Progressive formation of active and stable PtZn bimetallic nanoclusters by exsolution during propane dehydrogenation

PtZn bimetallic nanoclusters on two-dimensional (2D) molecular sieves are attractive catalysts for propane dehydrogenation (PDH) owing to the ease of molecular diffusion, resistance to deactivation by coke deposition, and electronic promotion by Zn. Here, we report the progressive formation of highl...

Full description

Bibliographic Details
Published in:Chemical Engineering Journal
Main Authors: Min, Hyung-Ki, Oh, Sohun, Kim, Young Woo, Kim, Eun-Jeong, Kweon, Sungjoon, Lee, Siyeon, Park, Kwangho, Jung, Kwang-Deog, Cha, Seung Hyeok, Yun, Gwang-Nam, Park, Min Bum, Shin, Chae-Ho
Format: Article in Journal/Newspaper
Language:unknown
Published: ELSEVIER SCIENCE SA 2023
Subjects:
DML
Online Access:https://scholarworks.unist.ac.kr/handle/201301/64475
https://doi.org/10.1016/j.cej.2023.143241
Description
Summary:PtZn bimetallic nanoclusters on two-dimensional (2D) molecular sieves are attractive catalysts for propane dehydrogenation (PDH) owing to the ease of molecular diffusion, resistance to deactivation by coke deposition, and electronic promotion by Zn. Here, we report the progressive formation of highly active PtZn bimetallic nanoclusters on a Pt-modified zincosilicate with 2D delaminated MWW layers (PtZn-DML) under PDH condi-tions. The exsolution of Zn from the zincosilicate DML framework during PDH generates highly dispersed PtZn active sites and reduces the Lewis acidity of zincosilicate DML support, resulting in a high propane conversion (40.3%) comparable to thermodynamic equilibrium as well as extraordinary stability with a low deactivation rate (kd < 0.002 h-1) up to 13.6 days.

Similar Items