Tuning activity of Pt/FeOx/TiO2 catalysts synthesized through selective-electrostatic adsorption for hydrogen purification by prox reaction

Navas‐Cárdenas, Carlos; Benito, Noelia; Wolf, E. L.

doi:10.1016/j.ijhydene.2022.04.192

Cited by 11 publications

(3 citation statements)

References 72 publications

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“…Being MB a positively charged dye, its adsorption on the catalyst surface strongly depends on the charge of the catalyst surface itself. Point of zero charge values reported for TiO 2 are ranging from 5.0 and 6.2 [33][34][35][36][37][38], while the MB solution pH has been measured to be 6.2. TiO 2 surface is very sensitive to the presence of H + ions in the solution, since it is rich in terminal hydroxyl groups.…”

Section: Photocatalytic Activitymentioning

confidence: 99%

Titania nanorods array homojunction with sub-stoichiometric TiO2 for enhanced methylene blue photodegradation

et al. 2023

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Section: Photocatalytic Activitymentioning

confidence: 99%

Titania nanorods array homojunction with sub-stoichiometric TiO2 for enhanced methylene blue photodegradation

et al. 2023

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“…And SiO 2 is an inert support for 4 nm CeO 2 nano-islands which only inhibits the agglomeration of CeO 2 by electrostatic adsorption. 11,12,37–40…”

Section: Introductionmentioning

confidence: 99%

“…And SiO 2 is an inert support for 4 nm CeO 2 nano-islands which only inhibits the agglomeration of CeO 2 by electrostatic adsorption. 11,12,[37][38][39][40] The mechanism of SRS is based on the universal existence of reductive centers on reducible metal oxides. 41 In the example of the (Pt/4nmCeO 2 )/SiO 2 pyramid-type catalyst, the 4 nm CeO 2 nano-islands, instead of SiO 2 , can reduce the Pt precursor (H 2 PtCl 6 ) to anchored highly dispersed metallic Pt species with its reductive centers such as Ce 3+ and surface adsorbed H species as shown in Scheme 1(B).…”

Section: Introductionmentioning

confidence: 99%

Bottom-up synthesis of a pyramid-type (Pt/4nmCeO₂)/SiO₂ catalyst via a surface reduction strategy

Han

Zhang

Xu³

et al. 2023

J. Mater. Chem. A

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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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Tuning activity of Pt/FeOx/TiO2 catalysts synthesized through selective-electrostatic adsorption for hydrogen purification by prox reaction

Cited by 11 publications

References 72 publications

Titania nanorods array homojunction with sub-stoichiometric TiO2 for enhanced methylene blue photodegradation

Titania nanorods array homojunction with sub-stoichiometric TiO2 for enhanced methylene blue photodegradation

Bottom-up synthesis of a pyramid-type (Pt/4nmCeO₂)/SiO₂ catalyst via a surface reduction strategy

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

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Tuning activity of Pt/FeOx/TiO2 catalysts synthesized through selective-electrostatic adsorption for hydrogen purification by prox reaction

Cited by 11 publications

References 72 publications

Titania nanorods array homojunction with sub-stoichiometric TiO2 for enhanced methylene blue photodegradation

Titania nanorods array homojunction with sub-stoichiometric TiO2 for enhanced methylene blue photodegradation

Bottom-up synthesis of a pyramid-type (Pt/4nmCeO2)/SiO2 catalyst via a surface reduction strategy

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

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Product

Resources

About

Bottom-up synthesis of a pyramid-type (Pt/4nmCeO₂)/SiO₂ catalyst via a surface reduction strategy