Recovery of platinum group metals from spent automotive converters and their conversion into efficient recyclable nanocatalysts.

ABSTRACT: The study reported in this article has shown for the first time that strongly acidic solutions (pH < 0.5) obtained after hydrometallurgical treatment of spent automotive converters (SAC) may be valuable secondary sources of platinum group metal (PGM) nanoparticles (NPs). The PGM precipitation strongly depended on the solution pH; the yield of the precipitated PGM NPs increased considerably from 40% to almost 100% when the pH was adjusted to 7-8. To improve the NPs stability, commercial TiO₂ was used as support to obtain efficient recyclable PGM@TiO₂ catalysts. The size of the PGM NPs was smaller than 5 nm, while the diameter of the supported particles varied from 10 to 50 nm. The size and dispersion of PGM NPs on the support strongly depended on the pH of the medium:

SUBMITTER: Wiecka Z 

PROVIDER: S-EPMC10439850 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature