Physicochemical Stabilization of Pt against Sintering for a Dehydrogenation Catalyst with High Activity, Selectivity, and Durability

Cited 52 time in webofscience Cited 0 time in scopus
  • Hit : 299
  • Download : 0
Suppressing irreversible catalyst deactivation is critical in heterogeneous catalysis. In particular, deactivation via sintering of active sites is a significant issue for reactions involving harsh reaction/regeneration conditions. In this work, we developed a PtGa/gamma-Al2O3 alkane dehydrogenation catalyst with exceptionally high activity, selectivity, and long-term stability by markedly suppressing Pt sintering under harsh conditions (reaction/regeneration at >823 K). To stabilize Pt, physical and chemical stabilization strategies were synergistically combined. For the former, Pt was introduced during the synthesis of gamma-Al2O3 via sol gel chemistry, which can increase the interfacial contact between Pt and gamma-Al2O3 due to the partial entrapment of Pt in gamma-Al2O3. For the latter, atomically dispersed Ce was doped on gamma-Al2O3, which can stabilize Pt via strong Pt-O-Ce interactions. Because of effective Pt stabilization, the catalyst showed remarkably steady activity and selectivity behaviors over the repeated reaction cycles, although the catalyst is regenerated via simple oxidation rather than industrially used oxychlorination. The Pt stabilization strategies reported in this work can be applied to other metal-catalyzed reactions that involve severe reaction/regeneration conditions.
Publisher
AMER CHEMICAL SOC
Issue Date
2016-05
Language
English
Article Type
Article
Citation

ACS CATALYSIS, v.6, no.5, pp.2819 - 2826

ISSN
2155-5435
DOI
10.1021/acscatal.6b00329
URI
http://hdl.handle.net/10203/209523
Appears in Collection
CBE-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 52 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0