On the role of ruthenium associated with Pd and/or Bi in carbon-supported catalysts for the partial oxidation of glucose

Hermans, Sophie; Devillers, Michel

doi:10.1016/s0926-860x(02)00269-7

Cited by 47 publications

(48 citation statements)

References 42 publications

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“…This nding can account for the best dispersion of HPA in the material prepared solvothermically. Indeed, the more dened peaks can be due to the heterogeneity of the dispersion of PW 12 in the P25 impregnated sample, as conrmed by SEM (see in the following). Fig.…”

Section: Characterization Of the Photocatalystsmentioning

confidence: 94%

“…The arrangement structure of the PW 12 and 810 cm À1 attributed to two types of W-O-W units. 33 It is difficult to characterize the Keggin structure in the composites by IR spectroscopy because some of the bands overlap with those assigned to TiO 2 powder; the latter, in fact, presents an intense and broad vibration band originated from Ti-O-Ti bonds located at wavenumbers lower than 900 cm…”

Section: Characterization Of the Photocatalystsmentioning

confidence: 96%

“…In Fig. 1(A) the diffractograms correspond to the bare PW 12 , commercial TiO 2 Evonik P25 (in the following named only TiO 2 P25) and the composites obtained with these two substances. The PW 12 presents a crystalline structure and the commercial TiO 2 P25 consists of anatase and rutile polymorphs.…”

Section: Characterization Of the Photocatalystsmentioning

confidence: 99%

“…The commercial saturated H 3 PW 12 O 40 (labelled as PW 12 ) and the home prepared lacunary monovacant K 7 PW 11 O 39 Keggin salt (labelled as PW 11 ) were coupled by a solvothermal treatment with TiO 2 obtaining PW 12 /TiO 2 and PW 11 /TiO 2 composite materials. Moreover, also the impregnation of the saturated Keggin unit PW 12 on commercial TiO 2 surface was performed for the sake of comparison.…”

mentioning

confidence: 99%

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Photocatalytic conversion of glucose in aqueous suspensions of heteropolyacid–TiO₂ composites

et al. 2015

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Commercial and home prepared TiO 2 samples were functionalized with a commercial Keggin heteropolyacid (HPA) H 3 PW 12 O 40 (PW 12 ) or with a hydrothermally home prepared K 7 PW 11 O 39 salt (PW 11 ).All the materials were characterized by specific surface area measurements (BET), XRD analyses, Raman, DRS along with SEM observations and they have been used for glucose photocatalytic conversion in an aqueous suspension. Different reaction extents and distribution of intermediate oxidation products were observed depending on the photocatalyst. Gluconic acid, arabinose, erythrose and formic acid were observed as oxidation products when bare TiO 2 or HPA/TiO 2 composite materials were used. Glucose isomerization to form fructose was also observed and in some runs traces of glucaric acid and glyceraldehyde were also found. The carbon mass balance was accomplished in the presence of the commercial Evonik P25 TiO 2 powder and the composites where TiO 2 was present, whereas the presence of the solvothermically prepared TiO 2 gave rise to a carbon unbalance, due to strong adsorption of the products on the photocatalyst surface. No reactivity was observed in the presence of PW 12 alone while PW 11 induced only isomerization of the glucose.

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Section: Characterization Of the Photocatalystsmentioning

confidence: 94%

Section: Characterization Of the Photocatalystsmentioning

confidence: 96%

Section: Characterization Of the Photocatalystsmentioning

confidence: 99%

mentioning

confidence: 99%

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Photocatalytic conversion of glucose in aqueous suspensions of heteropolyacid–TiO₂ composites

et al. 2015

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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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Influence of the Support and the Size of Gold Clusters on Catalytic Activity for Glucose Oxidation

et al. 2008

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Nicht alles was glänzt …︁ Die Aktivität immobilisierter Gold‐Nanopartikel hängt von der Herstellungsmethode ab. Goldcluster mit 2 nm Durchmesser wurden auf nichtreduzierbaren Metalloxiden und Kohlenstoffmaterialien abgeschieden, indem ein fester flüchtiger Goldkomplex in einer Kugelmühle zermahlen und anschließend kalziniert wurde. So erzeugtes Au/ZrO2 und Au/Al2O3 sind extrem leistungsfähige Katalysatoren für die aerobe Oxidation von Glucose.

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On the role of ruthenium associated with Pd and/or Bi in carbon-supported catalysts for the partial oxidation of glucose

Cited by 47 publications

References 42 publications

Photocatalytic conversion of glucose in aqueous suspensions of heteropolyacid–TiO₂ composites

Photocatalytic conversion of glucose in aqueous suspensions of heteropolyacid–TiO₂ composites

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

Influence of the Support and the Size of Gold Clusters on Catalytic Activity for Glucose Oxidation

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On the role of ruthenium associated with Pd and/or Bi in carbon-supported catalysts for the partial oxidation of glucose

Cited by 47 publications

References 42 publications

Photocatalytic conversion of glucose in aqueous suspensions of heteropolyacid–TiO2 composites

Photocatalytic conversion of glucose in aqueous suspensions of heteropolyacid–TiO2 composites

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

Influence of the Support and the Size of Gold Clusters on Catalytic Activity for Glucose Oxidation

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Photocatalytic conversion of glucose in aqueous suspensions of heteropolyacid–TiO₂ composites

Photocatalytic conversion of glucose in aqueous suspensions of heteropolyacid–TiO₂ composites