【摘要】 氢化物电极氢化反应的热力学参数可通过两种方法获得．结果表明，通过电化学反应得到ｅ－ ｃ－ Ｔ 曲线而计算出的热焓变ΔＨ、热熵变ΔＳ和氢压值比通过氢化反应（气态方法）得到的ｐ－ ｃ－ Ｔ 曲线而计算出的ΔＨ、ΔＳ及氢压值要高．由于低利用率，氢气向空气中扩散以及非密封电池电解液中氢气泡的结构等因素，用气态方法和电化学方法得到的贮氢容量也不同．除了研究电化学反应的ΔＨ０ｅ，ΔＳ０ｅ 与气态ΔＨ０ｐ，ΔＳ０ｐ 的关系外，以能斯特方程为基础，推导了ΔＨ０ｅ，ΔＳ０ｅ 的表达式，获得更为精确的值．更多还原

【Abstract】 Thermodynamic parameters of the hydriding reaction of a hydride electrode can be obtained by two different methods.The results show that the change of enthalpyΔH,change of entropy ΔS and hydrogen pressure calculated from e-c-T curves of electrochemical reactions have much larger inherent errors compared with thoes obtained from p-c-T curves of alloys in hydriding reactions with hydrogen gas (gaseous method).The hydrogen storage capacities determined by gaseous and electrochemical methods are also different,owing to the low utilization factor,and diffusion of hydrogen into air and formation of hydrogen gas bubbles in electrolyte in an unsealed battery.ΔH 0 e and ΔS 0 e as well as the relations between ΔH 0 e,ΔS 0 e of the electrochemical reaction and gaseous ΔH 0 p,ΔS 0 p have also been derived on the basis of the Nernst equation,Much more accurate results have thus been assured.更多还原