Novel catalytically active Pd/Ru bimetallic nanoparticles synthesized by Bacillus benzeovorans View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2019-12

AUTHORS

Jacob B. Omajali, Jaime Gomez-Bolivar, Iryna P. Mikheenko, Surbhi Sharma, Bayonle Kayode, Bushra Al-Duri, Dipanjan Banerjee, Marc Walker, Mohamed L. Merroun, Lynne E. Macaskie

ABSTRACT

Bacillus benzeovorans assisted and supported growth of ruthenium (bio-Ru) and palladium/ruthenium (bio-Pd@Ru) core@shell nanoparticles (NPs) as bio-derived catalysts. Characterization of the bio-NPs using various electron microscopy techniques and high-angle annular dark field (HAADF) analysis confirmed two NP populations (1-2 nm and 5-8 nm), with core@shells in the latter. The Pd/Ru NP lattice fringes, 0.231 nm, corresponded to the (110) plane of RuO2. While surface characterization using X-ray photoelectron spectroscopy (XPS) showed the presence of Pd(0), Pd(II), Ru(III) and Ru(VI), X-ray absorption (XAS) studies of the bulk material confirmed the Pd speciation (Pd(0) and Pd(II)- corresponding to PdO), and identified Ru as Ru(III) and Ru(IV). The absence of Ru-Ru or Ru-Pd peaks indicated Ru only exists in oxide forms (RuO2 and RuOH), which are surface-localized. X ray diffraction (XRD) patterns did not identify Pd-Ru alloying. Preliminary catalytic studies explored the conversion of 5-hydroxymethyl furfural (5-HMF) to the fuel precursor 2,5-dimethyl furan (2,5-DMF). Both high-loading (9.7 wt.% Pd, 6 wt.% Ru) and low-loading (2.4 wt.% Pd, 2 wt.% Ru) bio-derived catalysts demonstrated high conversion efficiencies (~95%) and selectivity of ~63% (~20% better than bio-Ru NPs) and 58%, respectively. These materials show promising future scope as efficient low-cost biofuel catalysts. More... »

PAGES

4715

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/s41598-019-40312-3

DOI

http://dx.doi.org/10.1038/s41598-019-40312-3

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1112858338

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/30886177


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