Surface Sensitive Studies of the Reactive Uptake of Chlorine Nitrate on Ice
Surface Sensitive Studies of the Reactive Uptake of Chlorine Nitrate on Ice
复制标题
冰上硝酸氯反应吸收的表面敏感性研究
DOI：
10.1021/jp971121x
复制
发表时间：
1997
影响因子：
2.9
通讯作者：
S. George
中科院分区：
文献类型：
--
作者：
B. Berland;M. Tolbert;S. George
利用激光诱导热脱附（LITD）技术研究了硝酸氯（ClONO 2）在冰表面的反应吸附（ClONO 2 + H2O → HOCl + HNO 3）。将气相沉积的冰的薄膜在75至140 K的衬底温度下暴露于ClONO 2蒸气。ClONO 2的反应性吸收是通过监测冰表面上的水解反应产物HOCl和HNO 3来直接测量的，这是真实的。在75至110 K的低温下，HOCl覆盖率最初随着ClONO 2暴露而迅速增加，表明有效的水解反应。经过较长时间的ClONO 2暴露，HOCl生产率下降，HOCl达到恒定的覆盖范围。在75 ~ 110 K范围内，冰对ClONO_2的反应概率γ = 0.03，与温度无关。当温度高于110 K时，反应几率随温度的升高而降低，在140 K时达到γ = 0.005。这种反应的降低…
The reactive uptake of chlorine nitrate (ClONO2) on ice surfaces (ClONO2 + H2O → HOCl + HNO3) was studied with surface sensitivity using laser-induced thermal desorption (LITD) techniques. Thin films of vapor-deposited ice were exposed to ClONO2 vapor at substrate temperatures from 75 to 140 K. The reactive uptake of ClONO2 was directly measured by monitoring the hydrolysis reaction products, HOCl and HNO3, on the ice surface in real time. At low temperatures from 75 to 110 K, the HOCl coverage initially increased rapidly with ClONO2 exposure, indicating an efficient hydrolysis reaction. After longer ClONO2 exposures, the rate of HOCl production decreased and the HOCl reached a constant coverage. A reaction probability of γ = 0.03 was calculated for the reactive uptake of ClONO2 on ice and was independent of temperature from 75 to 110 K. At temperatures greater than 110 K, the reaction probability decreased with increasing temperature and reached a value of γ = 0.005 at 140 K. This decrease in the reactio...