| Ni-Fe-Al合金制备雷尼镍催化剂的研究 |
| A STUDY ON THE RANEY NICKEL CATALYSTS PREPARED FROM Ni-Fe-Al ALLOYS |
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| 摘要: 使用不同铁含量的Ni-Fe-Al合金前体制取雷尼镍催化剂。X-射线衍射表明，铁的加入改变了Ni-Al合金的体相结构，穆斯堡尔谱测定表明铁在前体中以零价存在，在雷尼镍催化剂中以Fe(Ⅲ)存在，经573 KH2还原生成Fe-Ni合金。微分吸附量热表明，Fe-Ni合金的形成抑制了雷尼镍催化剂对H2和CO的吸附。 |
| 关键词: 雷尼镍催化剂 吸附量热 穆斯堡尔谱 |
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| Abstract: Raney nickel catalysts with different iron content were prepared from the Ni-Fe-Al precursors. X-ray diffraction showed that the addition of iron influenced the bulk structure of the raw alloy. Mossbauer spectroscopy indicated that iron existed as metal in the as-prepared samples. However, the iron was oxidized to Fe(Ⅲ) during the leaching by sodium hydroxide solution to form corresponding Raney catalysts. Upon treatment in H2 at 573K, the iron could be reduced to Fe(0), forming Fe-Ni alloy on the surface of the catalysts, which greatly decreased the adsorption of H2 and CO, as evidenced by the adsorptive microcalorimetry. |
| Keywords: Raney nickel catalyst microcalorimetric adsorption Mossbauer spectroscopy |
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| 王益,沈俭一.Ni-Fe-Al合金制备雷尼镍催化剂的研究[J].无机化学学报,1997,13(3):320-324. |
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