Sorption of ammonia gas on the solid ion conductor Cu(i)Br

Abstract

The adsorption of ammonia gas on CuBr was investigated by manometric and microcalorimetric measurements. The adsorption isotherm initially indicates the existence of species of composition CuBr·NH3. A second region in the isotherm corresponds to the physisorption of NH3 molecules on CuBr-NH3. The enthalpies of adsorption decrease with increasing surface coverage from around 58 kJ mol−1 in the first region to about 50 kJ mol−1 for the second.