Nanoceria supported palladium(0) nanoparticles: Superb catalyst in dehydrogenation of formic acid at room temperature

Akbayrak, Serdar; Tonbul, Yalçın; Özkâr, Saim

doi:10.1016/j.apcatb.2017.01.063

Cited by 117 publications

(59 citation statements)

References 67 publications

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“…Many noble-metal-based catalysts show high efficiency for catalytic decomposition of FA and CTH reactions according to Equation (1). [19][20][21][22][23] Few applications of non-noble metal catalysts in CTH with FA have been Fabrication of non-noble metal-based heterogeneous catalysts by af acile and cost-effective strategy for ecofriendly catalytic transfer hydrogenation (CTH) is of great significance for organic transformations. Ac obalt@nitrogen-doped carbon (Co@NC) catalystw as preparedf rom renewable biomass-derived sucrose, harmless melamine, and earth-abundant Co(AcO) 2 as the precursorm aterials by hydrothermal treatment and carbonization.…”

Section: Introductionmentioning

confidence: 99%

Biomass Sucrose‐Derived Cobalt@Nitrogen‐Doped Carbon for Catalytic Transfer Hydrogenation of Nitroarenes with Formic Acid

et al. 2018

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Fabrication of non‐noble metal‐based heterogeneous catalysts by a facile and cost‐effective strategy for ecofriendly catalytic transfer hydrogenation (CTH) is of great significance for organic transformations. A cobalt@nitrogen‐doped carbon (Co@NC) catalyst was prepared from renewable biomass‐derived sucrose, harmless melamine, and earth‐abundant Co(AcO)2 as the precursor materials by hydrothermal treatment and carbonization. Co nanoparticles (NPs) were coated with NC shells and uniformly embedded in the NC framework. The as‐obtained Co@NC‐600 (carbonized at 600 °C) catalyst exhibited excellent catalytic efficiency for CTH of various functionalized nitroarenes with formic acid (FA) as hydrogen donor in aqueous solution. The uniformly incorporated N atoms in the C matrix and the encapsulated Co NPs showed synergistic effects in the CTH reactions. A mechanistic analysis indicated that the protons from FA were activated by Co sites after being captured by N atoms, and then reacted with nitroarenes adsorbed on the surface of the catalysts to generate the corresponding aromatic amines. Moreover, the catalyst showed excellent durability and reusability without obvious decrease in activity even after five reaction cycles. Thus, the study reported herein provides a cost‐effective, sustainable strategy for fabrication of biomass‐derived non‐noble metal‐based catalysts for green and efficient catalytic transformations.

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Section: Introductionmentioning

confidence: 99%

Biomass Sucrose‐Derived Cobalt@Nitrogen‐Doped Carbon for Catalytic Transfer Hydrogenation of Nitroarenes with Formic Acid

et al. 2018

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“…After the loading of Pd, no change is observed in the positions of CeO 2 reflexes indicating that the Pd/CeO 2 keeps the crystal structure of CeO 2 intact. This may be due to the low Pd loading on CeO 2 , or high dispersion of Pd species . However, the decrease in intensity of the XRD reflexes of Pd/CeO 2 as compared to CeO 2 may be due to the lowering of crystallinity or due to the filling of pores which weakens the scattering contrast.…”

Section: Resultsmentioning

confidence: 99%

Palladium‐Supported Nanoceria: A Highly Efficient Catalyst for Solvent‐Free Selective Oxidation of Ethylbenzene to Acetophenone

Kalita

Saikia

2020

ChemistrySelect

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The benzylic C−H oxidation of ethylbenzene, a toxic petroleum waste, to high value‐added acetophenone is a fundamental yet important chemical transformation. Herein, palladium nanoparticles were immobilized on a highly mesoporous CeO2 surface for enhancing the catalytic activity. The Pd/CeO2nanocomposite was employed in the benzylic C−H oxidation of ethylbenzene under solvent‐free conditions and using tert‐butyl hydroperoxide as oxidant which displayed high conversion of 99.8% and a selectivity of 79% towards acetophenone. Moreover, the Pd/CeO2 catalysts were highly stable and could be recycled up to the fifth catalytic cycle without remarkable loss in its catalytic activity.

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“…In contrast, when using the 0.50 and 5.00 wt% Pd-TiO 2 , lower metal dispersions were observed, with larger metal crystallite sizes being detected. This was in line with their diminished photocatalytic hydrogen production activity [59]. To explain these results, one can consider that under visible light and using a Pd-TiO 2 photocatalyst, photons are both absorbed and scattered.…”

Section: Precursor Near Uv-light Photoreductionmentioning

confidence: 67%

Photoreduction of a Pd-Doped Mesoporous TiO2 Photocatalyst for Hydrogen Production under Visible Light

2020

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Photoreduction with visible light can enhance the photocatalytic activity of TiO2 for the production of hydrogen. In this article, we present a strategy to photoreduce a palladium-doped TiO2 photocatalyst by using near-UV light prior to its utilization. A sol-gel methodology was employed to prepare the photocatalysts with different metal loadings (0.25–5.00 wt% Pd). The structural and morphological characteristics of the synthesized Pd-TiO2 were analyzed by using X-ray Diffraction (XRD), BET Surface Area (SBET), TemperatureProgrammed Reduction (TPR), Chemisorption and X-ray Photoelectron Spectroscopy (XPS). Hydrogen was produced by water splitting under visible light irradiation using ethanol as an organic scavenger. Experiments were developed in the Photo-CREC Water-II (PCW-II) Reactor designed at the CREC-UWO (Chemical Reactor Engineering Centre). It was shown that the mesoporous 0.25 wt% Pd-TiO2 with 2.5 1eV band gap exhibits, under visible light, the best hydrogen production performance, with a 1.58% Quantum Yield being achieved.

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Nanoceria supported palladium(0) nanoparticles: Superb catalyst in dehydrogenation of formic acid at room temperature

Cited by 117 publications

References 67 publications

Biomass Sucrose‐Derived Cobalt@Nitrogen‐Doped Carbon for Catalytic Transfer Hydrogenation of Nitroarenes with Formic Acid

Biomass Sucrose‐Derived Cobalt@Nitrogen‐Doped Carbon for Catalytic Transfer Hydrogenation of Nitroarenes with Formic Acid

Palladium‐Supported Nanoceria: A Highly Efficient Catalyst for Solvent‐Free Selective Oxidation of Ethylbenzene to Acetophenone

Photoreduction of a Pd-Doped Mesoporous TiO2 Photocatalyst for Hydrogen Production under Visible Light

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