Double-edged roles of dynamic evolution and microenvironments in supported catalysts for propane dehydrogenation.

Non-oxidative propane dehydrogenation (PDH) has emerged as a promising alternative to conventional petroleum-based propylene production. Supported catalysts, featuring highly dispersed metal active species anchored on tailored supports, have been widely explored for PDH applications. During the dehydrogenation process, the dynamic evolution and local microenvironments of supported metal species act as a "double-edged sword", exerting both positive and negative influences on catalytic performance. In this minireview, we systematically discuss these double-edged roles arising from dynamic evolution processes of catalysts and microenvironmental effects in supported PDH catalysts, specifically focusing on surface coke deposition, in situ transformation and migration of supported metal species, and hydroxyl-engineered support microenvironments. Current challenges and future perspectives for the development of high-performance supported PDH catalysts are also provided.