Ni/CeO2 Nanocatalysts with Optimized CeO2 Support Morphologies for CH4 Oxidation
Abstract
Catalytic oxidation of CH4 over nonprecious Ni/CeO2 catalysts has attracted wide attention. Controlling the morphology of a CeO2 support can enhance the CH4 oxidation activity without changing the catalyst composition. Here, in this paper, a series of 2 wt % Ni/CeO2 nanocatalysts with different CeO2 support morphologies (nanoparticles (P), rods (R), cubes (C)) and synthetic procedures (precipitation, sol-gel (SG)) were evaluated for their CH4 oxidation performance. The redox properties of CeO2 supports and corresponding Ni loaded catalysts were characterized by H2-temperature-programmed reduction and oxygen storage capacity (OSC) measurements. The relationship among the CeO2 morphologies, surface areas, redox properties, and CH4 oxidation activity for both CeO2 supports and Ni/CeO2 catalysts was established. The findings suggest that CeO2-R has a greater amount of surface oxygen vacancies as well as an improved OSC and CH4 oxidation activity compared to CeO2-P and CeO2-C supports. The same CH4 oxidation activity pattern was observed for the Ni containing catalysts (Ni/CeO2-R > Ni/CeO2-P > Ni/CeO2-C). Increasing the CeO2 surface area by using a sol-gel synthesis method (CeO2-SG) improved the amount of surface oxygen vacancies and CH4 oxidation performance of CeO2-SG and Ni/CeO2-SG compared to CeO2-R and Ni/CeO2-R, respectively. Finally, all studied Ni/CeO2 nanocatalysts showed improved hydrothermal stabilitymore »
- Authors:
-
[1];
[2];
[4];
[1]
- State Univ. of New York at Buffalo, NY (United States)
- Univ. of New Mexico, Albuquerque, NM (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Energy and Transportation Sciences Division
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Manufacturing Science Division
- 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), Office of Sustainable Transportation. Vehicle Technologies Office (VTO); USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1965269
- Grant/Contract Number:
- AC05-00OR22725; FOA-0002197; FG02-05ER15712
- Resource Type:
- Accepted Manuscript
- Journal Name:
- ACS Applied Nano Materials
- Additional Journal Information:
- Journal Volume: 6; Journal Issue: 6; Journal ID: ISSN 2574-0970
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Catalysts; Nanoparticles; Oxidation; Redox reactions; Stability; Ni/CeO2; Methane oxidation; Morphology control; Redox properties; Support effect
Citation Formats
Chen, Junjie, Pham, Hien N., Mon, Tala, Toops, Todd J., Datye, Abhaya K., Li, Zhenglong, and Kyriakidou, Eleni A. Ni/CeO2 Nanocatalysts with Optimized CeO2 Support Morphologies for CH4 Oxidation. United States: N. p., 2023.
Web. doi:10.1021/acsanm.2c05496.
Chen, Junjie, Pham, Hien N., Mon, Tala, Toops, Todd J., Datye, Abhaya K., Li, Zhenglong, & Kyriakidou, Eleni A. Ni/CeO2 Nanocatalysts with Optimized CeO2 Support Morphologies for CH4 Oxidation. United States. https://doi.org/10.1021/acsanm.2c05496
Chen, Junjie, Pham, Hien N., Mon, Tala, Toops, Todd J., Datye, Abhaya K., Li, Zhenglong, and Kyriakidou, Eleni A. Tue .
"Ni/CeO2 Nanocatalysts with Optimized CeO2 Support Morphologies for CH4 Oxidation". United States. https://doi.org/10.1021/acsanm.2c05496. https://www.osti.gov/servlets/purl/1965269.
@article{osti_1965269,
title = {Ni/CeO2 Nanocatalysts with Optimized CeO2 Support Morphologies for CH4 Oxidation},
author = {Chen, Junjie and Pham, Hien N. and Mon, Tala and Toops, Todd J. and Datye, Abhaya K. and Li, Zhenglong and Kyriakidou, Eleni A.},
abstractNote = {Catalytic oxidation of CH4 over nonprecious Ni/CeO2 catalysts has attracted wide attention. Controlling the morphology of a CeO2 support can enhance the CH4 oxidation activity without changing the catalyst composition. Here, in this paper, a series of 2 wt % Ni/CeO2 nanocatalysts with different CeO2 support morphologies (nanoparticles (P), rods (R), cubes (C)) and synthetic procedures (precipitation, sol-gel (SG)) were evaluated for their CH4 oxidation performance. The redox properties of CeO2 supports and corresponding Ni loaded catalysts were characterized by H2-temperature-programmed reduction and oxygen storage capacity (OSC) measurements. The relationship among the CeO2 morphologies, surface areas, redox properties, and CH4 oxidation activity for both CeO2 supports and Ni/CeO2 catalysts was established. The findings suggest that CeO2-R has a greater amount of surface oxygen vacancies as well as an improved OSC and CH4 oxidation activity compared to CeO2-P and CeO2-C supports. The same CH4 oxidation activity pattern was observed for the Ni containing catalysts (Ni/CeO2-R > Ni/CeO2-P > Ni/CeO2-C). Increasing the CeO2 surface area by using a sol-gel synthesis method (CeO2-SG) improved the amount of surface oxygen vacancies and CH4 oxidation performance of CeO2-SG and Ni/CeO2-SG compared to CeO2-R and Ni/CeO2-R, respectively. Finally, all studied Ni/CeO2 nanocatalysts showed improved hydrothermal stability compared to conventional Pd/Al2O3.},
doi = {10.1021/acsanm.2c05496},
journal = {ACS Applied Nano Materials},
number = 6,
volume = 6,
place = {United States},
year = {Tue Mar 07 00:00:00 EST 2023},
month = {Tue Mar 07 00:00:00 EST 2023}
}
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