In situ synchrotron X-ray diffraction study of formation mechanism of _(0.33)Re_(0.67) nanoalloy powder upon thermal decomposition of complex

摘要

This paper presents step-by-step and in situ thermal decomposition of the [Rh(NH_3)_5Cl](ReO_4)_2 complex compound in hydrogen atmosphere. Main decomposition stages of this compound and development of the Rh_(0.33)Re_(0 67) solid solution have been revealed. It has been demonstrated in the in situ experiments, that the first stage of reduction of the starting compound affords nanocrystalline metallic rhodium. Further, rhenium is reduced and its atoms are intercalated in the lattice of primary nuclei yielding the Rh_xRe_(1-x) solid solution with the hcp lattice.