalytic properties, coordination, coordination number, current density, dehydrogenation, dehydrogenation step, density, density functional theory calculations, efficiency, efficient electrocatalysts, electrocatalysts, electrode, electrooxidation, electrooxidation of hydrazine, energy, free energy, functional theory calculations, high-performance catalysts, hydrazine, hydrazine oxidation, hydrogen electrode, hydrothermal strategy, iron-sulfur, metal sulfides, microspheres, one-step hydrothermal strategy, onset, onset oxidation potential, oxidation, oxidation of hydrazine, oxidation potential, peak current density, performance, potential, properties, rational design, reversible hydrogen electrode, stability, steps, strategies, sulfide, theory calculations, transition metal sulfides

Funders

  • National Natural Science Foundation of China

Data Provider: Digital Science

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