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Title: Low-temperature CO oxidation over a ternary oxide catalyst with high resistance to hydrocarbon inhibition

Abstract

Platinum group metal (PGM) catalysts are the current standard for control of pollutants in automotive exhaust streams. Aside from their high cost, PGM catalysts struggle with CO oxidation at low temperatures (<200 °C) due to inhibition by hydrocarbons in exhaust streams. Here we present a ternary mixed oxide catalyst composed of copper oxide, cobalt oxide, and ceria (dubbed CCC) that outperforms synthesized and commercial PGM catalysts for CO oxidation in simulated exhaust streams while showing no signs of inhibition by propene. Diffuse reflectance IR (DRIFTS) and light-off data both indicate low interaction between propene and the CO oxidation active site on this catalyst, and a separation of adsorption sites is proposed as the cause of this inhibition resistance. In conclusion, this catalyst shows great potential as a low-cost component for low temperature exhaust streams that are expected to be a characteristic of future automotive systems.

Authors:
 [1];  [1];  [2];  [2];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1247937
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Angewandte Chemie (International Edition)
Additional Journal Information:
Journal Volume: 54; Journal Issue: 45; Journal ID: ISSN 1433-7851
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; CO oxidation; emissions control; heterogeneous catalysis; IR spectroscopy; transition metals

Citation Formats

Binder, Andrew J., Toops, Todd J., Unocic, Raymond R., Parks, II, James E., and Dai, Sheng. Low-temperature CO oxidation over a ternary oxide catalyst with high resistance to hydrocarbon inhibition. United States: N. p., 2015. Web. doi:10.1002/anie.201506093.
Binder, Andrew J., Toops, Todd J., Unocic, Raymond R., Parks, II, James E., & Dai, Sheng. Low-temperature CO oxidation over a ternary oxide catalyst with high resistance to hydrocarbon inhibition. United States. https://doi.org/10.1002/anie.201506093
Binder, Andrew J., Toops, Todd J., Unocic, Raymond R., Parks, II, James E., and Dai, Sheng. 2015. "Low-temperature CO oxidation over a ternary oxide catalyst with high resistance to hydrocarbon inhibition". United States. https://doi.org/10.1002/anie.201506093. https://www.osti.gov/servlets/purl/1247937.
@article{osti_1247937,
title = {Low-temperature CO oxidation over a ternary oxide catalyst with high resistance to hydrocarbon inhibition},
author = {Binder, Andrew J. and Toops, Todd J. and Unocic, Raymond R. and Parks, II, James E. and Dai, Sheng},
abstractNote = {Platinum group metal (PGM) catalysts are the current standard for control of pollutants in automotive exhaust streams. Aside from their high cost, PGM catalysts struggle with CO oxidation at low temperatures (<200 °C) due to inhibition by hydrocarbons in exhaust streams. Here we present a ternary mixed oxide catalyst composed of copper oxide, cobalt oxide, and ceria (dubbed CCC) that outperforms synthesized and commercial PGM catalysts for CO oxidation in simulated exhaust streams while showing no signs of inhibition by propene. Diffuse reflectance IR (DRIFTS) and light-off data both indicate low interaction between propene and the CO oxidation active site on this catalyst, and a separation of adsorption sites is proposed as the cause of this inhibition resistance. In conclusion, this catalyst shows great potential as a low-cost component for low temperature exhaust streams that are expected to be a characteristic of future automotive systems.},
doi = {10.1002/anie.201506093},
url = {https://www.osti.gov/biblio/1247937}, journal = {Angewandte Chemie (International Edition)},
issn = {1433-7851},
number = 45,
volume = 54,
place = {United States},
year = {Fri Sep 11 00:00:00 EDT 2015},
month = {Fri Sep 11 00:00:00 EDT 2015}
}

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Cited by: 75 works
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Works referenced in this record:

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