Dry Reforming of Methane on a Highly-Active Ni-CeO2 Catalyst: Effects of Metal-Support Interactions on C−H Bond Breaking

Ni‐CeO2 is a highly efficient, stable and non‐expensive catalyst for methane dry reforming at relative low temperatures (700 K). The active phase of the catalyst consists of small nanoparticles of nickel dispersed on partially reduced ceria. Experiments of ambient pressure XPS indicate that methane...

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Bibliographic Details
Published in:Angewandte Chemie (International ed.) 2016-06, Vol.55 (26), p.7455-7459
Main Authors: Liu, Zongyuan, Grinter, David C., Lustemberg, Pablo G., Nguyen-Phan, Thuy-Duong, Zhou, Yinghui, Luo, Si, Waluyo, Iradwikanari, Crumlin, Ethan J., Stacchiola, Dario J., Zhou, Jing, Carrasco, Javier, Busnengo, H. Fabio, Ganduglia-Pirovano, M. Verónica, Senanayake, Sanjaya D., Rodriguez, José A.
Format: Article
Language:English
Subjects:
Activation
Breaking
Catalysts
ceria
Cerium oxides
Density
density functional theory
Dispersion
Drying
Functional anatomy
INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Mathematical analysis
Metals
Methane
methane dissociation
Nanoparticles
Nickel
Pressure
Reforming
X-ray photoelectron spectroscopy
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Summary:Ni‐CeO2 is a highly efficient, stable and non‐expensive catalyst for methane dry reforming at relative low temperatures (700 K). The active phase of the catalyst consists of small nanoparticles of nickel dispersed on partially reduced ceria. Experiments of ambient pressure XPS indicate that methane dissociates on Ni/CeO2 at temperatures as low as 300 K, generating CHx and COx species on the surface of the catalyst. Strong metal–support interactions activate Ni for the dissociation of methane. The results of density‐functional calculations show a drop in the effective barrier for methane activation from 0.9 eV on Ni(111) to only 0.15 eV on Ni/CeO2−x(111). At 700 K, under methane dry reforming conditions, no signals for adsorbed CHx or C species are detected in the C 1s XPS region. The reforming of methane proceeds in a clean and efficient way. NiCe and dry: Ni‐CeO2 is shown to be highly efficient, stable, and non‐expensive catalyst for methane dry reforming at relative low temperatures (700 K). The active phase of the catalyst consists of small nanoparticles of nickel dispersed on partially reduced ceria. Strong metal–support interactions activate Ni for the dissociation of methane.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201602489