Understanding the Active Sites of CO Hydrogenation on Pt–Co Catalysts Prepared Using Atomic Layer Deposition,The Journal of Physical Chemistry C

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Understanding the Active Sites of CO Hydrogenation on Pt–Co Catalysts Prepared Using Atomic Layer Deposition
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2018-01-18 00:00:00 , DOI: 10.1021/acs.jpcc.7b10541
Joseph A. Singh ₁ , Nuoya Yang ₂ , Xinyan Liu ₃ , Charlie Tsai ₃ , Kevin H. Stone ₄ , Bart Johnson ₄ , Ai Leen Koh ₅ , Stacey F. Bent ₃

Affiliation

The production of liquid fuels and industrial feedstocks from renewable carbon sources is an ongoing scientific challenge. Using atomic layer deposition together with conventional techniques, we synthesize Pt–Co bimetallic catalysts that show improvement for syngas conversion to alcohols. By combining reaction testing, X-ray diffraction, electron microscopy, and in situ infrared spectroscopy experiments, supported by density functional theory calculations, we uncover insights into how Pt modulates the selectivity of Co catalysts. The prepared Pt–Co catalysts demonstrate increased selectivity toward methanol and low molecular weight hydrocarbons as well as a modest increase in selectivity toward higher alcohols. The in situ infrared spectroscopic measurements suggest that these changes in selectivity result from an interplay between linear and bridging carbon monoxide configurations on the catalyst surface.

中文翻译：

了解使用原子层沉积法制备的Pt-Co催化剂上CO加氢的活性位点

从可再生碳源生产液体燃料和工业原料是一项持续的科学挑战。使用原子层沉积技术和常规技术，我们合成了显示出将合成气转化为醇类的改进的Pt-Co双金属催化剂。通过结合反应测试，X射线衍射，电子显微镜和原位红外光谱实验，并在密度泛函理论计算的支持下，我们发现了有关Pt如何调节Co催化剂选择性的见解。制备的Pt-Co催化剂显示出对甲醇和低分子量烃的选择性提高，并且对高级醇的选择性适度提高。在原位红外光谱测量表明，选择性的这些变化是由催化剂表面上线性和桥连的一氧化碳构型之间的相互作用引起的。

更新日期：2018-01-18

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