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Carbon Monoxide Oxidation Promoted by Surface Polarization Charges in a CuO/Ag Hybrid Catalyst.
Scientific Reports ( IF 3.8 ) Pub Date : 2020-02-13 , DOI: 10.1038/s41598-020-59531-0
Xijun Wang 1, 2 , Chuanyi Jia 3 , Edward Sharman 4 , Guozhen Zhang 1 , Xin Li 1 , Jun Jiang 1
Affiliation  

Composite structures have been widely utilized to improve material performance. Here we report a semiconductor-metal hybrid structure (CuO/Ag) for CO oxidation that possesses very promising activity. Our first-principles calculations demonstrate that the significant improvement in this system's catalytic performance mainly comes from the polarized charge injection that results from the Schottky barrier formed at the CuO/Ag interface due to the work function differential there. Moreover, we propose a synergistic mechanism underlying the recovery process of this catalyst, which could significantly promote the recovery of oxygen vacancy created via the M-vK mechanism. These findings provide a new strategy for designing high performance heterogeneous catalysts.

中文翻译:


CuO/Ag 混合催化剂中表面极化电荷促进的一氧化碳氧化。



复合材料结构已被广泛用于提高材料性能。在这里,我们报道了一种用于 CO 氧化的半导体-金属杂化结构(CuO/Ag),具有非常有前途的活性。我们的第一性原理计算表明,该系统催化性能的显着改善主要来自于由于功函数差异而在 CuO/Ag 界面处形成的肖特基势垒所产生的极化电荷注入。此外,我们提出了该催化剂恢复过程的协同机制,可以显着促进通过M-vK机制产生的氧空位的恢复。这些发现为设计高性能多相催化剂提供了新策略。
更新日期:2020-02-13
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