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CANCELLED: CHBE 565 Seminar, Prof. Maria Flytzani-Stephanopoulos, "Heterogeneous Catalyst Design at the Single-atom Limit for Efficient Production of Chemicals and Energy"

Event Type
Lecture
Sponsor
Chemical and Biomolecular Engineering and International Paper Co.
Date
Apr 26, 2018   2:00 pm  
E-Mail
cbowser@illinois.edu
Views
31
Originating Calendar
Chemical & Biomolecular Engineering Seminars and Events

Catalyst design and development aims at more efficient and sustainable chemical processes. To this end, identification of the active catalytic site and design of catalysts with 100% atom efficiency has been a long-standing goal in heterogeneous catalysis. A novel approach to reaching this goal through single-atom heterogeneous catalysts has emerged in the recent literature. Atomically dispersed supported metal catalysts offer better resource utilization and new prospects for low-cost fuel processing and green chemicals production.1,2 In this presentation, metal catalysts stabilized as isolated single atoms/cations on various supports will be reviewed drawing examples from a variety of reactions, including the low-temperature water-gas shift reactions,3-5 methanol steam reforming, and methanol and ethanol dehydrogenation reactions; direct methane conversion to oxygenates,6 and several selective hydrogenation reactions on single-atom alloys.7-9 We will demonstrate how reaction mechanisms involving single metal atoms/cations, transcend support structure and composition as long as the metal atom site, is allowed to form stably. A unique “signature” of the metal (Au, Pt, Pd, etc.) at the atomic state is preserved, distinct however from the corresponding extended metal catalyst.1,4,7-9 Novel synthesis methods will be discussed as will the stability of atomically dispersed catalysts in various supports and reaction environments.

  1. Flytzani-Stephanopoulos and Bruce Gates, Annu. Rev. Chem. Biomol. Eng. 2012, 3
  2. Liu, ACS Catal., 2017, 7, 34–59
  3. Fu et al., Science 2003, 301, 935
  4. Yang et al., Science 2014, 346, 1498
  5. Yang et al., J. Am. Chem. Soc. 2015, 137, 3470
  6. Shan, M. Li et al., Nature 2017, DOI: 10.1038/nature24640
  7. Kyriakou et al., Science 2012, 335, 1209
  8. Lucci, J. Liu et al., Nat. Commun. 2015, 6, 8550
  9. Liu et al., J. Am. Chem. Soc. 2016, 138 (20), pp 6396

 

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