Functional Resins as Hydrophilic Supports for Nanoclustered Pd(0) and Pd(0)‐Au(0) Catalysts Designed for the Direct Synthesis of Hydrogen Peroxide

Burato, Claudio; Centomo, Paolo; Rizzoli, Maurizio; Biffis, Andrea; Campestrini, Sandro; Corain, Benedetto

doi:10.1002/adsc.200505208

Cited by 54 publications

(43 citation statements)

References 14 publications

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“…Later, it has been discovered that this metal complexing ability of ion-exchange resins can be used in heterogeneous catalysis [399]. Once the resin is loaded with the desired metal, the organic transformation can be realized either in batch [400] or in a continuous process. Moreover, H + carrying cation-exchange resins can be used for acid catalyzed organic reactions [401][402].…”

Section: Ion-exchange Catalysis and Scavengingmentioning

confidence: 99%

Porous polymer particles—A comprehensive guide to synthesis, characterization, functionalization and applications

Gökmen

Prez

2012

Progress in Polymer Science

451

309

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Section: Ion-exchange Catalysis and Scavengingmentioning

confidence: 99%

Porous polymer particles—A comprehensive guide to synthesis, characterization, functionalization and applications

Gökmen

Prez

2012

Progress in Polymer Science

451

309

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“…On the other hand, re-adsorption of H 2 O 2 (a weak acid) is avoided on a strong acidic support, and thus the rate of consecutive reactions of H 2 O 2 minimized. Other supports studied in the past for the direct synthesis of H 2 O 2 include zirconia [40] and sulphonated zirconia [41], fluorinated alumina [42], and carbons functionalized with sulfonic acid groups or sulfonic acid functionalized polystyrene resins (PS-SO 3 H) [43,44] which give excellent performances.…”

Section: Introductionmentioning

confidence: 99%

Performances of Pd Nanoparticles on Different Supports in the Direct Synthesis of H2O2 in CO2-Expanded Methanol

2011

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Catalysts based on Pd supported on SiO 2 , SBA-15, c-Al 2 O 3 and N-CNT were investigated for the direct H 2 O 2 synthesis and decomposition/hydrogenolysis in CO 2 -expanded methanol in batch and semi-batch reactors working at room temperature and a pressure of 6.5 bar. The order of reactivity for the synthesis of H 2 O 2 per g of Pd or for the rate of H 2 O 2 decomposition, or the selectivity to H 2 O 2 does not correlate with the acidity of the support. A relation was observed with the Pd particle sizes, i.e. smaller particles lead to a higher specific activity, but the sample supported on carbon nanotube shows an order of magnitude higher specific activity per g of Pd, indicating the presence of an additional factor attributed to the interaction with the carbon support which determines an intrinsic higher reactivity. However, this higher reactivity corresponds also to a higher activity in the consecutive conversion of H 2 O 2 , probably by hydrogenolysis reaction. A rough relation between activity in H 2 O 2 synthesis and in H 2 O 2 conversion was observed in the samples with the different supports, indicating the similar nature of the active sites responsible for the two reactions. Finally, the analysis of the recyclability of the catalysts and transmission electron microscopy (TEM) characterization data after the catalytic tests indicate that the use of CO 2 -expanded methanol allows improving the catalytic performances in H 2 O 2 direct synthesis due to the enhanced solubility of H 2 and O 2 , but induces a fast catalyst deactivation due to an enhanced mobility and sintering of the supported Pd particles. The effect is present in all the four type of support used.

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“…An application of polyacrylamide type gel for palladium nanocluster catalyzed reaction was reported by Corain. 144,145 Molecularly imprinted polymers (MIPs) are intelligent polymer gels and are well-established as molecular recognition materials but are now being increasingly considered for enzyme-like catalysis. [146][147][148][149][150][151][152] Generally, MIPs are synthesized from functional monomers using radical polymerization or polycondensation.…”

Section: Scheme 21mentioning

confidence: 99%

Novel Recycling System for Organic Synthesis via Designer Polymer-Gel Catalysts

2009

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Functional Resins as Hydrophilic Supports for Nanoclustered Pd(0) and Pd(0)‐Au(0) Catalysts Designed for the Direct Synthesis of Hydrogen Peroxide

Cited by 54 publications

References 14 publications

Porous polymer particles—A comprehensive guide to synthesis, characterization, functionalization and applications

Porous polymer particles—A comprehensive guide to synthesis, characterization, functionalization and applications

Performances of Pd Nanoparticles on Different Supports in the Direct Synthesis of H2O2 in CO2-Expanded Methanol

Novel Recycling System for Organic Synthesis via Designer Polymer-Gel Catalysts

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