DSA (dimensionally stable anodes)-type electrodes (TiO₂-RuO₂-WO₃/Ti) were prepared by the thermal decomposition of proper metal precursor on titanium substrate. Electrochemical and corrosion characteristics of these electrodes were determined in [Fe(CN)₆]³⁻/[Fe(CN)₆]⁴⁻ system and Na₂SO₄ solution with the application of cyclic voltammetry and chronoamperometry. The electrode active surface area and the activity towards oxygen evolution were evaluated. Moreover, corrosion resistance of the tested electrodes was estimated by determination of basic corrosion parameters. The introduction of WO₃ into the oxide layer of the electrodes resulted in a decrease in electrode active surface area and in the number of active sites. The modified electrodes revealed lower activity towards OER but higher activity in organic oxidation. However, their stability was significantly higher in comparison with the non-modified electrode. Corrosion characteristics of the tested electrodes proved the highest corrosion resistance in the case of the electrode modified with 3% WO₃. The modification of TiO₂-RuO₂/Ti with WO₃ seems to be advantageous in the application in electrochemical and photoelectrochemical degradation of organic pollutants.

Open image in new window

通过适当的金属前驱体在钛基体上的热分解，制备了DSA（尺寸稳定阳极）型电极（TiO ₂ -RuO ₂ -WO ₃ / Ti）。通过循环伏安法和计时电流法在[Fe（CN）₆ ] ³⁻ / [Fe（CN）₆ ] ⁴⁻体系和Na ₂ SO ₄溶液中测定了这些电极的电化学和腐蚀特性。评估电极活性表面积和对放氧的活性。此外，通过确定基本腐蚀参数来估计被测电极的耐腐蚀性。WO ₃的介绍进入电极的氧化物层导致电极活性表面积和活性部位数量的减少。修饰的电极显示出较低的OER活性，但有机氧化活性更高。但是，与未修饰的电极相比，它们的稳定性明显更高。在用3％WO ₃改性的电极的情况下，被测电极的腐蚀特性证明具有最高的耐腐蚀性。用WO ₃改性TiO ₂ -RuO ₂ / Ti似乎在有机污染物的电化学和光电化学降解中的应用中是有利的。

在新窗口中打开图像