Iron(II) molybdate
Chemical compound
From Wikipedia, the free encyclopedia
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]
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| Names | |
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| IUPAC name
Iron(II) molybdate | |
| Other names
Iron molybdate | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| FeMoO4 | |
| Molar mass | 215.78 g/mol |
| Appearance | Dark 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] | |
Heat capacity (C) |
118.5 J/mol K |
Std enthalpy of formation (ΔfH⦵298) |
−1075 kJ/mol |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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]