The Origin of the Catalytic Activity of a Metal Hydride in CO2 Reduction.
Angew Chem Int Ed Engl
; 55(20): 6028-32, 2016 05 10.
Article
en En
| MEDLINE
| ID: mdl-27061237
ABSTRACT
Atomic hydrogen on the surface of a metal with high hydrogen solubility is of particular interest for the hydrogenation of carbon dioxide. In a mixture of hydrogen and carbon dioxide, methane was markedly formed on the metal hydride ZrCoHx in the course of the hydrogen desorption and not on the pristine intermetallic. The surface analysis was performed by means of time-of-flight secondary ion mass spectroscopy and near-ambient pressure X-ray photoelectron spectroscopy, for the in situ analysis. The aim was to elucidate the origin of the catalytic activity of the metal hydride. Since at the initial stage the dissociation of impinging hydrogen molecules is hindered by a high activation barrier of the oxidised surface, the atomic hydrogen flux from the metal hydride is crucial for the reduction of carbon dioxide and surface oxides at interfacial sites.
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MEDLINE
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En
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Angew Chem Int Ed Engl
Año:
2016
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Article
País de afiliación:
Suiza