One‐Step Synthesis of NiMn‐Layered Double Hydroxide Nanosheets Efficient for Water Oxidation,Small Methods

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One‐Step Synthesis of NiMn‐Layered Double Hydroxide Nanosheets Efficient for Water Oxidation
Small Methods ( IF 10.7 ) Pub Date : 2018-11-02 , DOI: 10.1002/smtd.201800344
Ruiqi Li ₁ , Yuqian Liu ₁ , Haobo Li ₂ , Man Zhang ₁ , Yiran Lu ₃ , Lin Zhang ₃ , Jianping Xiao ₂ , Frank Boehm ₄ , Kai Yan ₁

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Layered double hydroxides (LDHs) are noble metal–free 2D materials promising for water oxidation. One‐step synthesis of ultrathin NiMn‐LDHs nanosheets is successfully achieved at room temperature avoiding the multiple tedious steps (e.g., hydrothermal treatment, exfoliation). The as‐prepared NiMn‐LDHs (1.3 nm thickness) exhibit the twofold enhancement of the activity and a reduction of overpotential by 80 mV at 10 mA cm⁻² in comparison with the traditional NiMn‐LDHs in 0.1 m NaOH, which is superior to the previously reported LDH‐derived electrocatalysts. The combination of theoretical and experimental results manifest that the largely enhanced electrocatalytic water oxidation activity of NiMn‐LDHs nanosheets is associated with the highly exposed active sites with a nearly optimal intermediates (*OH and *O) adsorption energy.

中文翻译：

NiMn层状双氢氧化物纳米片的一步法合成，可高效水氧化

层状双氢氧化物（LDH）是不含贵金属的2D材料，有望用于水氧化。在室温下成功地完成了超薄NiMn-LDHs纳米片的一步合成，避免了繁琐的步骤（例如水热处理，剥离）。与传统的NiMn-LDHs在0.1 m中相比，制备的NiMn-LDHs（1.3 nm厚度）在10 mA cm ^-2时具有两倍的活性增强和80 mV的过电势降低。NaOH优于以前报道的LDH衍生的电催化剂。理论和实验结果的结合表明，NiMn-LDHs纳米片的电催化水氧化活性大大增强，与高度暴露的活性位有关，具有几乎最佳的中间体（* OH和* O）吸附能。

更新日期：2018-11-02

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