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Citation: SHAN Hai-wei CHEN Dong-hua TANG Wan-jun, . Thermodynamics and Thermal Analysis Kinetics of MC₂O₄ (M=Mn, Fe, Co, Ni, Cu, Zn)[J]. Acta Physico-Chimica Sinica, ;2005, 21(09): 1001-1005. doi: 10.3866/PKU.WHXB20050912 shu

Thermodynamics and Thermal Analysis Kinetics of MC₂O₄ (M=Mn, Fe, Co, Ni, Cu, Zn)

SHAN Hai-wei CHEN Dong-hua TANG Wan-jun ,
^, ,
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1.
Hubei Key Laboratory for Catalysis and Material Science, College of Chemistry and Material Science, South-Central University for Nationalities, Wuhan 430074

Corresponding author: , ,
Received Date: 17 January 2005
Available Online: 15 September 2005

Thermodynamics and Kinetics of MC₂O₄ (M=Mn, Fe, Co, Ni, Cu, Zn) were studied in N₂ or O₂ using DSC and TGA techniques. In N₂, the dehydration temprature Tde and enthalpy of dehydration ΔdeHm show “Two Group Domino Effect” along with atomic number Zre；ΔdeHm fluctuates in the range of (96.46±7.00) kJ•mol^-1；the decomposition temperature Td of MC₂O₄•2H₂O (M=Mn, Fe, Ni) and enthalpy have very od linearity along with atomic number Zre. When forming oxide MO in oxygen, decomposition enthalpy of MC₂O₄ (M=Co, Ni, Cu) shows a beeline along with atomic number Zre. All the reactions, except the dehydration of NiC₂O₄•2H₂O and the decomposition FeC₂O₄, belong to the same mechanism of random nucleation and growth, with integral form , and differential form .
- DSC;TG;Oxalate;Transition elements;Atom number;Thermodynamics; Thermal analysis kinetics
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Thermodynamics and Thermal Analysis Kinetics of MC₂O₄ (M=Mn, Fe, Co, Ni, Cu, Zn)