Biosynthesis Parameters Control the Physicochemical and Catalytic Properties of Microbially Supported Pd Nanoparticles.

Autor: Morriss CE; Department of Earth and Environmental Sciences, University of Manchester, Oxford Road, Manchester, M13 9PL, UK.; Department of Materials, University of Manchester, Oxford Road, Manchester, M13 9PL, UK., Cheung CK; Department of Materials, University of Manchester, Oxford Road, Manchester, M13 9PL, UK., Nunn E; Department of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, UK., Parmeggiani F; Dipartimento di Chimica, Materiali ed Ingegneria Chimica 'Giulio Natta', Politecnico di Milano, Piazza Leonardo da Vinci, Milan, 20133, Italy., Powell NA; Johnson Matthey Technology Centre, Reading, RG4 9NH, UK., Kimber RL; Department of Earth and Environmental Sciences, University of Manchester, Oxford Road, Manchester, M13 9PL, UK., Haigh SJ; Department of Materials, University of Manchester, Oxford Road, Manchester, M13 9PL, UK., Lloyd JR; Department of Earth and Environmental Sciences, University of Manchester, Oxford Road, Manchester, M13 9PL, UK.
Jazyk: angličtina
Zdroj: Small (Weinheim an der Bergstrasse, Germany) [Small] 2024 Aug; Vol. 20 (31), pp. e2311016. Date of Electronic Publication: 2024 Mar 10.
DOI: 10.1002/smll.202311016
Abstrakt: The biosynthesis of Pd nanoparticles supported on microorganisms (bio-Pd) is achieved via the enzymatic reduction of Pd(II) to Pd(0) under ambient conditions using inexpensive buffers and electron donors, like organic acids or hydrogen. Sustainable bio-Pd catalysts are effective for C-C coupling and hydrogenation reactions, but their industrial application is limited by challenges in controlling nanoparticle properties. Here, using the metal-reducing bacterium Geobacter sulfurreducens, it is demonstrated that synthesizing bio-Pd under different Pd loadings and utilizing different electron donors (acetate, formate, hydrogen, no e - donor) influences key properties such as nanoparticle size, Pd(II):Pd(0) ratio, and cellular location. Controlling nanoparticle size and location controls the activity of bio-Pd for the reduction of 4-nitrophenol, whereas high Pd loading on cells synthesizes bio-Pd with high activity, comparable to commercial Pd/C, for Suzuki-Miyaura coupling reactions. Additionally, the study demonstrates the novel synthesis of microbially-supported ≈2 nm PdO nanoparticles due to the hydrolysis of biosorbed Pd(II) in bicarbonate buffer. Bio-PdO nanoparticles show superior activity in 4-nitrophenol reduction compared to commercial Pd/C catalysts. Overall, controlling biosynthesis parameters, such as electron donor, metal loading, and solution chemistry, enables tailoring of bio-Pd physicochemical and catalytic properties.
(© 2024 The Authors. Small published by Wiley‐VCH GmbH.)
Databáze: MEDLINE
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