Journal
CATALYSIS TODAY
Volume 360, Issue -, Pages 46-54Publisher
ELSEVIER
DOI: 10.1016/j.cattod.2019.06.018
Keywords
Bimetallic Pt-Ni; Ceria; Dry reforming of methane; Stability; CO-DRIFTS; Anti-coke properties
Funding
- CONACyT [308329]
- CONACyT
- [CONACyT-176509]
Ask authors/readers for more resources
The addition of Pt improved the catalytic activity and stability of nickel-ceria catalysts, while bimetallic Pt-Ni/CeO2 catalysts showed stable performance and higher H-2/CO ratio compared to monometallic samples.
A series of Pt-Ni/CeO2 catalysts with different Pt:Ni atomic ratios were synthetized through incipient wetness impregnation over CeO2 prepared by precipitation. Catalysts were characterized by XRD, EDS-SEM, N-2-Adsorption, TEM-STEM, H-2-TPR, CO-DRIFTS and O-2-TPO. Samples were studied in the Dry Reforming of Methane (DRM) reaction. The catalytic activity of nickel-ceria catalysts was improved by addition of platinum at any composition, and the behavior of bimetallic Pt-Ni/CeO2 catalysts resembled to that exhibited by the platinum-ceria sample. Stability results showed that bimetallic catalysts presented a steady behavior, with no deactivation after 24 h on-stream and enhanced anti-coke properties by the presence of platinum, while the H-2/CO ratio at all metal compositions was superior compared to that of monometallic samples. Nickel not only contributes to the methane activation, but also to the hydrogen production. The enhancement of the catalytic properties of Pt-Ni/CeO2 catalysts was explained through a synergic effect between the two metals which impacted in the metal dispersion, the reduction properties and the stabilization of the surface structure of the active ensembles.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available