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以纳米铜为例,首次采用电化学方法获取纳米材料的热力学函数.通过电化学沉积法制备了粒子尺寸约80nm的纳米铜电极,测定纳米铜与块体铜电极的电势差,以块体铜的热力学函数值为参考标准,根据纳米铜与块体铜的热力学关系式,求得纳米铜的标准摩尔生成焓、标准摩尔生成吉布斯自由能、标准摩尔熵分别为5.16kJmol-1、0.216kJmol-1、49.75JK-1mol-1,同时,求得纳米铜可逆电池反应的热效应为-4.95kJmol-1.
Taking nanocopper for example, the thermodynamic function of nanomaterials was obtained by electrochemical method for the first time.The nanocopper electrode with particle size of about 80nm was prepared by electrochemical deposition method, the potential difference between nanocopper and monolithic copper electrode was measured, According to the thermodynamic relationship between copper nanoparticle and bulk copper, the standard molar enthalpy of formation of copper nanocrystal is obtained. The standard molar Gibbs free energy is obtained. The standard molar entropies are respectively 5.16kJmol-1 and 0.216kJmol -1,49.75JK-1mol-1, at the same time, obtain the thermal effect of nano-copper reversible battery reaction -4.95kJmol-1.