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Title: Selective catalytic reduction of NO by ammonia and NO oxidation Over CoOx/CeO2 catalysts

Abstract

The selective catalytic reduction of NOsub>x with NH3 (NH3-SCR) at low temperatures is still a major challenge in environmental catalysis research. Metal oxide based catalysts have attracted great attention due to their excellent low-temperature activity. In this study, CeO2-supported cobalt (Co)-oxide with variable Co/Ce weight ratios were prepared by the incipient-wetness impregnation method. The effect of Co loading as well as the effect of temperature on catalytic behaviors have been studied for the NO reduction and NO oxidation reactions. Thorough characterization by means of BET, XRD, and Raman has shown the topological model of the catalyst and interpretation of the observed reactivity trends. The activity test of CoOx/CeO2 catalysts showed that the addition of Co enhanced the activity of NO reduction as well as that of NO oxidation. The most active catalyst with 10 wt% Co loading showed 70% NO reduction and 85% NO oxidation activity. Catalyst characterization results indicated that Co was monodispersed on ceria surface with the low Co loading amount, while Co3O4 was formed on ceria with high Co loading amounts that affected the overall catalytic activity.

Authors:
 [1];  [2];  [3];  [3]; ORCiD logo [4]; ORCiD logo [2]
  1. Stony Brook Univ., NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
  2. Stony Brook Univ., NY (United States)
  3. Seoul National Univ. (Korea, Republic of)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1607707
Alternate Identifier(s):
OSTI ID: 1694334
Report Number(s):
BNL-213765-2020-JAAM
Journal ID: ISSN 2468-8231
Grant/Contract Number:  
SC0012704; 37298
Resource Type:
Accepted Manuscript
Journal Name:
Molecular Catalysis (Online)
Additional Journal Information:
Journal Name: Molecular Catalysis (Online); Journal Volume: 482; Journal Issue: C; Journal ID: ISSN 2468-8231
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; NH₃-SCR; NO oxidation; CoOx/CeO₂; incipient wetness impregnation

Citation Formats

Akter, Nusnin, Zhang, Shuhao, Lee, Jaeha, Kim, Do Heui, Boscoboinik, Jorge Anibal, and Kim, Taejin. Selective catalytic reduction of NO by ammonia and NO oxidation Over CoOx/CeO2 catalysts. United States: N. p., 2019. Web. doi:10.1016/j.mcat.2019.110664.
Akter, Nusnin, Zhang, Shuhao, Lee, Jaeha, Kim, Do Heui, Boscoboinik, Jorge Anibal, & Kim, Taejin. Selective catalytic reduction of NO by ammonia and NO oxidation Over CoOx/CeO2 catalysts. United States. https://doi.org/10.1016/j.mcat.2019.110664
Akter, Nusnin, Zhang, Shuhao, Lee, Jaeha, Kim, Do Heui, Boscoboinik, Jorge Anibal, and Kim, Taejin. Tue . "Selective catalytic reduction of NO by ammonia and NO oxidation Over CoOx/CeO2 catalysts". United States. https://doi.org/10.1016/j.mcat.2019.110664. https://www.osti.gov/servlets/purl/1607707.
@article{osti_1607707,
title = {Selective catalytic reduction of NO by ammonia and NO oxidation Over CoOx/CeO2 catalysts},
author = {Akter, Nusnin and Zhang, Shuhao and Lee, Jaeha and Kim, Do Heui and Boscoboinik, Jorge Anibal and Kim, Taejin},
abstractNote = {The selective catalytic reduction of NOsub>x with NH3 (NH3-SCR) at low temperatures is still a major challenge in environmental catalysis research. Metal oxide based catalysts have attracted great attention due to their excellent low-temperature activity. In this study, CeO2-supported cobalt (Co)-oxide with variable Co/Ce weight ratios were prepared by the incipient-wetness impregnation method. The effect of Co loading as well as the effect of temperature on catalytic behaviors have been studied for the NO reduction and NO oxidation reactions. Thorough characterization by means of BET, XRD, and Raman has shown the topological model of the catalyst and interpretation of the observed reactivity trends. The activity test of CoOx/CeO2 catalysts showed that the addition of Co enhanced the activity of NO reduction as well as that of NO oxidation. The most active catalyst with 10 wt% Co loading showed 70% NO reduction and 85% NO oxidation activity. Catalyst characterization results indicated that Co was monodispersed on ceria surface with the low Co loading amount, while Co3O4 was formed on ceria with high Co loading amounts that affected the overall catalytic activity.},
doi = {10.1016/j.mcat.2019.110664},
journal = {Molecular Catalysis (Online)},
number = C,
volume = 482,
place = {United States},
year = {2019},
month = {10}
}

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Cited by: 9 works
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Figures / Tables:

Figure 1 Figure 1: Surface area results of CoOx/CeO2 catalysts. Co loading: 0~30wt%.

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.