The spatial and velocity distributions of desorbing products (N₂, N₂O and CO₂) were studied at various crystal azimuths in steady-state NO +CO and N₂O+CO reactions on Pd(110) and Rh(110) by cross-correlation time-of-flight techniques. The product N₂ desorption on both surfaces collimates far from the surface normal toward the [001] direction below 600 K. The N₂ distribution on Pd(110) was presented in a three-dimensional way. [DOI: 10.1380/ejssnt.2006.593]