The Synergistic Effect of CuZnCeOx in Controlling the Formation of Methanol and CO from CO2 Hydrogenation,ChemCatChem

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The Synergistic Effect of CuZnCeOx in Controlling the Formation of Methanol and CO from CO2 Hydrogenation
ChemCatChem ( IF 3.8 ) Pub Date : 2018-08-14 , DOI: 10.1002/cctc.201800668
Xiaosong Hu ₁ , Wei Qin ₁ , Qingxin Guan ₁ , Wei Li _{1,

2}

Affiliation

CO₂ hydrogenation will be essential for a sustainable society if methanol and CO can be efficiently obtained using appropriate catalysts. In this paper, a highly efficient CuZnCeO_x catalyst was synthesized using a parallel flow coprecipitation method, and was evaluated in CO₂ hydrogenation to produce methanol and CO. Interestingly, the catalyst shows excellent activity and stability, and the selectivity of the products can be controlled by the amount of CeO_x. Characterization results show that a significant synergistic effect between Cu and metal oxides (ZnO and/or CeO_x) was observed at the composite catalysts. Cu plays a critical role in the activation of H₂, and CeO_x strongly adsorbs CO₂. CeO_x improved the dispersion of Cu nanoparticles and promoted the spillover of atomic hydrogen, which was beneficial to the generation of methanol. Meanwhile, ZnO exhibited weak adsorption ability for CO₂, which was beneficial for the generation of CO. In addition, ZnO can significantly improve the dispersion of the CeO_x nanoparticles. Both the dispersion of active sites and the activation abilities of CO₂ are critical for catalyst activity and product selectivity. Thus, the ternary catalyst CuZnCeO_x shows higher performance than the binary catalysts (CuZnO_x and CuCeO_x) in the CO₂ hydrogenation reaction. This paper provides a viable way to produce selectively methanol or CO from CO₂ hydrogenation.

中文翻译：

CuZnCeOx协同控制CO2加氢形成甲醇和CO的协同作用

CO ₂加氢可以为可持续发展的社会是必不可少的，如果可以使用适当的催化剂可以有效地获得甲醇和CO。在本文中，一个高效的CuZnCeO _X催化剂是使用平行流共沉淀法合成的，并且在CO评价₂氢化以制造甲醇和CO。有趣的是，该催化剂显示出优异的活性和稳定性，和产品的选择性可由CeO _x的量控制。表征结果表明，在复合催化剂上，铜与金属氧化物（ZnO和/或CeO _x）之间具有明显的协同作用。Cu在H ₂和CeO _x的活化中起关键作用强烈吸附CO ₂。CeO _x改善了Cu纳米粒子的分散性，并促进了原子氢的溢出，这有利于甲醇的生成。同时，ZnO对CO _2的吸附能力较弱，这有利于CO的生成。此外，ZnO可以显着改善CeO _x纳米颗粒的分散性。活性位点的分散和CO ₂的活化能力对于催化剂活性和产物选择性都至关重要。因此，三元催化剂CuZnCeO _x在CO _2中显示出比二元催化剂（CuZnO _x和CuCeO _x）更高的性能。氢化反应。本文提供了一种可行的方法，可以通过CO ₂加氢选择性地生产甲醇或CO 。

更新日期：2018-08-14

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