Studies on the Formation of Catalytically Active PGM Nanoparticles from Model Solutions as a Basis for the Recycling of Spent Catalysts

Martyna Rzelewska-Piekut; Zuzanna Wiecka; Magdalena Regel-Rosocka

doi:10.3390/molecules27020390

Studies on the Formation of Catalytically Active PGM Nanoparticles from Model Solutions as a Basis for the Recycling of Spent Catalysts

Molecules. 2022 Jan 8;27(2):390. doi: 10.3390/molecules27020390.

Authors

Martyna Rzelewska-Piekut¹, Zuzanna Wiecka¹, Magdalena Regel-Rosocka¹

Affiliation

¹ Institute of Chemical Technology and Engineering, Poznan University of Technology, ul. Berdychowo 4, 60-965 Poznań, Poland.

Abstract

The paper presents basic studies on the precipitation of platinum, palladium, rhodium, and ruthenium nanoparticles from model acidic solutions using sodium borohydride, ascorbic acid, and sodium formate as reducing agents and polyvinylpyrrolidone as a stabilizing agent. The size of the obtained PGM particles after precipitation with NaBH₄ solution does not exceed 55 nm. NaBH₄ is an efficient reducer; the precipitation yields for Pt, Pd, Ru, Rh are 75, 90, 65 and 85%, respectively. By precipitation with ascorbic acid, it is possible to efficiently separate Pt, Rh, and Ru from Pd from the two-component mixtures. The obtained Pt, Pd, and Rh precipitates have the catalytic ability of the catalytic reaction of p-nitrophenol to p-aminophenol. The morphological characteristic of the PGM precipitates was analyzed by AFM, SEM-EDS, and TEM.

Keywords: PGM nanoparticles; palladium(II); platinum group metals (PGM); platinum(IV); rhodium(III); ruthenium(III).

Abstract

Grants and funding