Microbial synthesis of bimetallic Pd-Rh and Pd-Pt nanoparticle catalysts.

ABSTRACT: In this study the metal-reducing bacterium, Geobacter sulfurreducens, was used to efficiently recover palladium (Pd), platinum (Pt), and rhodium (Rh) from solution via enzymatic bioreduction to form monometallic or bimetallic bio-PGM nanoparticles. Herein, we report the novel biosynthesis of bimetallic PdRh alloy nanoparticles (bio-PdRh), along with bimetallic PdPt nanoparticles (bio-PdPt). In monometallic solutions, G. sulfurreducens biosynthesised Pd(0), Pt(0), and Rh(0) nanoparticles supported at the cell surface, consistent with bioreduction by outer membrane c-type cytochromes. However, in bimetallic solutions, the cells preferentially bioreduced Pt(iv) over Pd(ii), resulting in Pt-rich bio-PdPt nanoparticles and highly dispersed Pd(ii) cell-surface clusters. In c

SUBMITTER: Xie J 

PROVIDER: S-EPMC12713794 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature