• 作者： Hwang, Bing-Joe; Shih, Kuo-Shyang; Chang, Ya-Wei
• 中文摘要： 本文主要探討由含鉛離子硝酸溶液中陽極沈積二氧化鉛模式受電位,鉛離子濃度及pH值之影響。電流響應可分為誘導期、表面活化及晶體成長、穩定晶體成長三個區域。表示沈積速率之電流在誘導期後會逐漸上升至一穩定值。低pH值、低鉛離子濃度、低電位會有長誘導期與表面活化及晶體成長期。穩定電流會隨電位、鉛離子濃度及pH值之增加而增加。由於引進可溶性吸附物與表面活化及晶體成長,所提模式可說明實驗結果,並描述含鉛離子硝酸溶液中陽極沈積二氧化鉛之行為。
• 英文摘要： A model for anodic deposition of lead dioxide from HNO/sub 3/ solution of Pb(II) on a platinum substrate was studied as a function of applied potential, concentration of Pb(II), and pH value. A chronoamperometric response (I-t) could be divided into three regions involving the induction region (I), the surface activation and crystal growth region (II), and the steady-state crystal growth region(III). Following the induction period, the current which represents the deposition rate of lead dioxide gradually rises to a steady-state value. Both a long induction period(T/sub 0/) and a long surface activation and crystal growth period (T/sub 1/) were observed to be associated with a low pH value, low concentration of Pb(II), and low applied potential. The steady-state current (I/sub ss/ ) increased with an increase in the concentration of Pb(II), pH value, and the applied potential. By introducing the concepts of adsorption of soluble reactant, surface activation and crystal growth, the model for anodic deposition of lead- dioxide was proposed for demonstrating the experimental results. The proposed model could describe the anodic deposition of PbO/sub 2/ from the solution of Pb( II) very well.
• 中文關鍵字： 誘導模型; 陽極沈積; 二氧化鉛; 表面活化; 晶體成長
• 英文關鍵字： Induction Model; Anodic Deposition; Lead Dioxide; Surface Activation; Crystal Growth