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采用沉积-沉淀法和诱导-还原沉积法制备了碳纳米管(CNTs)负载的金属Co和非晶态CoP合金,并将其应用于PH3分解反应.同时,通过XRD、TEM、XPS、BET等一系列检测手段,对制备样品的相结构、形貌、组分和比表面积进行了表征.结果发现,反应过程中,Co/CNTs生成了高活性的金属磷化物CoP,而CoP/CNTs生成了CoP和Co2P两种金属磷化物.研究表明,Co/CNTs较CoP/CNTs显示出更高的催化活性和稳定性.高温还原预处理方式可提高Co/CNTs在PH3分解反应前期的活性,而低温还原的预处理方式有利于CoP/CNTs保持较高的催化活性,减轻样品的失活程度.
Metallic Co and amorphous CoP alloy supported on carbon nanotubes (CNTs) were prepared by deposition-precipitation method and induction-reduction deposition method, and applied to the decomposition reaction of PH3. Meanwhile, XRD, TEM, XPS, BET, etc. A series of detection methods were used to characterize the phase structure, morphology, composition and specific surface area of the prepared samples. The results showed that Co / CNTs produced highly active metal phosphide CoP and CoP / CNTs CoP and Co2P.The results show that Co / CNTs exhibit higher catalytic activity and stability than CoP / CNTs.High temperature reduction pretreatment can increase the activity of Co / CNTs in the pre-PH3 decomposition reaction, while the low temperature The reduction pretreatment method is conducive to CoP / CNTs to maintain a high catalytic activity, reduce the degree of inactivation of the sample.