Influence of the Preparation Method on Catalytic Properties of Pd/TiO2 Catalysts in the Reaction of Partial Oxidation of Methanol

Wojcieszak, Robert; Blanco, Raquel; Hauwaert, Damien; Carrazán, S.R.G.; Gaigneaux, Éric M.; Ruíz, Patricio

doi:10.2174/2211544711302010006

Cited by 6 publications

(15 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As reported previously, the TiO 2 support was not active under the reaction conditions employed herein. Table presents the results for the performance of the catalysts in the reaction.…”

Section: Resultssupporting

confidence: 58%

“…showed that reduced palladium species perform better in the reaction than oxidized PdO. Wojcieszak et al . demonstrated that reduced palladium nanoparticles prepared by a microemulsion method (MicE) are promising catalysts for the green production of MF, that is, at ambient pressure and T =353 K. This contribution concerns the green aerobic oxidation, at ambient pressure and T =323 K, of MeOH to MF over TiO 2 ‐supported Pd( z )Pt(1− z ) catalysts.…”

Section: Introductionmentioning

confidence: 99%

“…This bimetallic system was selected to benefit from the probable synergetic effects coming from the individual properties of each metal in oxidation. On the one hand, platinum is known to be a very efficient catalyst in oxidation reactions, and, on the other hand, palladium has shown a high selectivity to MF . Several papers report on the synergy between Pd and Pt for diverse reactions such as the hydrogenation of aromatics and oxygenates, and the combustion of hydrocarbons .…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the methodology adopted herein includes a study of the effect of the bulk Pd/(Pd+Pt) molar ratio ( z ) on the physicochemical and catalytic properties of two series of TiO 2 ‐supported Pd( z )Pt(1− z ) materials. The first series of catalysts was prepared by an incipient wetness (co‐)impregnation (IWI method) and the second by the in situ reduction of metal precursors in a water‐in‐oil microemulsion (MicE method) . Important differences between these two methods exist.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Synergetic Behavior of TiO₂‐Supported Pd(z)Pt(1−z) Catalysts in the Green Synthesis of Methyl Formate

et al. 2016

View full text Add to dashboard Cite

Methyl formate (MF) is a valuable platform molecule, the industrial production of which is far from being green. In this contribution, TiO2‐supported Pd(z)Pt(1−z) catalysts were found to be effective in the green synthesis of methyl formate (MF)—at T=323 K and ambient pressure—through methanol (MeOH) oxidation. Two series of catalysts with similar bulk Pd/(Pd+Pt) molar ratios, z, were prepared; one by a water‐in‐oil microemulsion (MicE) method and the other by an incipient wetness impregnation (IWI). The MicE method led to more efficient catalysts owing to a weak influence of z on particle size distributions and nanoparticles composition. Pd(z)Pt(1−z)‐MicE catalysts exhibited strong synergistic effects for MF production but weak synergistic effects for MeOH conversion. The catalytic performance of Pd(z)Pt(1−z)‐MicE was superior to that of Pd(z)Pt(1−z)‐IWI catalysts despite the latter displaying synergetic effects during the reaction. The catalytic behavior of TiO2‐supported Pd(z)Pt(1−z) catalysts was explained from correlations between XRD, TEM, and X‐ray photoelectron spectroscopy characterizations.

show abstract

“…As reported previously, the TiO 2 support was not active under the reaction conditions employed herein. Table presents the results for the performance of the catalysts in the reaction.…”

Section: Resultssupporting

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Synergetic Behavior of TiO₂‐Supported Pd(z)Pt(1−z) Catalysts in the Green Synthesis of Methyl Formate

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Wojcieszak's group prepared Pd/TiO 2 using different methods (wet-impregnation, sol-gel, hydrazine reduction, and reverse microemulsion) and obtained very low surface areas (8-9 m 2 /g) [28]. Obuya and her team did apply electrospinning in preparing the same catalyst and obtained a catalyst with a surface area of 93 m 2 /g which was quite high compared to the one reported in this thesis.…”

Section: Bet Analysismentioning

confidence: 68%

Preparation and Characterization of Pd Modified TiO₂ Nanofiber Catalyst for Carbon–Carbon Coupling Heck Reaction

Nyangasi

Andala

Onindo

et al. 2017

Journal of Nanomaterials

View full text Add to dashboard Cite

TiO 2 fibers were prepared through electrospinning of poly methyl methacrylate (PMMA) and titanium isopropoxide (TIP) solution followed by calcination of fibers in air at 500 ∘ C. Cetyltrimethylammonium bromide (CTAB) protected palladium nanoparticles (Pd NPs) prepared through reduction method were successfully adsorbed on the TiO 2 nanofibers (NF). Combined studies of X-ray diffraction (XRD), scanning electron microscope (SEM), and transmission electron microscope (TEM) indicated that the synthesized Pd/TiO 2 had anatase. BET indicated that the synthesized TiO 2 and Pd/TiO 2 had a surface area of 53.4 and 43.4 m 2 /g, respectively. The activity and selectivity of 1 mol% Pd/TiO 2 in the Heck reaction have been investigated towards the Mizoroki-Heck carbon-carbon cross-coupling of bromobenzene (ArBr) and styrene. Temperature, time, solvent, and base were optimized and catalyst was recycled thrice.1 H NMR and 13 C NMR indicated that stilbene, a known compound from literature, was obtained in various Heck reactions at temperatures between 100 ∘ C and 140 ∘ C but the recyclability was limited due to some palladium leaching and catalyst poisoning which probably arose from some residual carbon from the polymer. The catalyst was found to be highly active under air atmosphere with reaction temperatures up to 140 ∘ C. Optimized reaction condition resulted in 89.7% conversions with a TON of 1993.4 and TOF value of 332.2 hr −1 .

show abstract

Pd nanoparticles immobilized on MIL-53(Al) as highly effective bifunctional catalysts for oxidation of liquid methanol to methyl formate

Liu

Qin

et al. 2019

Pet. Sci.

View full text Add to dashboard Cite

Influence of the Preparation Method on Catalytic Properties of Pd/TiO2 Catalysts in the Reaction of Partial Oxidation of Methanol

Cited by 6 publications

References 16 publications

Synergetic Behavior of TiO₂‐Supported Pd(z)Pt(1−z) Catalysts in the Green Synthesis of Methyl Formate

Synergetic Behavior of TiO₂‐Supported Pd(z)Pt(1−z) Catalysts in the Green Synthesis of Methyl Formate

Preparation and Characterization of Pd Modified TiO₂ Nanofiber Catalyst for Carbon–Carbon Coupling Heck Reaction

Pd nanoparticles immobilized on MIL-53(Al) as highly effective bifunctional catalysts for oxidation of liquid methanol to methyl formate

Contact Info

Product

Resources

About

Influence of the Preparation Method on Catalytic Properties of Pd/TiO2 Catalysts in the Reaction of Partial Oxidation of Methanol

Cited by 6 publications

References 16 publications

Synergetic Behavior of TiO2‐Supported Pd(z)Pt(1−z) Catalysts in the Green Synthesis of Methyl Formate

Synergetic Behavior of TiO2‐Supported Pd(z)Pt(1−z) Catalysts in the Green Synthesis of Methyl Formate

Preparation and Characterization of Pd Modified TiO2 Nanofiber Catalyst for Carbon–Carbon Coupling Heck Reaction

Pd nanoparticles immobilized on MIL-53(Al) as highly effective bifunctional catalysts for oxidation of liquid methanol to methyl formate

Contact Info

Product

Resources

About

Synergetic Behavior of TiO₂‐Supported Pd(z)Pt(1−z) Catalysts in the Green Synthesis of Methyl Formate

Synergetic Behavior of TiO₂‐Supported Pd(z)Pt(1−z) Catalysts in the Green Synthesis of Methyl Formate

Preparation and Characterization of Pd Modified TiO₂ Nanofiber Catalyst for Carbon–Carbon Coupling Heck Reaction