Coexistence of Physisorbed and Solvated HCI at Warm Ice Surfaces

Kong, Xiangrui (author): Gothenburg University,Göteborgs universitet,Institutionen för kemi och molekylärbiologi,Department of Chemistry and Molecular Biology

Waldner, A. (author)

Orlando, F. (author)

Artiglia, L. (author)

Huthwelker, T. (author)

Ammann, M. (author)

Bartels-Rausch, T. (author)

(creator_code:org_t)

2017
2017
English.
In: Journal of Physical Chemistry Letters. - 1948-7185. ; 8:19, s. 4757-4762

Abstract Subject headings

The interfacial ionization of strong acids is an essential factor of multiphase and heterogeneous chemistry in environmental science, cryospheric science, catalysis research and material science. Using near ambient pressure core level X-ray photoelectron spectroscopy, we directly detected a low surface coverage of adsorbed HCl at 253 K in both molecular and dissociated states. Depth profiles derived from XPS data indicate the results as physisorbed molecular HCl at the outermost ice surface and dissociation occurring upon solvation deeper in the interfacial region. Complementary X-ray absorption measurements confirm that the presence of ions induces significant changes to the hydrogen bonding network in the interfacial region. This study gives clear evidence for nonuniformity across the air ice interface and questions the use of acid base concepts in interfacial processes.

MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Andra medicinska och farmaceutiska grundvetenskaper (hsv//swe)
MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Other Basic Medicine (hsv//eng)

By the author/editor: Kong, Xiangrui; Waldner, A.; Orlando, F.; Artiglia, L.; Huthwelker, T.; Ammann, M.; show more...; Bartels-Rausch, ...; show less...

About the subject

MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Basic Medicine; and Other Basic Medi ...

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