【摘要】 本文研究钛基镍-钴氧化物（Ti/Ni-Co-O）电极在电解盐水过程中的耐蚀性和进行析氧反应的稳定性,分析探讨了该电极性能衰减的原因.在300gdm^-3NaCl水溶液中,于电流密度200mA·cm^-2下电解数小时后,溶液经原子吸收分光光度法检测,证明存在镍、钴离子,其溶解速度大于文献中钌-钛阳极中钌的溶解速度,镍钴含量之比大于涂液中两成分之比.该电极在1MKOH 溶液进行析氧反应时具有长期的稳定性,在0.5M K₂SO₄溶液中也比钌-钛电极寿命长.实验结果说明镍-钴氧化物在酸性溶液中的化学不稳定性是其析氯或析氧活性衰减的根本原因,针对钌-钛阳极设计的析氧反应标准快速寿命检测不适于评价钛基镍-钴氧化物电极.更多还原

【Abstract】 This paper reports the corrosion resistance of nickel-cobalt oxide of titanium support（Ti/Ni-Co-O）eletrode during electrotysis of brine and its durability as an oxygen evolution anode.The Cause,for the anodic perrformance decay of this electrode has been analyzed The Ti/Ni-Co-O electrodes were subjected to electrolysis test at a current density of 200mA.cm^-2in 300g.dm^-3NaCl for different time.The atonfic absorption spectroscopic analysis of the NaCl solution after the electrolysis test revealed the presence of Ni and Co ions. The dissolution rates of these two ions were greater than the dissolution rates for Ru reported in the reference.The molar ratio of Ni to Co was much greater than that in coating solution. The Ti/Ni-Co-O electrode has long-term durability for evolving oxygen reaction in 1M KOH. The durability in 0.5M K₂SO₄ was also longer than that of Ru-Ti electrodes.The experiment results show that the root cause for the activity decay of Ti/Ni-Co-O electrode during chlorine or oxygen evolution process is the chemical unstability of nickel-cobalt oxide in acid solution. The standard fast durability test based on the oxygen evolution reaction which is unfavourable to Ru-Ti electrode is unsuited for evaluating the Ti/Ni-Co-O electrode.更多还原