Highly active and selective nickel molybdenum catalysts for direct hydrazine fuel cell

Tristan Asset, Aaron Roy, Tomokazu Sakamoto, Monica Padilla, Ivana Matanovic, Kateryna Artyushkova, Alexey Serov, Frederic Maillard, Marian Chatenet, Koichiro Asazawa, Hirohisa Tanaka, Plamen Atanassov

Research output: Contribution to journalArticlepeer-review

61 Scopus citations

Abstract

Carbon-supported NiMo catalysts (NiMo/C) were synthesized and investigated for the electrooxidation of hydrazine. Their morphology and composition were determined with physicochemical characterizations (TEM-EDS, XPS and XRD) and further bridged to their electrocatalytic activity. The electrochemical performances measured in rotating disk electrode experiments reached 7.68 ± 0.96 kA gmetal−1 for hydrazine electrooxidation at E = 0.4 V vs. RHE for the carbon-supported NiMo (9:1)/C. This value is amongst the highest reported in the literature. The large activity of the carbon-supported NiMo (9:1)/C catalyst was ascribed to the effect of a low but non-negligible (<15 at. %) molybdenum content, as molybdenum atoms stabilize the hydrazine N-N bond, thereby preventing the chemical decomposition of hydrazine into ammonia, and improving the catalyst selectivity towards the complete (and desired) hydrazine oxidation into N2 gas.

Original languageEnglish
Pages (from-to)420-426
Number of pages7
JournalElectrochimica Acta
Volume215
DOIs
StatePublished - Oct 10 2016
Externally publishedYes

Funding

VASP license was provided through Theoretical division, LANL, which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC52-06NA25396. Computational work was performed using the computational resources of EMSL , a national scientific user facility sponsored by the Department of Energy's Office of Biological and Environmental Research and located at Pacific Northwest National Laboratory, NERSC , supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231, and CNMS , sponsored at Oak Ridge National Laboratory by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy. MC thanks the French University Institute for funding.

Keywords

  • Ammonia Generation
  • Direct Hydrazine Fuel Cell
  • Molybdenum
  • Ni-based catalyst
  • Nickel

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