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Morphology dependence of catalytic properties of Ni/CeO2 for CO2 methanation: A kinetic and mechanism study
Abstract
Abstract Ceria has been used for catalyst support for long time due to its unique structural properties resulting from oxygen vacancies and reversible valence change (Ce4+ and Ce3+). In this report, ceria nanorods (NR) and nanocubs (NC) were prepared with hydrothermal method and 5 wt% nickel was loaded on it. The effect of morphology of ceria supports for CO2 methanation reaction was studied. Characterization including TPR, TEM, XRD and XPS shows that Ni/CeO2-NR had a higher number of Ce3+ proportion compared with Ni/CeO2-NC. Both catalysts showed high conversion and selectivity for methane at low temperature range at200–250 °C and interestingly Ni/CeO2-NR exhibited a higher activity than Ni/CeO2–NC. A kinetic study and DRIFTs investigation were carried out to formulate the mechanism. It turned out that CO2 methanation on Ni/CeO2 goes through a formate route instead of CO2 dissociation and the oxygen vacant sites are supposed to be the active sites for the formate formation in this mechanism.
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Cites
Recent advances in catalytic hydrogenation of carbon dioxide
Wang, W., Wang, S., Ma, X., & Gong, J. (2011) · Chemical Society Reviews · doi:10.1039/c1cs15008a · Cited by 3,316
Direct Capture of CO2 from Ambient Air
Sanz-Pérez, E. S., Murdock, C. R., Didas, S. A., & Jones, C. W. (2016) · Chemical Reviews · doi:10.1021/acs.chemrev.6b00173 · Cited by 2,406
The hydrogen economy, fuel cells, and electric cars
Shinnar, R. (2003) · Technology in Society · doi:10.1016/j.techsoc.2003.09.024 · Cited by 173
Cited by
Essential Role of the Support for Nickel-Based CO2 Methanation Catalysts
Shen, L., Xu, J., Zhu, M., & Han, Y.-F. (2020) · ACS Catalysis · doi:10.1021/acscatal.0c03471 · Cited by 386
Metadata
- Authors
- Bian, Z., Chan, Y. M., Yu, Y., & Kawi, S.
- Venue
- Catalysis Today
- Publisher
- Elsevier BV
- Published
- 2020-05
- Volume
- 347
- Pages
- 31-38
- ISSN
- 0920-5861 (ISSN-L)
- OpenAlex
- W2801447283
- Cited by
- 217
- References
- 3
- FWCI
- 3.45
- Type
- journal article
- Language
- en
- Open access
- closed
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- Bian, Z., Chan, Y. M., Yu, Y., & Kawi, S. (2020). Morphology dependence of catalytic properties of Ni/CeO2 for CO2 methanation: A kinetic and mechanism study. Catalysis Today. https://doi.org/10.1016/j.cattod.2018.04.067
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