Palladium supported on bacterial biomass as a novel heterogeneous catalyst: A comparison of Pd/Al2O3 and bio-Pd in the hydrogenation of 2-pentyne

Bennett, James A.; Creamer, N.J.; Deplanche, K.; Macaskie, Lynne E.; Shannon, Ian J.; Wood, Joseph

doi:10.1016/j.ces.2009.06.069

Cited by 46 publications

(52 citation statements)

References 34 publications

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“…The lower activity of Au/C over Pd/C catalysts has been reported previously and it is suggested that Au NPs, when supported on carbon instead of an oxide are not able to extract the hydride from the alcoholic function [26]. Other studies on hydrogenations over bioPd have shown similarly high product selectivity [13,14] and, although the reason(s) behind the increased selectivity of bioPd preparations are still unclear, low conversion yields suggest mass transfer limitations, i.e. some Pd nanoparticles may not be accessible to the reaction substrates.…”

Section: Benzyl Alcohol Oxidation Over Monoand Bimetallic Bioinorganimentioning

confidence: 78%

“…solutions of metal salts) as well as from secondary source leachates [4][5][6][7] with formation of catalytically active mixed metallic mixtures [8] that can have enhanced catalytic activity as compared to monometallic biomaterials [9]. The bioreduction of Pd(II) by Desulfovibrio desulfuricans and Escherichia coli leads to the formation in the bacterial periplasmic space of a population of metallic nanoparticles (NPs) that exhibit remarkable catalytic activity in a wide variety of reactions [10][11][12][13][14]. Similarly, the bioreduction of HAuCl 4 produces biomass-bound Au NPs of varying size (5-50 nm depending on the pH of the precursor solution used, [7] that exhibit a catalytic behaviour similar to chemically prepared Au/C catalysts in the selective oxidation of glycerol to glyceric acid [15].…”

Section: Introductionmentioning

confidence: 99%

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Selective Oxidation of Benzyl-Alcohol over Biomass-Supported Au/Pd Bioinorganic Catalysts

et al. 2011

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We report a novel biochemical method based on the sacrificial hydrogen strategy to synthesise bimetallic Au/Pd nanoparticles supported on bacterial cells. The synergistic effect of Au/Pd over monometallic preparations was demonstrated in the oxidation of benzyl alcohol. The bioinorganic catalysts outperformed a commercial Pd catalyst (5% Pd/C) showing no deactivation and high selectivity towards benzaldehyde.

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Section: Benzyl Alcohol Oxidation Over Monoand Bimetallic Bioinorganimentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Selective Oxidation of Benzyl-Alcohol over Biomass-Supported Au/Pd Bioinorganic Catalysts

et al. 2011

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“…38 The catalytic activity and the selectivity of this catalyst were compared to those of a conventional heterogeneous catalyst such as palladium supported on alumina. The biomass-supported Pd-NP was found to be much less catalytically active, but showed high selectivity in which there was 70% alkyne conversion, which was much higher selectivity than that of conventional palladium supported on alumina.…”

Section: Hydrogenation Of Alkynesmentioning

confidence: 99%

Nanocatalysts for Hydrogenation Reactions

Narayanan

2013

Nanocatalysis Synthesis and Applications

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“…Taking into account also the need to conserve primary resources and recycle precious metals, by applying this biotechnological approach, effective bionanocatalyst can be sourced from metal-containing wastes [21,22], potentially providing a low-cost route to nanocatalyst production with low environmental impact. The precious metal can be easily and economically recovered from the used catalyst by incineration, sonication or microwaving the biomass [6].…”

Section: Introductionmentioning

confidence: 99%

Selective hydrogenation using palladium bioinorganic catalyst

Zhu

Wood

Deplanche

et al. 2016

Applied Catalysis B: Environmental

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a b s t r a c tPalladium bioinorganic catalyst (bio-Pd) was manufactured using bacteria (Desulfovibrio desulfuricans and Escherichia coli) via the reduction of Pd(II) to bio-scaffolded Pd(0) nanoparticles (NPs). The formed Pd NPs were examined using electron microscopy and X-ray powder diffraction methods: a loading of 5 wt% Pd showed an average particle size of ∼4 nm. The catalytic activities of the prepared bio-Pd NPs on both bacteria were compared in two hydrogenation reactions with that of a conventionally supported Pd catalyst (Pd/Al 2 O 3 ). Concentration profiles of the different hydrogenation products were fitted using a Langmuir-Hinshelwood expression. In 2-pentyne hydrogenation, 5 wt% Pd E.coli achieved 100% of 2-pentyne conversion in 20 mins and produced 10.1 ± 0.7 × 10 −2 mol L −1 of desired cis-2-pentene; in contrast 5 wt% Pd/Al 2 O 3 yielded 6.5 ± 0.4 × 10 −2 mol L −1 of cis-2-pentene after 40 mins. In the solvent-free hydrogenation of soybean oil, the use of 5 wt% Pd E.coli yielded cis-C18:1 of 1.03 ± 0.04 mol L −1 and trans-C18:1 of 0.26 ± 0.03 mol L −1 (∼50% less of the latter than 5 wt% Pd/Al 2 O 3 ) after 5 h. Similar results were obtained using bio-Pd E.coli and bio-Pd D.desulfuricans . Bio-Pd was concluded to have the advantage of a lower cis-trans isomerisation in hydrogenation of alkyne/alkenes. Hence biomanufacturing is an environmentally attractive, scalable and facile alternative to conventional heterogeneous catalyst for application in industrial hydrogenation processes. D. desulfuricans is inconvenient to grow at scale but wastes of E. coli are produced from various industrial processes. 'Second life' (i.e. recycled from a pilot scale biohydrogen production process) E. coli cells were used to make bio-Pd catalysts. Although 'bio-Pd secondlife gave a slower conversion rate of 2-pentyne and soybean oil compared to bio-Pd from purpose-grown cells it showed a higher selectivity to the cis-isomer product.

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Palladium supported on bacterial biomass as a novel heterogeneous catalyst: A comparison of Pd/Al2O3 and bio-Pd in the hydrogenation of 2-pentyne

Cited by 46 publications

References 34 publications

Selective Oxidation of Benzyl-Alcohol over Biomass-Supported Au/Pd Bioinorganic Catalysts

Selective Oxidation of Benzyl-Alcohol over Biomass-Supported Au/Pd Bioinorganic Catalysts

Nanocatalysts for Hydrogenation Reactions

Selective hydrogenation using palladium bioinorganic catalyst

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