Reaction Rate Oscillations during the Oxidation of Hydrogen on Nickel
Reaction Rate Oscillations during the Oxidation of Hydrogen on Nickel
复制标题
镍上氢氧化过程中的反应速率振荡
DOI：
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发表时间：
1980
期刊：
影响因子：
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通讯作者：
D. Luss
中科院分区：
文献类型：
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作者：
Ž. Kurtanjek;M. Sheintuch;D. Luss
接触电势差 (CPD) 和流出物氧浓度的测量用于监测连续流反应器中镍板上氢气氧化过程中表面状态和反应速率的振荡。 CPD 测量表明，系统在活性状态和活性较低的氧化状态之间振荡，其中还原表面主要被化学吸附的氧覆盖。传热和传质的限制会影响振荡的形状、振幅和周期。然而，当运输限制可以忽略不计时，振荡并不会消失。
Measurements of contact potential difference (CPD) and effluent oxygen concentration were used to monitor oscillations in the surface state and reaction rate during the oxidation of hydrogen over a nickel plate in a continuous flow reactor. CPD measurements indicate that the system oscillates between an active state in which the reduced surface is covered mainly by chemisorbed oxygen and a less active oxidized state. Heat and mass transfer limitations affect the shape, amplitude and period of the oscillations. However, the oscillations do not disappear when transport limitations become negligible.