摘要：In this paper the Bi? ligand(pyridine 2 carboxylic acid) system was studied by direct current sampled polarography (DC _ TAST) at a fixed ratio of total ligand to total metal concentration and changing pH. The polarographic experimental complex formation curve (ECFC) and the theoretical complex formation curve (TCFC) were used for modelling the metal ligand system and optimizing stability constants. The ECFC, in which experimental parameters of polarography are included (a shift in a half wave potential and a variation in a diffusion controlled limiting current), appears to be a characteristic function for a particular metal ligand system. The TCFC is a theoretical curve calculated for the designed metal ligand model from mass balance equation. Five bismuth complexes MHL, ML, ML2, ML3 and ML3(OH) with their stability constants as logβ 7.54± 0.10, 7.50± 0.02, 13.91± 0.04, 18.15± 0.03 and 26.75± 0.02, respectively, are reported.

摘要：应用离子敏感电极和示差脉冲极谱两种实验技术,对镉-甘胺酸络合物体系进行研究,并通过一种联合的数学处理方法,使两种实验数据可以用来设计金属络合物体系模型及计算络合物的稳定常数.在相同的实验条件下(如总的络合剂浓度和总的金属离子浓度相同),两种实验技术将会得到几乎相同的实验络合物形成曲线和理论络合物形成曲线.将联合的数学处理方法应用于镉-甘胺酸络合物体系,不但验证了文献报道的三种络合物 ML、ML_2和 ML_3的存在,还发现了两种新的络合物 MHL 和 ML_2(OH),并且优化得到了这五种络合物的稳定常数.

摘要：根据各种金属与氢原子形成M—H键的强度不同,设计并制备不同组成的二元合金电极。重点探讨了电极材料的组成与电催化性能之间的相互关系,可通过调节电极表面吸附氢原子的能力,降低析氢反应的活化能,提高整个过程的反应速度,减小析氢反应的过电位。