The thermal decomposition of NiC2O4 center dot 2H(2)O: An in situ TP-XRD and TGA/FT-IR study

The non-isothermal decomposition of NiC2O4 . 2H(2)O was investigated under a dynamic inert atmosphere using a temperature-programmed X-ray diffractome ter (TP-XRD) and a thermogravimetric analyzer coupled to a Fourier-transfor m infrared spectrometer (TGA-FTIR). Both solid and gaseous products were an alyzed in situ. The XRD pattern of the dehydration product did not match da ta for NiC2O4 reported in the JCPDS file. The thermal decomposition of the dehydration product (NiC2O4) took place in two sub-steps, both of which inv olved CO2 evolution. Metallic nickel was the final product.