Constructing PtLa@ZnBeta catalyst with single atomic Pt catalyzing propane dehydrogenation

Abstract

Zn has been found to be the most effective metal that geometrically and electrically modifies Pt by forming intermetallic alloy with Pt, whereas it suffers from gradual losing during the reaction caused by volatilization. Herein, we propose a strategy introducing La^3 + together with Pt²⁺ into the zeolite channels by ion-exchange that allow the La³⁺ anchoring onto zeolite framework Zn and acting as the successor of Zn by forming alloy with Pt whereby executing the task of isolating and stabilizing the Pt atoms when Zn lost during the PDH reaction. The 0.3Pt0.32La@3ZnBeta(L) catalyst prepared in this way displayed much superior catalytic performance in PDH reaction than that of anchoring Pt²⁺ cations alone onto framework Zn. It is worthy to extend this strategy to other metals that is capable of forming intermetallic alloy with Pt but possesses high boiling point, to develop highly active, selective and catalytic stable PDH catalysts.