Interaction of formic and acetic acid with ice surfaces between 187 and 227 K. Investigation of single species- and competitive adsorption

文献情報

出版日 2008-03-10

DOI 10.1039/B800831K

インパクトファクター 3.676

著者

P. von Hessberg, N. Pouvesle, A. K. Winkler, G. Schuster, J. N. Crowley

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要旨

The physical adsorption of formic (HC(O)OH) and acetic (CH3C(O)OH) acid on ice was measured as a function of concentration and temperature. At low concentrations, the gas–ice interaction could be analysed by applying Langmuir adsorption isotherms to determine temperature dependent partition constants, KLang. Using temperature independent saturation coverages (Nmax) of (2.2 ± 0.5) × 1014 molecule cm−2 and (2.4 ± 0.6) × 1014 molecule cm−2 for HC(O)OH and CH3C(O)OH, respectively, we derive KLang(HC(O)OH) = 1.54 × 10−24 exp (6150/T) and KLang(CH3C(O)OH) = 6.55 × 10−25 exp (6610/T) cm3 molecule−1. Via a van’t Hoff analysis, adsorption enthalpies were obtained for HC(O)OH and CH3C(O)OH. Experiments in which both acids or HC(O)OH and methanol interacted with the ice surface simultaneously were adequately described by competitive adsorption kinetics. The results are compared to previous measurements and used to calculate the equilibrium partitioning of these trace gases to ice surfaces under conditions relevant to the atmosphere.

掲載誌

Physical Chemistry Chemical Physics

CiteScore: 5.5

自己引用率: 10.3%

年間論文数: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

Interaction of formic and acetic acid with ice surfaces between 187 and 227 K. Investigation of single species- and competitive adsorption

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Physical Chemistry Chemical Physics

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