Electrosynthesis and performance of WC and Co3O4 co-doped α-PbO2 electrodes
Electrosynthesis and performance of WC and Co3O4 co-doped α-PbO2 electrodes
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DOI：
10.1039/c5ra23444a
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发表时间：
2016-01
期刊：
影响因子：
3.9
通讯作者：
Shi-wei He;R. Xu;G. Hu;B. Chen
中科院分区：
文献类型：
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作者：
Shi-wei He;R. Xu;G. Hu;B. Chen
采用阳极共沉积法在镀铅铝基体上制备了α-PbO 2-WC（Co 3 O 4）复合镀层。采用阳极极化技术研究了α-PbO 2电沉积过程中粒子浓度和搅拌速度的影响。研究了所制备电极的主要物理和电化学性能。利用X射线衍射仪（XRD）、扫描电镜（SEM）和X射线能谱仪（EDS）分析了复合沉积层的表面形貌和晶体结构。实验结果表明，WC或Co 3 O 4颗粒的共沉积降低了α-PbO 2的电沉积速率，但并未改变α-PbO 2的电沉积机理。在α-PbO 2层中掺杂WC或Co 3 O 4颗粒可以提高复合阳极的析氧电催化活性，掺杂WC颗粒可以提高阳极的耐腐蚀性能。WC颗粒具有细化晶粒和防止Co 3 O 4颗粒团聚的作用，而Co 3 O 4颗粒则能改变α-PbO 2的择优取向。
An α-PbO2–WC(Co3O4) composite layer was successfully prepared on a lead-coated aluminum substrate by an anodic co-deposition method. The influence of particle concentration and stirring rate was investigated by an anodic polarization technique in the process of α-PbO2 electrodeposition. The major physical and electrochemical properties of the prepared electrode were investigated. The surface morphology and crystal structure of the composite deposition layers were analyzed by X-ray diffraction (XRD), scanning electronic microscopy (SEM) and X-ray spectroscopy (EDS). The experimental data showed that the co-deposition of WC or Co3O4 particles can reduce the α-PbO2 electrodeposition rate; however, the mechanism of α-PbO2 electrodeposition is not changed. The oxygen evolution electrocatalytic activity of the composite anodes can be improved by doping WC or Co3O4 particles into the α-PbO2 layer, and the corrosion resistance of the anode can be improved by the doped WC particles. The WC particles have the ability to refine the grains and prevent the agglomeration of Co3O4 particles, while the Co3O4 particles can change the preferred orientation of α-PbO2.