@misc{10481/57396,
year = {2019},
month = {6},
url = {http://hdl.handle.net/10481/57396},
abstract = {Escherichia coli cells support the nucleation and growth of ruthenium and
ruthenium-palladium nanoparticles (Bio-Ru and Bio-Pd/Ru NPs). We report a method
for the synthesis of these monometallic and bimetallic NPs and their application
in the catalytic upgrading of 5-hydroxymethyl furfural (5-HMF) to 2,5 dimethylfuran
(DMF). Examination using high resolution transmission electron microscopy with energy
dispersive X-ray microanalysis (EDX) and high angle annular dark field (HAADF) showed
Ru NPs located mainly at the cell surface using Ru(III) alone but small intracellular
Ru-NPs (size  1–2 nm) were visible only in cells that had been pre-“seeded”
with Pd(0) (5 wt%) and loaded with equimolar Ru. Pd(0) NPs were distributed
between the cytoplasm and cell surface. Cells bearing 5% Pd/5% Ru showed some
co-localization of Pd and Ru but chance associations were not ruled out. Cells loaded
to 5 wt% Pd/20 wt% Ru showed evidence of core-shell structures (Ru core, Pd
shell). Here,
with MTHF as the reaction solvent the commercial Ru/C catalyst had little activity
(100% conversion, negligible selectivity to DMF) whereas the 5 wt% Pd/5 wt% Rubio-bimetallic gave 100% conversion and 14% selectivity to DMF from material extracted
from hydrolyzates. The results indicate a potential green method for realizing increased
energy potential from biomass wastes as well as showing a bio-based pathway to
manufacturing a scarcely described bimetallic material.},
organization = {The project was funded by NERC grant NE/L014076/1 to LM
(Program: “Resource Recovery from Wastes”). The Science City
Photoemission Facility used in this research was funded through
the Science Cities Advanced Materials Project 1: “Creating and
Characterizing Next Generation of Advanced Materials” with
support from AWM and ERDF funds. The microscopy work
was conducted at “Centro de Instrumentación Cientifica” at the
University of Granada, Spain.},
publisher = {Frontiers Media},
keywords = {ruthenium bionanoparticles},
keywords = {Pd/Ru core-shells},
keywords = {5-hydroxymethyl furfural conversion},
keywords = {2,5-dimethyl furan synthesis},
keywords = {cellulose conversion},
title = {Synthesis of Pd/Ru Bimetallic Nanoparticles by Escherichia coli and Potential as a Catalyst for Upgrading 5-Hydroxymethyl Furfural Into Liquid Fuel Precursors},
doi = {10.3389/fmicb.2019.01276},
author = {Gómez Bolívar, Jaime and Mikheenko, Iryna P. and Orozco, Rafael and Sharma, Surbhi and Banerjee, Dipanjan and Walker, Marc and Hand, Rachel and Merroun, Mohamed Larbi and Macaskie, Lynne},
}