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Dry Reforming of Methane on a Highly‐Active Ni‐CeO 2 Catalyst: Effects of Metal‐Support Interactions on C−H Bond Breaking
Author(s) -
Liu Zongyuan,
Grinter David C.,
Lustemberg Pablo G.,
NguyenPhan ThuyDuong,
Zhou Yinghui,
Luo Si,
Waluyo Iradwikanari,
Crumlin Ethan J.,
Stacchiola Dario J.,
Zhou Jing,
Carrasco Javier,
Busnengo H. Fabio,
GandugliaPirovano M. Verónica,
Senanayake Sanjaya D.,
Rodriguez José A.
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201602489
Subject(s) - methane , catalysis , carbon dioxide reforming , dissociation (chemistry) , x ray photoelectron spectroscopy , nickel , methane reformer , metal , adsorption , inorganic chemistry , materials science , syngas , chemistry , chemical engineering , steam reforming , metallurgy , organic chemistry , hydrogen production , engineering
Ni‐CeO 2 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/CeO 2 at temperatures as low as 300 K, generating CH x and CO x 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/CeO 2− x (111). At 700 K, under methane dry reforming conditions, no signals for adsorbed CH x or C species are detected in the C 1s XPS region. The reforming of methane proceeds in a clean and efficient way.