Applications of bimetallic PdCu catalysts

Khosravi, Faezeh; Afrasi, Mahmoud; Sansano, José M.; Nájera, Carmén

doi:10.1039/d0cy02339f

Cited by 59 publications

(40 citation statements)

References 332 publications

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“…Typically, GVL can be obtained through hydrogenation and subsequent cyclization of levulinic acid (LA) . Many types of monometals, such as Ir, Au, Pt, Re, Pd, Rh, Ru, Ni, Mo, Co, Fe, and Cu, supported on various supports including activated carbon (AC), carbon nanotube (CNT), ordered mesoporous carbon (OMC), SiO 2 , Al 2 O 3 , TiO 2 , ZrO 2 , and zeolites, have been studied as catalysts for this purpose. − Except for monometallic catalysts, more and more heterogeneous bimetallic catalysts have also been developed for the hydrodeoxygenation of LA into GVL in the past few decades. − Although the catalytic mechanism of bimetallic catalysts is far from clear, it is widely believed that the addition of the second metal will form heteroatom bonds that change the electronic environment of the metal surface. Thus, the microgeometry of the metal lattice is altered, which would bring synergistic effects during the catalytic reactions.…”

Section: Introductionmentioning

confidence: 99%

Low Loading of CoRe/TiO₂ for Efficient Hydrodeoxygenation of Levulinic Acid to γ-Valerolactone

Wei

Cheng

et al. 2021

ACS Sustainable Chem. Eng.

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CoRe bimetallic catalysts with low loading were designed for hydrodeoxygenation of levulinic acid to γvalerolactone. Results show that the 1 wt % Co 0.5 Re 0.5 /TiO 2 catalyst achieved the highest yield of γ-valerolactone (>99%) at 220 °C, 3 h, a 1,4-dioxane solvent and Co/levulinic acid molar ratio of 1:1760, with a turnover frequency (TOF) of 1328 h −1 . The catalyst can be reused four times with only slight activity loss. The catalyst was characterized with various physicochemical measurements, and its adsorption styles with H 2 and levulinic acid were calculated by density functional theory. The results reveal that four main factors are related to its excellent catalytic performance. First, the Re oxides synergize with Co by spillover of the dissociated H atoms, which increases the apparent dispersion of Co and promotes the reaction. Second, the low loading of 1 wt % allowed the metal nanoparticles to be well dispersed with a very fine size of ca. 1.24 nm, which may expose more active sites to the substrate and result in a higher catalytic efficiency. Third, CoRe formed an amorphous alloy with the formula Co-ReO 1.6 , which showed a synergistic effect during the reaction. Finally, the TiO 2 support was nonporous and hydrophilic, which would be beneficial for the mass diffusion of the reaction components to be adsorbed/desorbed onto the vicinity of the metallic active sites and lead to a high TOF in the hydrodeoxygenation process.

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Section: Introductionmentioning

confidence: 99%

Low Loading of CoRe/TiO₂ for Efficient Hydrodeoxygenation of Levulinic Acid to γ-Valerolactone

Wei

Cheng

et al. 2021

ACS Sustainable Chem. Eng.

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“…These disadvantages mean that it is necessary to prepare low-cost, highly active, and more stable catalysts. To achieve this goal, ideal nanoelectrocatalysts should be highly conducive to facilitating the transfer of electrons/ions and possess a high active surface to increase the catalytic efficiency of desired nanocatalysts in the DHzHPFC community [22,23]. Alloying noble metals with cheap transition metals is well-known as one way to decrease the content of noble metals.…”

Section: Introductionmentioning

confidence: 99%

Palladium-Nickel Electrocatalysts on Nitrogen-Doped Reduced Graphene Oxide Nanosheets for Direct Hydrazine/Hydrogen Peroxide Fuel Cells

et al. 2021

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In the present work, nitrogen-doped reduced graphene oxide-supported (NrGO) bimetallic Pd–Ni nanoparticles (NPs), fabricated by means of the electrochemical reduction method, are investigated as an anode electrocatalyst in direct hydrazine–hydrogen peroxide fuel cells (DHzHPFCs). The surface and structural characterization of the synthesized catalyst affirm the uniform deposition of NPs on the distorted NrGO. The electrochemical studies indicate that the hydrazine oxidation current density on Pd–Ni/NrGO is 1.81 times higher than that of Pd/NrGO. The onset potential of hydrazine oxidation on the bimetallic catalyst is also slightly more negative, i.e., the catalyst activity and stability are improved by Ni incorporation into the Pd network. Moreover, the Pd–Ni/NrGO catalyst has a large electrochemical surface area, a low activation energy value and a low resistance of charge transfer. Finally, a systematic investigation of DHzHPFC with Pd–Ni/NrGO as an anode and Pt/C as a cathode is performed; the open circuit voltage of 1.80 V and a supreme power density of 216.71 mW cm−2 is obtained for the synthesized catalyst at 60 °C. These results show that the Pd–Ni/NrGO nanocatalyst has great potential to serve as an effective and stable catalyst with low Pd content for application in DHzHPFCs.

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“…57 A combination of copper and palladium offers an interesting mixture recently studied for selective oxidation reactions of cyclopentene, cyclohexane and benzene . 58 Supported Pd-Cu bimetallic nanocatalysts were used for the oxygenation of cyclopentene to cyclopentanone with selectivity over 95%. 59 Palladium-copper salt is known for Wacker oxidation of cyclohexene.…”

Section: Faraday Discussion Accepted Manuscriptmentioning

confidence: 99%

Oxidative dehydrogenation of cyclohexene on atomically precise subnanometer Cu_4−nPd_n (0 ≤ n ≤ 4) tetramer clusters: the effect of cluster composition and support on performance

et al. 2023

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Applications of bimetallic PdCu catalysts

Abstract: Bimetallic PdCu nanoparticles can be applied as catalyst in a wide range of chemical and electrochemical reactions. This review article overviews the preparation and synthetic applications of these bimetallic nanoparticles...

Cited by 59 publications

References 332 publications

Low Loading of CoRe/TiO₂ for Efficient Hydrodeoxygenation of Levulinic Acid to γ-Valerolactone

Low Loading of CoRe/TiO₂ for Efficient Hydrodeoxygenation of Levulinic Acid to γ-Valerolactone

Palladium-Nickel Electrocatalysts on Nitrogen-Doped Reduced Graphene Oxide Nanosheets for Direct Hydrazine/Hydrogen Peroxide Fuel Cells

Oxidative dehydrogenation of cyclohexene on atomically precise subnanometer Cu_4−nPd_n (0 ≤ n ≤ 4) tetramer clusters: the effect of cluster composition and support on performance

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Applications of bimetallic PdCu catalysts

Abstract: Bimetallic PdCu nanoparticles can be applied as catalyst in a wide range of chemical and electrochemical reactions. This review article overviews the preparation and synthetic applications of these bimetallic nanoparticles...

Cited by 59 publications

References 332 publications

Low Loading of CoRe/TiO2 for Efficient Hydrodeoxygenation of Levulinic Acid to γ-Valerolactone

Low Loading of CoRe/TiO2 for Efficient Hydrodeoxygenation of Levulinic Acid to γ-Valerolactone

Palladium-Nickel Electrocatalysts on Nitrogen-Doped Reduced Graphene Oxide Nanosheets for Direct Hydrazine/Hydrogen Peroxide Fuel Cells

Oxidative dehydrogenation of cyclohexene on atomically precise subnanometer Cu4−nPdn (0 ≤ n ≤ 4) tetramer clusters: the effect of cluster composition and support on performance

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Low Loading of CoRe/TiO₂ for Efficient Hydrodeoxygenation of Levulinic Acid to γ-Valerolactone

Low Loading of CoRe/TiO₂ for Efficient Hydrodeoxygenation of Levulinic Acid to γ-Valerolactone

Oxidative dehydrogenation of cyclohexene on atomically precise subnanometer Cu_4−nPd_n (0 ≤ n ≤ 4) tetramer clusters: the effect of cluster composition and support on performance