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Doubly Decorated Platinum–Gallium Intermetallics as Stable Catalysts for Propane Dehydrogenation
Author(s) -
Nakaya Yuki,
Xing Feilong,
Ham Hyungwon,
Shimizu Kenichi,
Furukawa Shinya
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202107210
Subject(s) - dehydrogenation , catalysis , intermetallic , propane , platinum , nanoparticle , materials science , chemistry , chemical engineering , inorganic chemistry , nanotechnology , metallurgy , organic chemistry , alloy , engineering
Propane dehydrogenation (PDH) is a promising chemical process that can satisfy the increasing global demand for propylene. However, the Pt‐based catalysts that have been reported thus far are typically deactivated at ≥600 °C by side reactions and coke formation. Thus, such catalysts possess an insufficient life. Herein, we report a novel catalyst design concept, namely, the double decoration of PtGa intermetallics by Pb and Ca, which synergize the geometric and electronic promotion effects on the catalyst stability, respectively. Pb is deposited on the three‐fold Pt 3 sites of the PtGa nanoparticles to block them, whereas Ca, which affords an electron‐enriched single‐atom‐like Pt 1 site, is placed around the nanoparticles. Thus, PtGa−Ca−Pb/SiO 2 exhibits an outstandingly high catalytic stability, even at 600 °C ( k d =0.00033 h −1 , τ =3067 h), and almost no deactivation of the catalyst was observed for up to 1 month for the first time.