A new environmental friendly method for the preparation of sugar acids via catalytic oxidation on gold catalysts

Mirescu, Agnes; Prüße, Ulf

doi:10.1016/j.apcatb.2006.01.017

Cited by 131 publications

(115 citation statements)

References 20 publications

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“…Selective catalytic oxidation of D-glucose with heterogeneous catalyst is part of the principles of green chemistry to produce D-gluconic acid [148]. Heterogeneous catalysis shows excellent activity and selectivity for the oxidation of aldoses [10,15,93,94]. The heterogeneous catalytic oxidations are mainly performed with air or oxygen in aqueous medium and in the presence of a supported noble metal catalyst.…”

Section: Gluconic Acidmentioning

confidence: 99%

Catalytic Conversion of Lignocellulosic Biomass to Value-Added Organic Acids in Aqueous Media

Lin

Liu

et al. 2014

Green Chemistry and Sustainable Technology

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The transition from today's fossil-based economy to a sustainable economy based on renewable biomass is driven by the concern of climate change and anticipation of dwindling fossil resources. Although biofuels are the central theme of the transition, biomass resources cannot completely replace petroleum. It is projected that biofuels can only supply up to 30 % of today's transportation fuel market even if all available domestic biomass resources are used for the production of liquid fuels. Therefore, transformation of biomass into high-value-added chemicals is advantageous to secure optimal use of the abundant, but limited, biomass resources from the economical and ecological perspective. Industry is increasingly considering bio-based chemical production as an attractive area for investment. The potential for chemical and polymer production from biomass is substantial. The US Department of Energy recently issued a report which listed 12 chemical building blocks considered as potential building blocks for the future. Organic acids (e.g., succinic, lactic, levulinic acid, etc.) are among the widely spread ''platform-molecules,'' which may be further converted into possibly derivable high-value-added chemicals. The transition from a fossil chemical industry to a renewable chemical industry will likewise depend on our ability to focus research and development efforts on the most promising alternatives. In this chapter, we review the emerging technologies on catalytic conversion of biomass to value-added organic acids in aqueous media.

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Section: Gluconic Acidmentioning

confidence: 99%

Catalytic Conversion of Lignocellulosic Biomass to Value-Added Organic Acids in Aqueous Media

Lin

Liu

et al. 2014

Green Chemistry and Sustainable Technology

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“…[48,49] In this regard, heterogeneous catalysis in aqueous solution seems to be valuable and environmentally friendly and good alternatives to the biochemical process. Consequently, attempt has been made recently to replace the use of enzymes in the biochemical processes by supported and unsupported mono-and bimetallic NPs.…”

Section: Catalytic Activities Of Polygonal Gnps In Aerobic Oxidation mentioning

confidence: 99%

Templateless Synthesis of Polygonal Gold Nanoparticles: An Unsupported and Reusable Catalyst with Superior Activity

Rashid¹,

Mandal²

2008

Adv Funct Materials

146

108

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We report the synthesis of polygonal gold nanoparticles (GNPs) by an in situ reduction technique using ferric ammonium citrate as reducing agent in absence of any surfactant or polymeric template. Transmission electron microscopic analysis and selected area electron diffraction patterns confirmed the formation of well‐crystalline polygonal GNPs grown preferentially along the (111) direction, which is consistent with the results of X‐ray diffractometry analysis. The results of control experiments of HAuCl4 with tri‐ammonium citrate in presence of different externally added metal ions like Fe3+, Ni2+, Cu2+, Zn2+, and Al3+ suggested the ion‐induced growth mechanism in the formation of polygonal GNPs. The purified polygonal GNPs were then successfully used as catalyst in the borohydride reduction of three isomeric nitrophenols and also in the aerobic oxidation of different D‐hexoses (e.g., D‐glucose, D‐mannose, D‐fructose). The catalytic activity of these polygonal GNPs is higher by a factor of 300–1000, depending on the GNP's sample type, in nitrophenol reduction compared to that of spherical GNPs. Similar activity enhancement was also observed in the aerobic oxidation of different D‐hexoses. These polygonal GNPs catalyst are very stable and could be reused several times in the borohydride reduction of nitrophenols without much losing in their virgin catalytic activity.

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“…[2][3][4] Compared with Pd and Pt catalysts, supported Au catalysts have shown higher catalytic activity with excellent selectivity to gluconic acid as reported. [5][6][7] Rossi and his co-workers 5 attributed this high catalytic performance to the higher resistivity of Au catalyst to overoxidation and self-poisoning compared to Pt or Pd.…”

Section: Introductionmentioning

confidence: 99%

Mesoporous carbon-confined Au catalysts with superior activity for selective oxidation of glucose to gluconic acid

Xue

et al. 2013

Green Chem.

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A series of ordered mesoporous carbon (OMC)-supported Au catalysts were successfully prepared by nano-replication, followed by colloidal gold deposition method. Structural analysis showed that the mesopore sizes of the catalysts can be tuned controllably in the range of 3.2-7.6 nm by adjusting the dosage of boric acid used to prepare the carbon supports. TEM observations revealed that the Au nanoparticles were dispersed uniformly in the mesopore channels of the carbon supports. These Au/OMC catalysts were tested for the aerobic oxidation of glucose to produce gluconic acid at 40°C and pH 9. As demonstrated by the structural analysis and reaction results, the activities of these catalysts were closely related to their mesopore sizes. The catalyst with a mesopore size of 5.4 nm exhibited a superior catalytic activity with a TOF of 4.308 mol glucose mol Au −1 s −1 to the catalysts reported previously by other researchers. This high activity was mainly ascribed to its unique structure, consisting of 5.4 nm mesopore channels incorporated with 3.3 nm Au nanoparticles, which facilitates contact between glucose molecules and Au nanoparticles. Besides, the abundant active oxygen species existing on this catalyst surface also promote glucose oxidation.

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A new environmental friendly method for the preparation of sugar acids via catalytic oxidation on gold catalysts

Cited by 131 publications

References 20 publications

Catalytic Conversion of Lignocellulosic Biomass to Value-Added Organic Acids in Aqueous Media

Catalytic Conversion of Lignocellulosic Biomass to Value-Added Organic Acids in Aqueous Media

Templateless Synthesis of Polygonal Gold Nanoparticles: An Unsupported and Reusable Catalyst with Superior Activity

Mesoporous carbon-confined Au catalysts with superior activity for selective oxidation of glucose to gluconic acid

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