Pd-Au/C catalysts with different alloying degrees for ethanol oxidation in alkaline media

Qin, Yuan-Hang; Li, Yunfeng; Lv, Renliang; Wang, Tielin; Wang, Weiguo; Wang, Cunwen

doi:10.1016/j.electacta.2014.08.078

Cited by 47 publications

(26 citation statements)

References 28 publications

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“…Although the Pal-NH 2 -supported Au 48 Pd 52 alloy nano-catalysts also exhibited four peaks at 2θ of 39.3°, 45.5°, 65.8° and 79.5°, these peaks lay between monometallic Au and Pd peaks. Thus, we could demonstrate that Pd and Au atoms had penetrated into each other’s mutual lattice and formed a AuPd bimetallic alloy structure [36,37].…”

Section: Resultsmentioning

confidence: 99%

Palygorskite Supported AuPd Alloy Nanoparticles as Efficient Nano-Catalysts for the Reduction of Nitroarenes and Dyes at Room Temperature

Guo

Jia

et al. 2018

Nanomaterials

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In this work, AuPd alloy palygorskite based Pal-NH2@AuPd nano-catalysts were prepared and used as catalysts for the reduction of nitroarenes and dyes at room temperature. The surface of palygorskite (Pal) was first modified with 3-aminpropyltriethoxysilane, and then covered with AuPd alloy nanoparticles through co-reduction of HAuCl4 and K2PdCl4. The morphology and structures of the Pal-NH2@AuPd nano-catalysts were characterized by X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS) and transmission electron microscopy (TEM). The as-synthesized Pal-NH2@AuPd nano-catalysts displayed excellent catalytic performance in reducing 4-nitrophenol (4-NP) and various other nitroaromatic compounds. Moreover, the catalytic activities of the Pal-NH2@AuPd nano-catalysts were adjustable via changing the atomic ratio of AuPd alloy nanoparticles, leading to the Pal-NH2@Au48Pd52 component as having the best atomic ratio. The Pal-NH2@Au48Pd52 continued to display good catalytic stability after being reused for several cycles and there were no obvious changes, either of the morphology or the particle size distribution of the nano-catalysts. Furthermore, these Pal-NH2@Au48Pd52 nano-catalysts also provided a convenient and accessible way for the degradation of dyes in artificial industrial wastewater.

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Section: Resultsmentioning

confidence: 99%

Palygorskite Supported AuPd Alloy Nanoparticles as Efficient Nano-Catalysts for the Reduction of Nitroarenes and Dyes at Room Temperature

Guo

Jia

et al. 2018

Nanomaterials

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“…This is the case, for instance, of Pd adlayers deposited on Au substrates. Au-Pd surfaces are catalytic to several reactions, including the electro-oxidation of formic acid, 13 ethanol, 6,14 and glycerol. [3][4][5]7,15,16 However, the relationship between the surface structure and reactivity is not totally understood, despite it is known that the activity of Au-Pd surfaces depends on the deposit thickness and the substrate structure as well as the electronic and geometric effects.…”

Section: Introductionmentioning

confidence: 99%

“…[3][4][5]7,15,16 However, the relationship between the surface structure and reactivity is not totally understood, despite it is known that the activity of Au-Pd surfaces depends on the deposit thickness and the substrate structure as well as the electronic and geometric effects. 14,15,17,18 In this sense, the stability of Pd-Au adlayers has been tested by Kibler et al, [19][20][21] depositing palladium on gold single crystal electrodes with a well-known surface structure. Using Scanning Tunneling Microscopy (STM), the epitaxial growth of palladium in the gold basal planes is observed.…”

Section: Introductionmentioning

confidence: 99%

Glycerol electrooxidation on Pd modified Au surfaces in alkaline media: Effect of the deposition method

Mello

Busó-Rogero

Herrero

et al. 2018

The Journal of Chemical Physics

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The catalytic effect of Pd on gold electrodes for glycerol oxidation is evaluated for Pd-Au surfaces prepared using three different methods: irreversible adsorption of palladium by a simple immersion of a gold electrode in palladium solution, the deposition of palladium on the gold substrate by a step potential from 1 to 0.75 V, and the forced deposition of palladium on the gold electrode with the help of a reducing hydrogen atmosphere. Voltammetry has been used for the electrochemical characterization of the Pd-Au deposits and to determine its reactivity towards glycerol oxidation, whereas FTIR experiments have allowed detecting adsorbed species and products formed during the oxidation reaction. Pd-Au surfaces prepared by irreversible adsorption are the electrodes that show the highest activity for the glycerol complete oxidation to carbonate, whereas Pd-Au surfaces made by the step potential are the catalyst that exhibits the highest rate for the formation and adsorption CO before carbonate production, poisoning the surface and diminishing their electrocatalytic properties. In addition to carbonate, glycerate, glycolate, and formate are detected as oxidation products. The integrated bands of the spectra are used to give quantitative information for comparing the product distribution of the different Pd-Au deposits prepared.

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“…For example; Pd-based catalysts decorated with some metal oxides (CeO 2 , Y 2 O 3 , Al 2 O 3 , TiO 2 , MgO, In 2 O 3 ) have been designed to increase the catalyst electroactivity and stability in ethanol oxidation [12e15]. Pd-based binary catalysts such as Au [16,17], Ni [18,19], Pt [20], Bi [21], Ag [22], Cu [23] and Pd-based ternary catalysts [24e27] have been investigated by several researchers. It has been found that PdeCo alloys have excellent electrocatalytic performance in comparison with pure Pd catalyst [28,29], and Co is much cheaper than precious metals such as Ag, Au and Pt.…”

Section: Introductionmentioning

confidence: 99%

Investigation on ethanol electrooxidation via electrodeposited Pd–Co nanostructures supported on graphene oxide

Rostami

Omrani

2015

International Journal of Hydrogen Energy

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Pd-Au/C catalysts with different alloying degrees for ethanol oxidation in alkaline media

Cited by 47 publications

References 28 publications

Palygorskite Supported AuPd Alloy Nanoparticles as Efficient Nano-Catalysts for the Reduction of Nitroarenes and Dyes at Room Temperature

Palygorskite Supported AuPd Alloy Nanoparticles as Efficient Nano-Catalysts for the Reduction of Nitroarenes and Dyes at Room Temperature

Glycerol electrooxidation on Pd modified Au surfaces in alkaline media: Effect of the deposition method

Investigation on ethanol electrooxidation via electrodeposited Pd–Co nanostructures supported on graphene oxide

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