CAJ | 학술논문

用计时库仑法研究了Pb2+于旋转Ag盘电极(Ag-RDE)上的欠电位沉积(UPD)性质。实验证明，支持电解质(0.01 mol/LHN03+0.01 mol/L NaCl)中Cl-离子的存在有利于取得稳态条件下UPD-Pb的电量值。其氧化过程电量(Qa)，代表Pb2+吸附单层被定量转化为UPD Pb单层的量，Qa的平均值为393.3μC/cm2，相应于2×10-9 mol/cm2 Pb2+表面复盖量。
용계시고륜법연구료Pb2+우선전Ag반전겁(Ag-RDE)상적흠전위침적(UPD)성질。실험증명，지지전해질(0.01 mol/LHN03+0.01 mol/L NaCl)중Cl-리자적존재유리우취득은태조건하UPD-Pb적전량치。기양화과정전량(Qa)，대표Pb2+흡부단층피정량전화위UPD Pb단층적량，Qa적평균치위393.3μC/cm2，상응우2×10-9 mol/cm2 Pb2+표면복개량。
The monolayer charge of lead underpotential deposition (UPD) was studied by chronocoulometry. On the rotating silver disk electrode (Ag-RDE), the monolayer charge of UPD lead could reaches steady state at different Pb2+ concentration levels by changing reduction time of UPD Pb2+ . A supporting electrolyte solution of 0.01 mol/L HNO3 + 0.01 mol/L NaCl was used. The steady state charge measured was 393.3 μC/cm2, which corresponded to a surface cover of 2 × 10-9 mol/cm2 Pb2+ on the electrode surface.