Iron(II) molybdate

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Iron(II) molybdate
FerrousMolybdate.jpg
Names
IUPAC name
Iron(II) molybdate
Other names
Iron molybdate
Identifiers
3D model (JSmol)
ChemSpider
PubChem CID
  • InChI=1S/Fe.Mo.4O/q+2;;;;2*-1
    Key: QQOCLJJWXLOEJE-UHFFFAOYSA-N
  • [O-][Mo](=O)(=O)[O-].[Fe+2]
Properties
FeMoO4
Molar mass 215.78 g/mol
AppearanceDark brown, yellow solid [1]
Density 5.6 g/cm3 (20 °C)
Melting point 1,115 °C (2,039 °F; 1,388 K)
0.00766 g/100 mL (20 °C)
0.038 g/100 mL (100 °C)
Structure [2]
Monoclinic
P21 (No. 4)
a = 15.693 Å, b = 9.235 Å, c = 18.218 Å
α = 90°, β = 125.21°, γ = 90°
Thermochemistry[ citation needed ]
118.5 J/mol K
−1075 kJ/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Iron(II) molybdate is an inorganic compound with the chemical formula FeMoO4. It is a dark brown to yellow solid forming monoclinic crystals. [1] [2]

Contents

Synthesis

Iron(II) molybdate is precipitated by the reaction of iron(II) chloride or iron(II) sulfate [3] and sodium molybdate.

Na2MoO4 + FeSO4 → Na2SO4 + FeMoO4
Na2MoO4 + FeCl2 → 2 NaCl + FeMoO4

Applications

FeMoO4 has been used as relatively stable active material for anodes in Li-ion batteries for conversion reaction, [4] as anode material in aqueous supercapacitors due to fast redox reactions [3] and as catalyst for oxygen evolution in alkaline solutions. [5]

References

  1. 1 2 Perry, Dale L. (2016-04-19). Handbook of Inorganic Compounds. CRC Press. p. 215. ISBN   978-1-4398-1462-8.
  2. 1 2 Rapposch, M. H.; Anderson, J. B.; Kostiner, E. (2002-05-01). "Crystal structure of ferric molybdate, Fe2(MoO4)3". ACS Publications. doi:10.1021/ic50213a065 . Retrieved 2026-01-25.
  3. 1 2 Senthilkumar, Baskar; Kalai Selvan, Ramakrishnan (2014-07-15). "Hydrothermal synthesis and electrochemical performances of 1.7 V NiMoO4⋅xH2O||FeMoO4 aqueous hybrid supercapacitor". Journal of Colloid and Interface Science. 426: 280–286. doi:10.1016/j.jcis.2014.04.010. PMID   24863794.
  4. ↑ Zhang, Zhenyu; Li, Wenyue; Ng, Tsz-Wai; Kang, Wenpei; Lee, Chun-Sing; Zhang, Wenjun (2015-10-13). "Iron(ii) molybdate (FeMoO4) nanorods as a high-performance anode for lithium ion batteries: structural and chemical evolution upon cycling". J. Mater. Chem. A. 3 (41): 20527–20534. doi:10.1039/c5ta05723j. ISSN   2050-7496.
  5. ↑ Singh, R. N.; Singh, J. P.; Singh, A. (2008-08-01). "Electrocatalytic properties of new spinel-type MMoO4 (M = Fe, Co and Ni) electrodes for oxygen evolution in alkaline solutions". International Journal of Hydrogen Energy. 33 (16): 4260–4264. Bibcode:2008IJHE...33.4260S. doi:10.1016/j.ijhydene.2008.06.008.
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