[Chem] 我室郑南峰教授发表论文:Catalysis Selects Its Own Favorite Facets

发布日期:2019年09月14日   浏览次数:

我室郑南峰教授在 Chem 上发表论文:Catalysis Selects Its Own Favorite Facets

文章链接:https://www.sciencedirect.com/science/article/pii/S2451929419303201

摘要:

The exposed surface of metal catalysts plays a crucial role in determining their overall (electro)catalytic performance, such as activity and selectivity, creating the so-called “facet effect.” The facet effect has been recently well-demonstrated in the metal-catalyzed electroreduction reaction of CO2 (CO2RR). For example, a small portion of Cu high-index stepped facets is demonstrated as the main contributor to the overall CO2RR activity.1 Studies based on both crystalline and polycrystalline Cu catalysts also reveal that different facets of Cu vary the product selectivity. Although Cu(111) produces more CH4 than Cu(100), stepped facets exhibit an activity one order higher than that of Cu(111) toward the C-C coupled products.2 The optimized facets for CO2RR vary with metal compositions and experimental conditions as well.3 For instance, the high-index facets of Bi, such as (012) and (104), exhibit high performance for the selective production of formate.4 Both single-crystal and thin-film studies revealed that Ag(110) having the larger density of undercoordinated sites exhibited higher activity than Ag(111) and Ag(100) in CO2 reduction to CO.5, 6