无机添加物对β PbO_2-SPE复合膜电极结晶形貌及电催化活性的影响

Influence of Inorganic Additives on the Surface Crystal Structure and Electrocatalytic Activation of β PbO_2-SPE Composite Membrane Electrode

化学镀制βPbO2-SPE复合膜电极的过程中加入无机添加物Fe2+和Co2+可以改善膜电极的电催化性能。SEM和XRD测试表明,加入Fe2+和Co2+可使镀层结晶更细小、沉积更均匀、致密。阳极极化曲线测试证明,βPbO2/Co-SPE电极电化学反应的速度最快,另两种电极的反应速度相近。苯酚溶液中循环伏安测试证明,镀层析氧电位从高向低的排序是βPbO2/Co>PbO2/Fe>βPbO2,βPbO2/Co-SPE电极最适合用于降解有机污染物。电化学降解苯酚过程证明,βPbO2/Co-SPE电极的电催化活性远高于其它两种电极。

The surface crystal structure and electrocatalytic activation of βPbO2-SPE composite membrane electrode were improved when inorganic additives, Fe^2＋ and Co^2＋, were added into the electroless process. The SEM and XRD results showe that additives can make coating crystal grains more fine, uniform and compact. The polarization curves demonstration that reaction rate of β PbO2/Co-SPE membrane electrode is the fastest, and the another two electrode are similar. The cyclic vohammogram tests proved that order of oxygen evolution voltage of coating is：βPbO2/Co 〉 PbO2/Fe 〉βPbO2, and /βPbO2/Co-SPE is the most optimistic electrode in degradation phenol. The electrochemical degradation phenol results showed that electrocatalytic activation of β PbO2/Co-SPE electrode is higher than others.