This work investigates the feasibility of producing IrO₂-Ta₂O₅|Ti electrodes by electrodeposition. Using precursor solutions with Ir:Ta molar ratios from 0:100 to 100:0, followed by thermal treatment, the goal was to find the optimal composition for enhancing the formation of hydroxyl radicals and providing long service lives. Scanning electron microscopy (SEM), coupled with energy dispersive X-ray spectroscopy (EDX), revealed that the production of homogeneous coatings with a good surface coverage and absence of agglomerates was only possible for electrodes with 70% or 100% Ir. The potential for O₂ evolution was similar for all the electrodes containing Ir, at about 0.90 V vs Ag|AgCl. However, the ability to produce M(OH) clearly increased with increasing Ir in the Ir:Ta ratios (100:0 > 70:30 > 30:70 > 0:100). This observation was confirmed by the transformation of coumarin to 7-hydroxycoumarin as determined by spectroscopic and chromatographic techniques after treatment. Once manufactured and characterized, the electrodes were tested, as anodes, for the electro-oxidation of polycyclic aromatic hydrocarbons in aqueous solutions at natural pH (i.e., without pH adjustment). The anodes prepared from 70:30 and 100:0 ratios produced the fastest and highest removal, reaching 86% and 93% for phenanthrene and naphthalene, respectively, after 120 min at 50 mA. This was accompanied by a high degree of mineralization, as the result of direct and M(OH)-mediated oxidation, with some refractory intermediates remaining in the final solutions. The interaction between IrO₂ and Ta₂O₅ oxides appeared to be important. The 100:0 anode provided high electrocatalytic effectiveness, whereas the anode with the 70:30 ratio provided improved long-term stability, as confirmed by its service life of about 93 h.

这项工作研究了通过电沉积生产IrO ₂ -Ta ₂ O ₅ | Ti电极的可行性。使用Ir：Ta摩尔比为0：100至100：0的前体溶液，然后进行热处理，目的是找到一种最佳的成分，以增强羟基自由基的形成并延长使用寿命。扫描电子显微镜（SEM）结合能量色散X射线光谱（EDX）分析表明，只有具有70％或100％Ir的电极才能生产出具有良好表面覆盖率且不存在附聚物的均质涂层。对于所有含Ir的电极，O ₂析出的电势相似，相对于Ag | AgCl约为0.90V。但是，产生M（OH）明显随Ir：Ta比（100：0> 70:30> 30:70> 0：100）中Ir的增加而增加。通过处理后通过光谱和色谱技术确定的香豆素向7-羟基香豆素的转化证实了该观察结果。一旦制造和表征，就将电极作为阳极进行测试，以测试其在自然pH下（即不进行pH调节）下水溶液中多环芳烃的电氧化。以70:30和100：0的比例制备的阳极产生最快和最高的去除率，在50 mA下120分钟后，菲和萘的去除率分别达到86％和93％。由于直接和M（OH）介导的氧化反应，最终溶液中残留一些难熔的中间体。IrO ₂和Ta ₂ O ₅氧化物之间的相互作用似乎很重要。100：0阳极提供了高电催化效率，而比例为70:30的阳极则提供了改善的长期稳定性，这一点已被其约93 h的使用寿命所证实。