Dynamic Catalyst Restructuring and Interface Instabilities: A Combined Experimental and Computational Study

在Rh（110）表面NH3+ O2和CH3OH + O2反应的双稳定状态下，最近观察到一种新型的界面不稳定性。在两相平衡反应条件下，富氧/贫氧界面不是固定的，而是表现出沿前沿脉冲状传播的局域激发。在当前的项目中，我们试图用实验/理论相结合的方法来确定移动界面不稳定性的机制。基于不稳定性是由于反应引起的表面粗糙化和反应的局部激发之间的耦合的思想，我们试图建立一个真实的数学模型来再现所观察到的现象。在汉诺威，我们将进行原位显微镜观察，以确定拟议机制的基本步骤。在汉诺威和莫斯科的小组之间的密切合作下，将开发一个现实的反应-扩散模型。模拟和模拟结果的分析将由莫斯科小组进行。如果成功，模拟将为我们提供催化反应诱导粗化的潜在机制。

In the bistable regime of the NH3+ O2 and the CH3OH + O2 reactions on a Rh(110) surface a novel type of interface instability has been observed recently. Under reaction conditions of equistability of the two phases the interface oxygen rich/oxygen poor is not stationary but exhibits localized excitations which travel pulse-like along the front line. In the current project we try to determine the mechanism of the traveling interface instabilities in a combined experimental/theoretical approach. Based on the idea that the instability is due to a coupling between reaction-induced surface roughening and local excitations of the reaction we try to set up a realistic mathematical model that reproduces the observed phenomena. In Hannover we will conduct in situ microscopy in order to identify the essential steps of the proposed mechanism. In close collaboration between the groups at Hannover and Moscow a realistic reaction-diffusion model shall be developed. The simulation and the analysis of the simulation results will be conducted by the Moscow group. If successful, the simulation would provide us with a potential mechanism for reaction-induced roughening in catalysis.