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Dissociative Adsorption of Hydrogen on PdO(101) Studied by HRCLS and DFT

N. M. Martin ; Maxime van den Bossche (Institutionen för teknisk fysik, Kemisk fysik ; Kompetenscentrum katalys (KCK)) ; Henrik Grönbeck (Institutionen för teknisk fysik, Kemisk fysik ; Kompetenscentrum katalys (KCK)) ; C. Hakanoglu ; J. Gustafson ; S. Blomberg ; M. A. Arman ; A. Antony ; R. Rai ; A. Asthagiri ; J. F. Weaver ; E. Lundgren
Journal of Physical Chemistry C (1932-7447). Vol. 117 (2013), 26, p. 13510-13519.
[Artikel, refereegranskad vetenskaplig]

High-resolution core-level spectroscopy (HRCLS) and density functional theory (DFT) calculations have been used to investigate the adsorption and dissociation of hydrogen on a PdO(101) film grown on Pd(111). Energy-dependent measurements of the O 1s and Pd 3d(5/2) binding energies enable identification of surface components that correspond to undercoordinated Pd and O atoms. HRCLS data obtained at 110 K, after hydrogen exposure at the same temperature, reveal hydrogen adsorption and formation of Pd-H and O-H groups. Adsorption at room temperature results instead in complete reduction of the oxide. The experimental results are supported by the DFT calculations of core-level shifts and barriers for water formation.



Denna post skapades 2013-08-09. Senast ändrad 2016-11-21.
CPL Pubid: 180961

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Kemisk fysik (1900-2015)
Kompetenscentrum katalys (KCK)

Ämnesområden

Fysikalisk kemi

Chalmers infrastruktur

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