Structure and dynamics of a monolayer OCS on NaCl(001): a combined FTIRS, HAS and LEED study

Dohrmann, J. K.; Glebov, Alexei L.; Toennies, J. P.; Weiß, Helmut

doi:10.1016/s0039-6028(96)01038-2

Cited by 14 publications

(4 citation statements)

References 20 publications

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“…The same experiments were also carried out using the preoxidized atmospheric particle sample and the preoxidized Al 2 O 3 sample. The results are shown in Figure B and C. In Figure A, B, and C strong peaks due to gas-phase OCS appeared at 2071 and 2052 cm -1 ( , ). A pair of peaks of gaseous carbon dioxide (CO 2 ) were observed at 2337 and 2361 cm -1 ( − ).…”

Section: Resultsmentioning

confidence: 92%

Heterogeneous Oxidation of Carbonyl Sulfide on Atmospheric Particles and Alumina

Liu

et al. 2005

Environ. Sci. Technol.

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Heterogeneous oxidation of carbonyl sulfide (OCS) on atmospheric particles and alumina (Al 2 O 3 ) was investigated in a closed system and a flowed system using in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). At room temperature, OCS could be catalytically oxidized on the surface of atmospheric particles and Al 2 O 3 to form gas-phase CO 2 and surface sulfate (SO 4 2-), sulfite (HSO 3 -), and hydrogen carbonate (HCO 3 -) species. The real atmospheric particles were characterized using X-ray fluorescence (XRF) and the Brunauer-Emmett-Teller (BET) method. As a simplified model, Al 2 O 3 was used to study the reaction mechanism of heterogeneous oxidation of OCS. The hydrogen thiocarbonate surface (HSCO 2 -) species, an intermediate formed in the reaction of OCS with surface hydroxyl (OH), could only be observed on the prereduced Al 2 O 3 sample. The experimental results also indicate that surface oxygen containing species on the atmospheric particle sample and the Al 2 O 3 sample might be the key reactant for OCS oxidation. A reaction mechanism of heterogeneous oxidation of OCS on Al 2 O 3 surface is discussed.

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Section: Resultsmentioning

confidence: 92%

Heterogeneous Oxidation of Carbonyl Sulfide on Atmospheric Particles and Alumina

Liu

et al. 2005

Environ. Sci. Technol.

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“…The adsorption band between 2100 and 2000 cm -1 with features at 2071 and 2051 cm -1 , corresponding to gaseous COS (17), decreased drastically in intensity as the reaction proceeded. The bands at 2360 and 2341 cm -1 attributed to gaseous CO2 (18) continuously grew in intensity as the gaseous COS decreased.…”

Section: Drifts Study Of the Heterogeneous Reaction Of Cos Onmentioning

confidence: 99%

Heterogeneous Uptake of Carbonyl Sulfide on Hematite and Hematite−NaCl Mixtures

Chen

Kong

Chen

et al. 2007

Environ. Sci. Technol.

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Heterogeneous uptake of carbonyl sulfide (COS) on hematite, NaCl, and a series of hematite-NaCl mixtures was investigated in a static reaction chamber at 298 K using in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). The adsorbed COS was oxidized on the surface of hematite and hematite-NaClmixtures, forming surface hydrogen thiocarbonate (HSCO2-), carbonate (CO3(2-)), and sulfate (SO4(2-)) species as well as gaseous CO2. The reactivity of hematite-NaCI mixtures was lower than that of hematite alone. No uptake of COS was observed on the pure NaCl sample. For mixtures, the 40% hematite + 60% NaCl sample exhibited the highest reactivity. Preadsorption experiments using CO2 as a probe molecule indicated that about 70% of adsorbed COS was oxidized by surface oxygen ions on hematite. In contrast, the Fe-CIO species formed during the sample preparation procedure is proposed to be the active site on the hematite-NaCI mixtures. A plausible reaction mechanism of the heterogeneous oxidation of COS is proposed, and atmospheric implications based on these results are discussed.

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“…借助扫描电镜表征, 所制得混合颗粒的平均尺寸大约为 80 nm 左右. 所配置的样品根据不同需要在有饱和食盐水存在的容器中(相对湿度 (RH)约 68%)饱和不同时间, 含 NaNO3和 KNO3样品 - 14,24 γ＝-kf /(Z×As)…”

Section: 实验部分unclassified

Effects of Nitrates on the Heterogeneous Reaction of Carbonyl Sulfide on Model Aerosols

Yang¹,

Shuan-Qin²,

Ling-Dong³

et al. 2011

Acta Physico-Chimica Sinica

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The heterogeneous reaction of carbonyl sulfide (COS) on hematite particles in the presence of nitrate was investigated by in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). For sodium nitrate-containing samples, the hematite sample containing NaNO3 with mass fraction of 4% gave the highest reaction rate, which was about 5 times higher than that of hematite. For the particles containing nitrate at the same mass fraction (24%) the reactivity in descending order was α-Fe2O3/KNO3, α-Fe2O3/NaNO3, α-Fe2O3/NH4NO3 and α-Fe2O3. No uptake of COS was observed for the pure NaNO3, KNO3 and NH4NO3 samples. These results indicate that the added nitrate increased the COS conversion ability of α-Fe2O3 particles.

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Structure and dynamics of a monolayer OCS on NaCl(001): a combined FTIRS, HAS and LEED study

Cited by 14 publications

References 20 publications

Heterogeneous Oxidation of Carbonyl Sulfide on Atmospheric Particles and Alumina

Heterogeneous Oxidation of Carbonyl Sulfide on Atmospheric Particles and Alumina

Heterogeneous Uptake of Carbonyl Sulfide on Hematite and Hematite−NaCl Mixtures

Effects of Nitrates on the Heterogeneous Reaction of Carbonyl Sulfide on Model Aerosols

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