Abstract High activity, stability, and affordability are the main properties of electrocatalysts for oxygen evolution reaction (OER), which make them good candidates for replacing precious catalysts, such as IrO2 and RuO2, and thus provide a solution for preparing renewable energy, including water-splitting and rechargeable metal-air batteries. Here, we report an impressive electrocatalytic activity for the OER by cerium-doped nickel‑cobalt layered double hydroxide (Ce-doped NiCo-LDH) nanohybrid grown on a scaffold of carbon nanotube (CNT). The structure and morphology of the Ce-doped NiCo-LDH catalyst were analyzed by TEM, FESEM, EDS, XRD, FTIR, TGA, BET, and Raman techniques. The catalyst displayed excellent electrochemical performance in water oxidation. The prepared electrode at the current density of 10 mA cm−2 showed the overpotential (η) of 236 mV and the Tafel slope was 56 mV dec−1 in the 1 M KOH. The NiCoCe-LDH/CNT nanohybrid exhibited higher electrocatalytic activity and durability for oxygen evolution than the commercially costly metal Ir and Ru catalysts.

中文翻译：

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基于 Ce 掺杂的镍钴层状双氢氧化物在碳纳米管上生长的高性能电极可有效析氧

摘要 高活性、稳定性和经济性是析氧反应 (OER) 电催化剂的主要特性，使其成为替代贵重催化剂如 IrO2 和 RuO2 的良好候选者，从而为制备可再生能源，包括水提供解决方案。 -分裂和可充电金属空气电池。在这里，我们报告了在碳纳米管 (CNT) 支架上生长的掺铈镍钴层状双氢氧化物（Ce 掺杂 NiCo-LDH）纳米杂化物对 OER 的令人印象深刻的电催化活性。通过TEM、FESEM、EDS、XRD、FTIR、TGA、BET和拉曼技术分析了Ce掺杂NiCo-LDH催化剂的结构和形貌。该催化剂在水氧化中表现出优异的电化学性能。在 10 mA cm-2 的电流密度下制备的电极在 1 M KOH 中显示出 236 mV 的过电位 (η) 和 Tafel 斜率为 56 mV dec-1。与商业昂贵的金属 Ir 和 Ru 催化剂相比，NiCoCe-LDH/CNT 纳米杂化物表现出更高的电催化活性和析氧耐久性。