Equilibrium Surface Composition of Sulfuric Acid Films in Contact with Various Atmospheric Gases (HNO<sub>3</sub>, CO<sub>2</sub>, CH<sub>2</sub>O, Cl<sub>2</sub>, NO, NO<sub>2</sub>) — D. Howard Fairbrother (2000) | RDL Network
Equilibrium Surface Composition of Sulfuric Acid Films in Contact with Various Atmospheric Gases (HNO<sub>3</sub>, CO<sub>2</sub>, CH<sub>2</sub>O, Cl<sub>2</sub>, NO, NO<sub>2</sub>)
Differentially pumped X-ray photoelectron spectroscopy has been used to study the surface composition of sulfuric acid (H2SO4) and sulfuric acid/water mixtures in equilibrium with various atmospheric species. Nitric acid uptake in sulfuric acid solutions was observed below ≈ 220K. Compared to the theoretically predicted bulk composition, a significant enrichment of nitrogen was observed at the interface. The uptake of background water in sulfuric acid below 200 K was responsible for the reversible uptake of CO2, moderated through the formation of carbonic acid (H2CO3). For CH2O, Cl2, NO, and NO2, no observable surface species were observed over the temperature range studied (≈180−298 K).
Isobel J. Simpson, S. K. Akagi, Barbara Barletta, N. J. Blake, Yonghoon Choi, Glenn S. Diskin, Alan Fried, Henry E. Fuelberg, Simone Meinardi, F. S. Rowland, S. A. Vay, A. J. Weinheimer, P. O. Wennberg, P. Wiebring, Armin Wisthaler, Melissa Yang, R. J. Yokelson, Donald R Blake
Isobel J. Simpson, S. K. Akagi, Barbara Barletta, N. J. Blake, Yonghoon Choi, Glenn S. Diskin, Alan Fried, Henry E. Fuelberg, Simone Meinardi, F. S. Rowland, S. A. Vay, A. J. Weinheimer, P. O. Wennberg, P. Wiebring, Armin Wisthaler, Melissa Yang, R. J. Yokelson, Donald R Blake
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