Title: Atomic Layer Deposition for Preparing Isolated Co Sites on SiO2 for Ethane Dehydrogenation Catalysis

Journal Article · · Nanomaterials
 [1];  [2];  [2];  [3]
  1. University of Pennsylvania, Philadelphia, PA (United States); University of Pennsylvania
  2. University of Pennsylvania, Philadelphia, PA (United States)
  3. University of Pennsylvania, Philadelphia, PA (United States); Catalysis Center for Energy Innovation, Newark, DE (United States)

Unlike Co clusters, isolated Co atoms have been shown to be selective for catalytic dehydrogenation of ethane to ethylene; however, preparation of isolated Co sites requires special preparation procedures. Here, we demonstrate that Atomic Layer Deposition (ALD) of tris(2,2,6,6-tetramethyl-3,5-heptanedionato)cobalt(III) (Co(TMHD)3) on silica and other supports is effective in producing these isolated species. Silica-supported catalysts prepared with one ALD cycle showed ethylene selectivities greater than 96% at 923 K and were stable when CO2 was co-fed with the ethane. Co catalysts prepared by impregnation formed clusters that were significantly less active, selective, and stable. Rates and selectivities also decreased for catalysts with multiple ALD cycles. Isolated Co catalysts prepared on Al2O3 and MgAl2O4 showed reasonable selectivity for ethane dehydrogenation but were not as effective as their silica counterpart.

Research Organization:
University of Pennsylvania, Philadelphia, PA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0001004
OSTI ID:
1595934
Journal Information:
Nanomaterials, Journal Name: Nanomaterials Journal Issue: 2 Vol. 10; ISSN 2079-4991; ISSN NANOKO
Publisher:
MDPICopyright Statement
Country of Publication:
United States
Language:
English

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