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Self-supported iron-doped nickel sulfide as efficient catalyst for electrochemical urea and hydrazine oxidation reactions

Title
Self-supported iron-doped nickel sulfide as efficient catalyst for electrochemical urea and hydrazine oxidation reactions
Author(s)
Samdani, Jitendra ShashikantSanetuntikul, JakkidShanmugam, Sangaraju
Issued Date
2022-07
Citation
International Journal of Hydrogen Energy, v.47, no.64, pp.27347 - 27357
Type
Article
Author Keywords
ElectrocatalystFe-doped Ni3S2HydrazineHydrazine oxidationHydrogen boostingUrea oxidation
Keywords
ELECTROLYTIC HYDROGEN-PRODUCTIONOXIDE-BASED CATALYSTSBIFUNCTIONAL ELECTROCATALYSTENERGY-EFFICIENTEVOLUTION REACTIONWATER-OXIDATIONALKALINE MEDIAFOAMNANOSHEETSDESIGN
ISSN
0360-3199
Abstract
The electrochemical oxidation of urea and hydrazine over self-supported Fe-doped Ni3S2/NF (Fe–Ni3S2/NF) nanostructured material is presented. Among the various reaction conditions Fe–Ni3S2/NF-2 prepared at 160 °C for 8 h using 0.03 mM Fe(NO3)3 shows the best results for the hydrazine and urea oxidation reactions. The potential values of 0.36, 1.39, and 1.59 V are required to achieve the current density of the 100 mA cm−2 in 1 M hydrazine (Hz), 0.33 M urea, and 1 M KOH electrolyte, respectively. The onset potential in 1 M KOH, 0.33 M Urea +1 M KOH, and 1 M Hz + 1 M KOH values are 1.528, 1.306, and 0.176 respectively. The Fe–Ni3S2/NF-2 shows stable performance at 10 mA cm−2 until 50 h and at 60 mA cm−2 over the 25 h. A cell of PtC//Fe–Ni3S2/NF-2 requires the potential of 0.49, 1.46, and 1.59 V for the hydrogen production in 1 M Hz + 1 M KOH, 0.33 M Urea +1 M KOH, and 1 M KOH electrolyte, respectively, at a current density of 10 mA cm−2, and almost 90% stable for the hydrogen production over the 80 h in all electrolytes. The improvement of the chemical kinetics of urea and hydrazine oxidation is due to the synergistic effect of the adsorption and fast electron transfer reaction on Fe–Ni3S2/NF-2. The doped Fe ion facilitates the fast electron transfer and the surface of Ni3S2 support to the urea and hydrazine molecule adsorption. © 2022 Hydrogen Energy Publications LLC
URI
http://hdl.handle.net/20.500.11750/17289
DOI
10.1016/j.ijhydene.2022.06.073
Publisher
Pergamon Press Ltd.
Related Researcher
  • 상가라쥬샨무감 Shanmugam, Sangaraju 에너지공학과
  • Research Interests Electrocatalysts for fuel cells; water splitting; metal-air batteries; Polymer electrolyte membranes for fuel cells; flow batteries; Hydrogen generation and utilization
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Department of Energy Science and Engineering Advanced Energy Materials Laboratory 1. Journal Articles

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