Improved catalytic wet peroxide oxidation of phenol over Pt-Fe2O3/SBA-15: Influence of platinum species and DFT calculations

Kim, Min June; Lee, Min Woo; Lee, Kwan Young

doi:10.1016/j.apsusc.2020.148409

Cited by 10 publications

(3 citation statements)

References 32 publications

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“…were subsequently conducted to gain further insight on the interactions between the Pt and FeOx components in the Pt/FeOx/SBA-15 material. Peaks at around 100 o C were ascribed to the reduction of the positively charged Pt 2+ species [53]. The TPR profiles for Pt/FeOx/SBA-15 catalyst feature a prominent peak at around 350-700 o C which was generally attributed to the reduction of Fe2O3 species.…”

Section: Catalyst Characterizationmentioning

confidence: 96%

Zero-oxidation state precursor assisted fabrication of highly dispersed and stable Pt catalyst for chemoselective hydrogenation of α,β-unsaturated aldehydes

Douthwaite

Huang

et al. 2022

Nano Res.

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The chemoselective hydrogenation of α, β-unsaturated aldehydes is a key strategy for the synthesis of fine chemicals. Herein, we developed an efficient method of depositing Pt particles on FeOx/SBA-15. This strategy is dependent on using a platinum-divinyltetramethyldisiloxane complex (Pt 0 -DVTMS) as the precursor, which we demonstrate can be removed through a H2-treatment under mild conditions. This, in turn, allowed for the synthesis of catalysts with well dispersed Pt particles. The presence of FeOx species also aided Pt dispersion; when coated onto SBA-15, FeOx strongly interacted with dissociated Pt species, inhibiting both Pt aggregation and metal leaching. Using cinnamaldehyde as a model α, β-unsaturated aldehyde, it was demonstrated that this catalyst was highly selective towards the unsaturated alcohol and no obvious loss in activity was observed over five recycles. This catalyst was determined to be significantly more effective than an analogous catalyst prepared using chloroplatinic acid as a precursor, evidencing the importance of using the Pt 0 -DVTMS precursor. We corroborate the excellent catalytic performance to highly dispersed Ptspecies, whereby Pt 0 and Pt 2+ play a critical role in activating H2 and the C=O bond. This research demonstrates that the Pt precursor can have a significant impact on the physicochemical properties and thus, the performance of the final catalyst. It also evidences how metal support interactions can dramatically influence selectivity in such hydrogenation reactions. This novel catalyst preparation protocol, using a DVTMS ligand for Pt impregnation, offers a facile approach to the design of multi-component heterogeneous catalysts.

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Section: Catalyst Characterizationmentioning

confidence: 96%

Zero-oxidation state precursor assisted fabrication of highly dispersed and stable Pt catalyst for chemoselective hydrogenation of α,β-unsaturated aldehydes

Douthwaite

Huang

et al. 2022

Nano Res.

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“…The oxidation reaction order and activation energy were found to be first-order and 72.9 kJ/mol. Kim et al studied the catalytic wet peroxide oxidation (CWPO) of phenolic wastewater using Pt/SBA-15, Fe 2 O 3 /SBA-15, and Pt–Fe 2 O 3 /SBA-15 catalysts. Higher decomposition rates of H 2 O 2 were noticed using Pt/SBA-15 and Pt–Fe 2 O 3 /SBA-15 catalysts than those of the Fe 2 O 3 /SBA-15 catalysts.…”

Section: Introductionmentioning

confidence: 99%

“…The oxidation reaction order and activation energy were found to be first-order and 72.9 kJ/ mol. Kim et al 31 studied the catalytic wet peroxide oxidation (CWPO) of phenolic wastewater using Pt/SBA- Makatsa et al 32 published a review paper on CWAO, and they reported that the CWAO technique is a useful and robust technique for the treatment of toxic organic pollutants such as phenol. The reaction mechanisms, kinetics, and computational fluid dynamics (CFD) modeling of the CWAO of phenol were highlighted.…”

Section: Introductionmentioning

confidence: 99%

Performance of Mesoporous Ceria-Supported Pt Catalysts for Oxidative Degradation of Aqueous Solution of Toxic Phenol in a Continuous Fixed Bed Reactor: Optimization of Reaction Conditions, Kinetics, Catalyst Stability, and Characterization

Barman,

Basu,

Roy

2023

Ind. Eng. Chem. Res.

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Using innovative copper-loaded activated alumina (Cu/AA) as the catalyst for catalytic wet peroxidation (CWPO) of catechol

Gosu

Dhakar

Zhang

et al. 2023

Environ Sci Pollut Res

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As a low-cost technology, the catalytic wet-peroxidation (CWPO) process can be operated without lamps and at atmospheric temperature and pressure. Currently, many studies focus on developing new catalysts for CWPO to increase the catalysts' stability and e ciency. In this study, copper-loaded activated alumina (Cu/AA) was synthesized and used for the CWPO of catechol (a representative refractory organic pollutant). Various characterization techniques were deployed to characterize the catalysts, e.g., activated alumina (AA), as well as pristine and spent 1% Cu/AA. The innovative 1% Cu/AA catalyst exhibited good thermal stability up to 1173 K with a marginal weight loss of 13%. The Cu species were well dispersed on the activated alumina framework with no signi cant cluster formation. Typically, copper particles with a diameter of 20.74 nm were dispersed on the AA framework. Catechol removal was observed to be 92% with 87% mineralization at optimized conditions (initial catechol concentration = 200 mg/L, catalyst dose of 1% Cu/AA = 1 g; temperature = 323 K; pH = 6; and H 2 O 2 /catechol stoichiometric ratio = 0.5). The mineralization of catechol was analyzed using mass spectroscopy with the associated mechanism being elucidated. Results of this study indicate the synthesized catalyst has phenomenal advantages in terms of simple separation and high removal e ciency of catechol, indicating the feasibility of using Cu/AA as the catalyst for the CWPO of catechol.

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Improved catalytic wet peroxide oxidation of phenol over Pt-Fe2O3/SBA-15: Influence of platinum species and DFT calculations

Cited by 10 publications

References 32 publications

Zero-oxidation state precursor assisted fabrication of highly dispersed and stable Pt catalyst for chemoselective hydrogenation of α,β-unsaturated aldehydes

Zero-oxidation state precursor assisted fabrication of highly dispersed and stable Pt catalyst for chemoselective hydrogenation of α,β-unsaturated aldehydes

Performance of Mesoporous Ceria-Supported Pt Catalysts for Oxidative Degradation of Aqueous Solution of Toxic Phenol in a Continuous Fixed Bed Reactor: Optimization of Reaction Conditions, Kinetics, Catalyst Stability, and Characterization

Using innovative copper-loaded activated alumina (Cu/AA) as the catalyst for catalytic wet peroxidation (CWPO) of catechol

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