The Mechanism of Potassium Promoter: Enhancing the Stability of Active Surfaces

摘要

Owing to their outstanding effect on improving catalytic reactivity, alkali-metal promoters have been widely used in industry and extensively studied in academia. Potassium-promoted iron catalysts for Fischer-Tropsch synthesis (FTS) and ammonia synthesis are the most representative examples of this effect. Owing to the complexity of real catalytic systems, the microscopic understanding of the alkali-metal promotion effect is still an elusive and challenging subject.