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Leakage of O2 Precursor Molecules from Inert Hydrogen Islands on a Pt(111) Surface

Kristian Gustafsson (Institutionen för teknisk fysik, Fasta tillståndets fysik) ; Stig Andersson
Physical Review Letters Vol. 97 (2006), 7, p. article nr. 076101.
[Artikel, refereegranskad vetenskaplig]

We have observed, using infrared spectroscopy, that the precursor-mediated O2 chemisorption on the clean and the partially hydrogen-covered Pt(111) surfaces exhibits opposite temperature dependencies above the temperature for stable O2 physisorption. While the chemisorption probability on the clean surface increases with increasing temperature due to thermal activation of the precursor, it decreases on the partially hydrogen-covered surface which we suggest is due to a general loss of the mobile precursor molecules by thermal desorption from chemically inert hydrogen islands.



Denna post skapades 2007-01-11. Senast ändrad 2014-01-20.
CPL Pubid: 25242

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Fasta tillståndets fysik (2005-2015)
Institutionen för fysik (GU) (GU)

Ämnesområden

Teknisk fysik

Chalmers infrastruktur