Abstract
Abstract Angular dependence of rotational and vibrational temperatures of product CO2 were studied in CO oxidation on a Pd polycrystalline surface by means of chemiluminescence measurements. Rotational temperature (Trot) and vibrational temperature (Tvib) showed minimum values at the surface normal and significantly increased as the desorption angle increased. Trot and Tvib became higher when the ratio of exposure of O2 to that of CO increased. These angular dependences are quite different from those on Pd(111).
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