Abstract In this paper, we propose a novel promising route for the direct synthesis of nanoscale iridium and tin oxide nanolayers by a successive ionic layer deposition method (SILD). The precursors for the synthesis included an aqueous solution of SnF2 with an equilibrium pH value and the colloidal solution of IrOx∙nH2O nanoparticles and Na2[Ir(OH)6] mixture with pH = 10.5, obtained by the alkaline hydrolysis of the H2IrCl6 solution. The synthesized nanoscale oxide exhibited electrocatalytic properties in the oxygen evolution reaction (OER) upon water splitting in the acidic medium. A series of samples were obtained, synthesized as a result of 10, 30, and 50 SILD processing cycles. It was found that the films obtained as a result of 30 SILD cycles and heated in argon at a temperature of 300 °C had the best electrocatalytic properties in the reaction of oxygen evolution in the HClO4 solution. For these films, the overpotential value at a current density of 10 mA/cm2 was 288 mV and the Tafel coefficient value totaled 56 mV/dec. Investigations by SEM, TEM, EDX, XRD, XPS and FTIR spectroscopy revealed that the samples were built of Ir0.7SnOx∙nH2O amorphous nanoparticles with a size of 10–20 nm. For this kind of electrode, estimation of the specific mass of iridium showed that its amount is about 0.02 mg/cm2. It is suggested that the new synthetic method may serve as the basis for creating a wide range of coatings for electrodes in electrochemical devices, including electrochemical sensors, electrical stimulators, electrochromic devices, etc.

中文翻译：

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钛表面纳米级铱和氧化锡的直接连续离子层沉积在酸性介质中水电解过程中的析氧反应中的电催化应用

摘要 在本文中，我们提出了一种通过连续离子层沉积法 (SILD) 直接合成纳米级氧化铱和氧化锡纳米层的新途径。合成的前体包括具有平衡 pH 值的 SnF2 水溶液和 IrOx∙nH2O 纳米颗粒和 Na2[Ir(OH)6] 混合物的胶体溶液，pH = 10.5，通过 H2IrCl6 溶液的碱性水解获得。合成的纳米级氧化物在酸性介质中分解水后在析氧反应（OER）中表现出电催化性能。获得了一系列样品，合成了 10、30 和 50 个 SILD 处理循环。发现作为 30 次 SILD 循环的结果并在 300 °C 的氩气中加热获得的薄膜在 HClO4 溶液中析氧反应中具有最好的电催化性能。对于这些薄膜，电流密度为 10 mA/cm2 时的过电位值为 288 mV，塔菲尔系数值总计为 56 mV/dec。通过 SEM、TEM、EDX、XRD、XPS 和 FTIR 光谱的研究表明，样品由 Ir0.7SnOx∙nH2O 无定形纳米颗粒构成，尺寸为 10-20 nm。对于这种电极，估计铱的比质量显示其量约为 0.02 mg/cm2。建议新的合成方法可以作为为电化学设备中的电极创建广泛涂层的基础，包括电化学传感器、电刺激器、