A novel method for preparing unsupported Ni₂P(x) (x = reduction temperature) catalysts at low temperature (500 °C) was proposed, in which the nickel citrate was used as a source of nickel. The nickel citrate can greatly increase surface area of Ni₂P catalyst, and promote formation of much smaller and highly dispersed uniform Ni₂P particles, exposure of more active Ni sites on the surface of Ni₂P(x)-L. The Ni₂P(500)-L which reduced at 500 °C exhibited the greatest HDS activity, the DBT conversion of which reached 95.6%, this is an increase of 33.5% when compared to that of the Ni₂P.

中文翻译：

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低温下高表面积无载体Ni ₂ P催化剂的新型合成

提出了一种 在低温（500°C）下制备无载体Ni ₂ P（x）（x =还原温度）催化剂的新方法，其中柠檬酸镍用作镍的来源。柠檬酸镍可大大增加Ni ₂ P催化剂的表面积，并促进形成更小且高度分散的均匀Ni ₂ P颗粒，并在Ni ₂ P（x）-L的表面上暴露更多的活性Ni位。在500°C下还原的Ni ₂ P（500）-L表现出最大的HDS活性，其DBT转化率达到95.6％，与Ni ₂ P相比，增加了33.5％。