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Title: Understanding oxidative dehydrogenation of ethane on Co3O4 nanorods from density functional theory

Journal Article · · Catalysis Science and Technology
DOI:https://doi.org/10.1039/c6cy00749j· OSTI ID:1437014
 [1];  [2];  [1]
  1. Univ. of California, Riverside, CA (United States). Dept. of Chemistry
  2. Univ. of Kansas, Lawrence, KS (United States). Dept. of Chemical and Petroleum Engineering and Dept. of Chemistry

Co3O4 is a metal oxide catalyst with weak, tunable M–O bonds promising for catalysis. Here, density functional theory (DFT) is used to study the oxidative dehydrogenation (ODH) of ethane on Co3O4 nanorods based on the preferred surface orientation (111) from the experimental electron-microscopy image. The pathway and energetics of the full catalytic cycle including the first and second C–H bond cleavages, hydroxyl clustering, water formation, and oxygen-site regeneration are determined. We find that both lattice O and Co may participate as active sites in the dehydrogenation, with the lattice-O pathway being favored. Here, we identify the best ethane ODH pathway based on the overall energy profiles of several routes. We identify that water formation from the lattice oxygen has the highest energy barrier and is likely a rate-determining step. This work of the complete catalytic cycle of ethane ODH will allow further study into tuning the surface chemistry of Co3O4 nanorods for high selectivity of alkane ODH reactions.

Research Organization:
Univ. of California, Riverside, CA (United States). Dept. of Chemistry
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0014561
OSTI ID:
1437014
Journal Information:
Catalysis Science and Technology, Vol. 6, Issue 18; ISSN 2044-4753
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 34 works
Citation information provided by
Web of Science

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Cited By (3)

Facet‐Dependent Activity of Co 3 O 4 Catalyst for C 3 H 8 Combustion journal October 2019
Low-temperature activation of methane on doped single atoms: descriptor and prediction journal January 2018
FeCrAlloy Monoliths Coated with Ni/Al2O3 Applied to the Low-Temperature Production of Ethylene journal July 2018

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