In this paper, CoO[Formula: see text]Co2P composite nanocatalysts as highly active catalysts were successfully prepared for catalytic hydrolysis of sodium borohydride (NaBH[Formula: see text] to generate hydrogen. For catalyst preparation, pre-synthesized Co(OH)2 nanosheets were uniformly mixed with sodium hypophosphite (NaH2PO[Formula: see text] and then treated through vapor-phase phosphorization process. For characterization, field-emission scanning electron microscopy (FE-SEM), energy dispersive spectrometry (EDS), X-ray diffraction (XRD), N2 adsorption–desorption measurement and X-ray photoelectric spectroscopy (XPS) were carried out, and traditional water-displacement method was performed to measure the hydrogen generation rate (HGR). It was found that component and catalytic activity of the composites were greatly affected by the ratio of Co(OH)2 to NaH2PO2. When the ratio was 2:1, the obtained catalyst composed of CoO and Co2P presented the highest HGR up to 3.94[Formula: see text]L min[Formula: see text] g[Formula: see text] using a 2[Formula: see text]wt.% NaBH[Formula: see text][Formula: see text]wt.% NaOH solution at [Formula: see text]C, and the apparent activation energy was detected as low as 27.4[Formula: see text]kJ mol[Formula: see text]. Additionally, the optimum CoO[Formula: see text]Co2P catalyst still retains 60% of the initial activity after recycling four times.

中文翻译：

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CoO-Co2P复合纳米片作为硼氢化钠水解制氢的高活性催化剂

在本文中，CoO[公式：见正文]Co2成功制备了P复合纳米催化剂作为高活性催化剂，用于催化水解硼氢化钠（NaBH[分子式：见正文]产生氢气。对于催化剂的制备，预合成的Co(OH)2纳米片与次磷酸钠（NaH2PO[公式：见正文]，然后通过气相磷化工艺处理。对于表征，场发射扫描电子显微镜 (FE-SEM)、能量色散光谱法 (EDS)、X 射线衍射 (XRD)、N2进行了吸附-脱附测量和X射线光电光谱（XPS），并采用传统的水置换法测量氢气产生率（HGR）。发现复合材料的组分和催化活性受Co(OH)的比例影响很大。2对 NaH2采购订单2. 当比例为2:1时，得到的催化剂由CoO和Co组成2P 呈现最高 HGR 高达 3.94[公式：见文]L min[公式：见文] g[公式：见文]使用 2[公式：见文]wt.% NaBH[公式：见文][公式: 见文]wt.% NaOH 溶液在[公式: 见文]C, 检测到表观活化能低至27.4[公式: 见文]kJ mol[公式: 见文]。此外，最优 CoO[公式：见正文]Co2P催化剂循环四次后仍保留60%的初始活性。