Spatiotemporal oscillations on a Rh/SiO2 washcoat catalyst supported on an Al disk are studied using infrared thermography to visualize the temperature patterns. The dynamics of the temperature pattern oscillations were analyzed with the empirical eigenfunction method. During self-sustained and forced oscillations, these patterns are characterized by a pulsating oscillation with one hot spot near the reactor inlet. Proper vibration of the O-2 and CO now rates when the reaction is near transitions between steady states or in an oscillatory regime decreases the ignition/extinction temperature, increases the time average temperature and CO conversion, and dramatically suppresses the self-sustained oscillations. In situ Fourier transform infrared spectroscopic results indicate that feed vibrations prevent the formation and propagation of high CO coverage on the catalyst surface.