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首页> 外文期刊>Catalysis science & technology >Tuning the metal-support interaction in supported K-promoted NiMo catalysts for enhanced selectivity and productivity towards higher alcohols in CO hydrogenation
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Tuning the metal-support interaction in supported K-promoted NiMo catalysts for enhanced selectivity and productivity towards higher alcohols in CO hydrogenation

机译：调优的金属支撑交互的支持K-promoted尼莫地平的催化剂增强对高选择性和生产力醇在CO加氢

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摘要

Mixed metal oxide (MMO)-supported MoS2 catalysts with tunable size and morphology of active phases for higher alcohol synthesis (HAS) were prepared by using encapsulated Mo-based precursors with cetyltrimethylammonium bromide (CTAB). The Ni-KMoS/MMO catalysts show enhanced activity and superior selectivity towards higher alcohols to those prepared by the multiple impregnation method and co-impregnation method. That is, the K, Ni-30Mo/MMO catalyst exhibits a high space time yield (STY) of 253 mg per g catalyst per h for C2+ alcohols, which is about 3.2 and 1.51 times higher than those of IM-K, Ni30Mo/MMO and co-IM-K, Ni-30Mo/MMO. The compromise between the dispersion and stacking of supported MoS2 slabs via adjusting the metal-support interaction is crucial to providing abundant Mo edges for dispersing Ni species to achieve more accessible active sites. The remarkable increase in the number of highly dispersed and contacted NiSx and Ni-KMoSx dual active sites will provide highly effective synergism, and thus gives this catalyst enhanced activity and exceptional selectivity towards higher alcohols in CO hydrogenation.
机译：混合金属氧化物(MMO)支持二硫化钼催化剂可调大小和形态的活跃阶段更高的酒精合成(已经)准备通过使用封装Mo-based前兆cetyltrimethylammonium溴铵(CTAB)。Ni-KMoS / MMO显示增强的活性和催化剂对高醇优良的选择性这些由多个浸渍法和co-impregnation法。K, Ni-30Mo / MMO催化剂表现出高的空间时间收益率(妓院)253毫克每克催化剂/ hC2 +醇,这大约是3.2和1.51倍比IM-K Ni30Mo / MMO和co-IM-K Ni-30Mo / MMO。色散和支持的二硫化钼叠加板通过调整金属支架相互作用提供丰富的帽边的关键实现更容易分散镍物种活跃的网站。数量的高度分散和NiSx和联系网站将提供高度Ni-KMoSx双重活跃有效的合作,从而使这种催化剂增强的活动和特殊的选择性对高级醇加氢。

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