The development of efficient and durable oxygen evolution reaction (OER) catalysts for energy-saving electrolytic hydrogen generation is highly attractive. In this communication, we report the development of an FeMoO₄ nanorod array on nickel foam (FeMoO₄/NF) via a facile hydrothermal process. As a 3D oxygen evolution reaction electrocatalyst, such FeMoO₄/NF shows superior catalytic activity with a geometrical catalytic current density of 50 mA cm⁻² at an overpotential of only 293 mV in 1.0 M KOH. Notably, this electrode also shows good long-term electrochemical durability with a high turnover frequency value of 0.43 mol O₂ s⁻¹ at an overpotential of 390 mV. This study provides us an attractive cost-effective 3D catalyst material in water-splitting devices for efficient and durable water oxidation at alkaline pH.

中文翻译：

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FeMoO ₄纳米棒阵列：用于碱性条件下水氧化的高活性3D阳极†

开发高效耐用的氧气析出反应（OER）催化剂以节省能源以产生电解氢非常有吸引力。在此交流中，我们报告了通过简便的水热工艺在泡沫镍（FeMoO ₄ / NF）上开发FeMoO ₄纳米棒阵列的过程。作为3D析氧反应电催化剂，FeMoO ₄ / NF在1.0M KOH中仅293mV的超电势下具有50mA cm ^-2的几何催化电流密度，显示出优异的催化活性。值得注意的是，该电极还显示出良好的长期电化学耐久性，具有0.43 mol O ₂ s ^-1的高周转频率值在390 mV的超电势下。这项研究为我们在水分解装置中提供了一种有吸引力的具有成本效益的3D催化剂材料，可在碱性pH值下有效且持久地进行水氧化。