Deactivation of the dimensionally stable anode (DSA) restricts their long-term service in the harsh electrolysis industries. In this work, Ti/Ir_xPb_1–xO₂/RuIrSnO₂ electrodes with enhanced electrochemical stability were prepared by the thermal decomposition method. Compared with Ti/RuIrSnO₂ electrode (95 h), the accelerated service lifetime of Ti/Ir_0.7Pb_0.3O₂/RuIrSnO₂ electrode (245 h) was increased by 2.5 times. The increase of the Ir:Pb ratio in Ir_xPb_1–xO₂ interlayer enhanced the oxygen evolution reaction activity and stability of the interlayer to some extent. The electrochemical stability of the RuIrSnO₂ layer was closely associated with an electrochemical property of introduced Ir_xPb_1–xO₂ interlayers. This was because once the cracks in the electrode extended to the interlayer, the local defects with high oxygen evolution reaction activity tended to preferentially convert active oxygen species into O₂. It impeded the permeation of active oxygen species through oxide matrix to passivate the substrate. This work provided an effective strategy to prolong the service lifetime of DSA.

中文翻译：

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IrxPb1–xO2 析氧中间层用于增强尺寸稳定阳极的电化学稳定性


尺寸稳定的阳极 （DSA） 的失活限制了它们在恶劣的电解工业中的长期服务。在这项工作中，通过热分解法制备了具有增强电化学稳定性的 Ti/Ir_xPb_1–xO₂/RuIrSnO₂ 电极。与 Ti/RuIrSnO₂ 电极（95 h）相比，Ti/Ir_0.7Pb_0.3O₂/RuIrSnO₂ 电极的使用寿命（245 h）提高了 2.5 倍。Ir_xPb_1–xO₂ 夹层中 Ir：Pb 比的增加在一定程度上增强了析氧反应活性和夹层的稳定性。RuIrSnO₂ 层的电化学稳定性与引入的 Ir_xPb_1–xO₂ 夹层的电化学性质密切相关。这是因为一旦电极中的裂纹延伸到层间，具有高析氧反应活性的局部缺陷往往会优先将活性氧转化为 O₂。它阻碍了活性氧通过氧化物基质渗透以钝化基材。这项工作为延长 DSA 的使用寿命提供了一种有效的策略。