From bio-mineralisation to fuel cells: biomanufacture of Pt and Pd nanocrystals for fuel cell electrode catalyst

Yong, Ping; Paterson-Beedle, Marion; Mikheenko, Iryna P.; Macaskie, Lynne E.

doi:10.1007/s10529-006-9283-4

Cited by 48 publications

(59 citation statements)

References 12 publications

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“…Desulfovibrio desulfuricans was as described previously (Yong et al 2007). R. sphaeroides OU001 was grown as described by Redwood (2007).…”

Section: Methodsmentioning

confidence: 99%

“…For experiments to test the utility of ‗palladised' cells in a fuel cell D. desulfuricans (reference organism: Yong et al 2007) and E. coli strains (this study) were grown as described by Yong et al (2002) and Penfold et al (2006), respectively. Cells were palladised as described previously (5% Pd by mass; Yong et al, 2007), washed in acetone dried and ground, and then transferred into 10 mL alumina ceramic crucibles for sintering (i.e.…”

Section: Preparation Of Fuel Cell Electrode Materialsmentioning

confidence: 99%

“…Cells were palladised as described previously (5% Pd by mass; Yong et al, 2007), washed in acetone dried and ground, and then transferred into 10 mL alumina ceramic crucibles for sintering (i.e. carbonising) in a programmable furnace.…”

Section: Preparation Of Fuel Cell Electrode Materialsmentioning

confidence: 99%

“…These utilise precious metal catalyst to split the H 2 for electricity production; hence the second target for process improvement is the fuel cell itself since robustness is a major limitation for commercial development (Aki et al 2005;above). Previous work showed that spent yeast biomass, coated with platinum nanoparticles can function as the anode material in a proton exchange membrane fuel Cell (PEMFC) (Dimitriadis et al 2007) while a parallel study showed that D. desulfuricans could behave similarly when coated with either Pd(0) or Pt(0) nanoparticles fabricated via the hydrogenase-mediated reduction of Pd(II) or Pt(IV) (Yong et al 2007). The PEMFC power output was comparable to commercial Pt(0) fuel cell catalyst under similar conditions (Yong et al 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Previous work showed that spent yeast biomass, coated with platinum nanoparticles can function as the anode material in a proton exchange membrane fuel Cell (PEMFC) (Dimitriadis et al 2007) while a parallel study showed that D. desulfuricans could behave similarly when coated with either Pd(0) or Pt(0) nanoparticles fabricated via the hydrogenase-mediated reduction of Pd(II) or Pt(IV) (Yong et al 2007). The PEMFC power output was comparable to commercial Pt(0) fuel cell catalyst under similar conditions (Yong et al 2007). Cells of E. coli can fulfil a similar role but the power output using Bio-Pd E. coli was substantially lower than that obtained by using Bio-Pd D. desulfuricans (Yong et al 2008).…”

Section: Introductionmentioning

confidence: 99%

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Towards an integrated system for bio-energy: hydrogen production by Escherichia coli and use of palladium-coated waste cells for electricity generation in a fuel cell

et al. 2010

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Escherichia coli strains MC4100 (parent) and a mutant strain derived from this (IC007) were evaluated for their ability to produce hydrogen and organic acids (OAs) via fermentation. Following growth, each strain was coated with Pd(0) via bioreduction of Pd(II). Dried, sintered Pd-biomaterials (‗Bio-Pd') were tested as anodes in a proton exchange membrane (PEM) fuel cell for their ability to generate electricity from hydrogen. Both strains produced hydrogen and OAs but ‗palladized' cells of strain IC007 (BioPd IC007 ) produced ~ 3-fold more power as compared to Bio-PdMC4100 (56 and 18 mW respectively). The power output using, for comparison, commercial Pd(0) powder and Bio-Pd made from Desulfovibrio desulfuricans, was ~100 mW. The implications of these findings for an integrated energy generating process are discussed.

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“…Desulfovibrio desulfuricans was as described previously (Yong et al 2007). R. sphaeroides OU001 was grown as described by Redwood (2007).…”

Section: Methodsmentioning

confidence: 99%

Section: Preparation Of Fuel Cell Electrode Materialsmentioning

confidence: 99%

Section: Preparation Of Fuel Cell Electrode Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Towards an integrated system for bio-energy: hydrogen production by Escherichia coli and use of palladium-coated waste cells for electricity generation in a fuel cell

et al. 2010

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Formation of palladium(0) nanoparticles at microbial surfaces

Bunge

Søbjerg

Rotaru

et al. 2010

Biotech & Bioengineering

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The increasing demand and limited natural resources for industrially important platinum-group metal (PGM) catalysts render the recovery from secondary sources such as industrial waste economically interesting. In the process of palladium (Pd) recovery, microorganisms have revealed a strong potential. Hitherto, bacteria with the property of dissimilatory metal reduction have been in focus, although the biochemical reactions linking enzymatic Pd(II) reduction and Pd(0) deposition have not yet been identified. In this study we investigated Pd(II) reduction with formate as the electron donor in the presence of Gram-negative bacteria with no documented capacity for reducing metals for energy production: Cupriavidus necator, Pseudomonas putida, and Paracoccus denitrificans. Only large and close-packed Pd(0) aggregates were formed in cell-free buffer solutions. Pd(II) reduction in the presence of bacteria resulted in smaller, well-suspended Pd(0) particles that were associated with the cells (called "bioPd(0)" in the following). Nanosize Pd(0) particles (3-30 nm) were only observed in the presence of bacteria, and particles in this size range were located in the periplasmic space. Pd(0) nanoparticles were still deposited on autoclaved cells of C. necator that had no hydrogenase activity, suggesting a hydrogenase-independent formation mechanism. The catalytic properties of Pd(0) and bioPd(0) were determined by the amount of hydrogen released in a reaction with hypophosphite. Generally, bioPd(0) demonstrated a lower level of activity than the Pd(0) control, possibly due to the inaccessibility of the Pd(0) fraction embedded in the cell envelope. Our results demonstrate the suitability of bacterial cells for the recovery of Pd(0), and formation and immobilization of Pd(0) nanoparticles inside the cell envelope. However, procedures to make periplasmic Pd(0) catalytically accessible need to be developed for future nanobiotechnological applications.

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Exoelectrogenic biofilm as a template for sustainable formation of a catalytic mesoporous structure

Yates

Cusick

Ivanov

et al. 2014

Biotech & Bioengineering

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Mesoporous structures can increase catalytic activity by maximizing the ratio of surface area to volume, but current synthesis techniques utilize expensive polymers and toxic chemicals. A Geobacter sulfurreducens biofilm was used as a sustainable template to form mesoporous Pd structures while eliminating the need for synthetic chemicals. The bulk of the biofilm material was removed by thermal treatments after nanoparticle formation, producing a catalytic Pd mesoporous (pore size 9.7 AE 0.1 nm) structure attached to the graphite electrode with a 1.5-2 mm thick backbone composed of nanoparticles ($200 nm). A control electrode electrochemically plated with Pd in the absence of a biofilm exhibited a variable planar Pd base ($0.5-3 mm thick) with sporadic Pd extrusions ($2 mm across, 1-5 mm tall) from the surface. The biotemplated mesoporous structure produced 15-20% higher stable current densities during H 2 oxidation tests than the electrochemically plated control electrode, even though 30% less Pd was present in the biotemplated catalyst. These results indicate that electroactive biofilms can be used as a sustainable base material to produce nanoporous structures without the need for synthetic polymers.

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From bio-mineralisation to fuel cells: biomanufacture of Pt and Pd nanocrystals for fuel cell electrode catalyst

Cited by 48 publications

References 12 publications

Towards an integrated system for bio-energy: hydrogen production by Escherichia coli and use of palladium-coated waste cells for electricity generation in a fuel cell

Towards an integrated system for bio-energy: hydrogen production by Escherichia coli and use of palladium-coated waste cells for electricity generation in a fuel cell

Formation of palladium(0) nanoparticles at microbial surfaces

Exoelectrogenic biofilm as a template for sustainable formation of a catalytic mesoporous structure

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