Epitaxial stabilization of face selective catalysts

James A. Enterkin, Robert M. Kennedy, Junling Lu, Jeffrey W. Elam, Russell E. Cook, Laurence D. Marks, Peter C Stair, Christopher L. Marshall, Kenneth R Poeppelmeier

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Selective, active, and robust catalysts are necessary for the efficient utilization of new feedstocks. Face-selective catalysts can precisely modify catalytic properties, but are often unstable under reaction conditions, changing shape and losing selectivity. Herein we report a method for synthesizing stable heterogeneous catalysts in which the morphology and selectivity can be tuned precisely and predictably. Using nanocrystal supports, we epitaxially stabilize specific active phase morphologies. This changes the distribution of active sites of different coordination, which have correspondingly different catalytic properties. Specifically, we utilize the different interfacial free-energies between perovskite titanate nanocube supports with different crystal lattice dimensions and a platinum active phase. By substituting different sized cations into the support, we change the lattice mismatch between the support and the active phase, thereby changing the interfacial free-energy, and stabilizing the active phase in different morphologies in a predictable manner. We correlate these changes in active phase atomic coordination with changes in catalytic performance (activity and selectivity), using the hydrogenation of acrolein as a test reaction. The method is general and can be applied to many nanocrystal supports and active phase combinations.

Original languageEnglish
Pages (from-to)1829-1834
Number of pages6
JournalTopics in Catalysis
Volume56
Issue number18-20
DOIs
Publication statusPublished - Dec 2013

Fingerprint

Stabilization
Nanocrystals
Catalysts
Free energy
Acrolein
Lattice mismatch
Catalyst selectivity
Platinum
Crystal lattices
Perovskite
Feedstocks
Hydrogenation
Cations
Positive ions
perovskite

Keywords

  • Acrolein
  • Epitaxy
  • Heterogeneous catalysis
  • Hydrogenation
  • Perovskite
  • Platinum

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

Cite this

Enterkin, J. A., Kennedy, R. M., Lu, J., Elam, J. W., Cook, R. E., Marks, L. D., ... Poeppelmeier, K. R. (2013). Epitaxial stabilization of face selective catalysts. Topics in Catalysis, 56(18-20), 1829-1834. https://doi.org/10.1007/s11244-013-0118-y

Epitaxial stabilization of face selective catalysts. / Enterkin, James A.; Kennedy, Robert M.; Lu, Junling; Elam, Jeffrey W.; Cook, Russell E.; Marks, Laurence D.; Stair, Peter C; Marshall, Christopher L.; Poeppelmeier, Kenneth R.

In: Topics in Catalysis, Vol. 56, No. 18-20, 12.2013, p. 1829-1834.

Research output: Contribution to journalArticle

Enterkin, JA, Kennedy, RM, Lu, J, Elam, JW, Cook, RE, Marks, LD, Stair, PC, Marshall, CL & Poeppelmeier, KR 2013, 'Epitaxial stabilization of face selective catalysts', Topics in Catalysis, vol. 56, no. 18-20, pp. 1829-1834. https://doi.org/10.1007/s11244-013-0118-y
Enterkin JA, Kennedy RM, Lu J, Elam JW, Cook RE, Marks LD et al. Epitaxial stabilization of face selective catalysts. Topics in Catalysis. 2013 Dec;56(18-20):1829-1834. https://doi.org/10.1007/s11244-013-0118-y
Enterkin, James A. ; Kennedy, Robert M. ; Lu, Junling ; Elam, Jeffrey W. ; Cook, Russell E. ; Marks, Laurence D. ; Stair, Peter C ; Marshall, Christopher L. ; Poeppelmeier, Kenneth R. / Epitaxial stabilization of face selective catalysts. In: Topics in Catalysis. 2013 ; Vol. 56, No. 18-20. pp. 1829-1834.
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