Cobalt(II) phosphate explained
Cobalt phosphate is the inorganic compound with the formula Co3(PO4)2. It is a commercial inorganic pigment known as cobalt violet.[1] Thin films of this material are water oxidation catalysts.[2]
Preparation and structure
The tetrahydrate Co3(PO4)2•4H2O precipitates as a solid upon mixing aqueous solutions of cobalt(II) and phosphate salts.[3] [4] Upon heating, the tetrahydrate converts to the anhydrous material. According to X-ray crystallography, the anhydrous Co3(PO4)2 consists of discrete phosphate anions that link centres. The cobalt ions occupy both octahedral (six-coordinate) and pentacoordinate sites in a 1:2 ratio.[5] [6]
See also
Notes and References
- Hugo Müller, Wolfgang Müller, Manfred Wehner, Heike Liewald "Artists' Colors" in Ullmann's Encyclopedia of Industrial Chemistry 2002, Wiley-VCH, Weinheim.
- Matthew W. Kanan . Yogesh Surendranatha . Daniel G. Nocera . Cobalt–phosphate oxygen-evolving Compound . Chem. Soc. Rev. . 2009 . 38 . 1 . 109–114 . 10.1039/B802885K . 19088970.
- Book: 10.1002/14356007.a07_281.pub2 . Cobalt and Cobalt Compounds . Ullmann's Encyclopedia of Industrial Chemistry . 2005 . Donaldson . John Dallas . Beyersmann . Detmar . 9783527303854 .
- Sankar . Selvasundarasekar Sam . Rathishkumar . Arumugam . Geetha . Kathiresan . Kundu . Subrata . 2020-10-15 . A Simple Route for the Synthesis of Cobalt Phosphate Nanoparticles for Electrocatalytic Water Oxidation in Alkaline Medium . Energy & Fuels . 34 . 10 . 12891–12899 . 10.1021/acs.energyfuels.0c02809 . 224960926 . 0887-0624.
- Anderson, J. B. . Kostiner, E. . Miller, M. C. . Rea, J. R. . Crystal structure of cobalt orthophosphate Co3(PO4)2 . Journal of Solid State Chemistry . 1975 . 14 . 4 . 372–377 . 10.1016/0022-4596(75)90058-4 . 1975JSSCh..14..372A.
- Structure refinements of Co3(PO4)2. A Note on the Reliability of Powder Diffraction Studies . Nord, A. G. . Stefanidis, T. . Acta Chemica Scandinavica A . 1983 . 37 . 715–721 . 10.3891/acta.chem.scand.37a-0715. free.
