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Title: Copper-Cobalt-Cerium Ternary Oxide as an Additive to a Conventional Platinum-Group-Metal Catalyst for Automotive Exhaust Catalysis

Recently, we reported on a ternary mixed-oxide catalyst that showed low-temperature CO oxidation activity under lean exhaust conditions without inhibition by hydrocarbons such as propene. However, the hydrocarbon oxidation activity of this Cu–Co–Ce (CCC) catalyst cannot be considered as a stand-alone solution to low-temperature automotive exhaust catalysis. To achieve both low-temperature oxidation of pollutants and a reduction in the total platinum-group-metal (PGM) content, we examined a 50 % physical mixture of traditional Pt/Al 2O 3 and our CCC catalyst in two simulated exhaust protocols. Using this physical mixture, we were able to obtain equivalent or better hydrocarbon activity than the baseline Pt/Al 2O 3 catalyst with half the total PGM content as well as increased sulfur tolerance for the CCC component of the mixture. Diffuse reflectance infrared Fourier transform spectroscopy data confirmed that despite exposure of sulfur-sensitive CCC to SO 2, Cu +-carbonyl binding sites could still be seen if the catalyst was mixed with Pt/Al 2O 3.
Authors:
ORCiD logo [1] ;  [1] ;  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Grant/Contract Number:
AC05-00OR22725; AC0500OR22725
Type:
Accepted Manuscript
Journal Name:
ChemCatChem
Additional Journal Information:
Journal Volume: 10; Journal Issue: 6; Journal ID: ISSN 1867-3880
Publisher:
ChemPubSoc Europe
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
OSTI Identifier:
1476435
Alternate Identifier(s):
OSTI ID: 1420003

Binder, Andrew J., Toops, Todd J., and Parks, James E.. Copper-Cobalt-Cerium Ternary Oxide as an Additive to a Conventional Platinum-Group-Metal Catalyst for Automotive Exhaust Catalysis. United States: N. p., Web. doi:10.1002/cctc.201701706.
Binder, Andrew J., Toops, Todd J., & Parks, James E.. Copper-Cobalt-Cerium Ternary Oxide as an Additive to a Conventional Platinum-Group-Metal Catalyst for Automotive Exhaust Catalysis. United States. doi:10.1002/cctc.201701706.
Binder, Andrew J., Toops, Todd J., and Parks, James E.. 2018. "Copper-Cobalt-Cerium Ternary Oxide as an Additive to a Conventional Platinum-Group-Metal Catalyst for Automotive Exhaust Catalysis". United States. doi:10.1002/cctc.201701706.
@article{osti_1476435,
title = {Copper-Cobalt-Cerium Ternary Oxide as an Additive to a Conventional Platinum-Group-Metal Catalyst for Automotive Exhaust Catalysis},
author = {Binder, Andrew J. and Toops, Todd J. and Parks, James E.},
abstractNote = {Recently, we reported on a ternary mixed-oxide catalyst that showed low-temperature CO oxidation activity under lean exhaust conditions without inhibition by hydrocarbons such as propene. However, the hydrocarbon oxidation activity of this Cu–Co–Ce (CCC) catalyst cannot be considered as a stand-alone solution to low-temperature automotive exhaust catalysis. To achieve both low-temperature oxidation of pollutants and a reduction in the total platinum-group-metal (PGM) content, we examined a 50 % physical mixture of traditional Pt/Al2O3 and our CCC catalyst in two simulated exhaust protocols. Using this physical mixture, we were able to obtain equivalent or better hydrocarbon activity than the baseline Pt/Al2O3 catalyst with half the total PGM content as well as increased sulfur tolerance for the CCC component of the mixture. Diffuse reflectance infrared Fourier transform spectroscopy data confirmed that despite exposure of sulfur-sensitive CCC to SO2, Cu+-carbonyl binding sites could still be seen if the catalyst was mixed with Pt/Al2O3.},
doi = {10.1002/cctc.201701706},
journal = {ChemCatChem},
number = 6,
volume = 10,
place = {United States},
year = {2018},
month = {1}
}