The paper looks into the temporal and spatial dynamics of a new oscillating system comprised of CO oxidation over Co. Reaction rate oscillations occurring in CO excess were similar to the ones observed over Ni. The periodic variation of oxygen imbalance together with the variation in colour changes during the oscillations indicated that the oscillations were closely connected with the reversible oxidation of Co to various Co oxides. The periodic oxidation/reduction of cobalt proceeded as surface waves. Unexpectedly, widely varying spatial structures and wavefront velocities were detected during the heating and cooling branches under identical reaction conditions: regular self-oscillations transforming into a “surface turbulence” state.

本文研究了一个新的振荡系统的时空动力学，该振荡系统由在Co上的CO氧化组成。CO过量时发生的反应速率振荡与在Ni上观察到的相似。氧不平衡的周期性变化以及振荡过程中颜色变化的变化表明，振荡与Co可逆氧化成各种Co氧化物紧密相关。钴的周期性氧化/还原以表面波的形式进行。出乎意料的是，在相同的反应条件下，在加热和冷却分支过程中检测到空间结构和波阵面速度变化很大：规则的自激振荡转换为“表面湍流”状态。