Size effect on thermodynamic parameters for the peanut-like CaMoO4 micro/nano reaction systems

Peanut-like CaMoO4 micro/nano structures with three different sizes were harvested by a simple reverse-microemulsion method at room temperature. Employing synthesized micro/nano CaMoO4 and HCl as reaction systems, thermodynamic parameters such as standard molar enthalpy of reaction Delta(r) H (m) (theta) , standard molar Gibbs free energy of activation Delta (r) (not equal) G (m) (theta) , standard molar enthalpy of activation Delta (r) (not equal) H (m) (theta) , and standard molar entropy of activation Delta (r) (not equal) S (m) (theta) were successfully acquired for the first time by in situ microcalorimetry. Furthermore, change regularities of the thermodynamic parameters for the micro/nano reaction systems were obtained and discussed. It demonstrated that size effect has significant influence on thermodynamic parameters of micro/nano material reaction systems.