PtAg bimetallic nanowires: Facile synthesis and their use as excellent electrocatalysts toward low-cost fuel cells

Cao, Xia; Wang, Ning; Han, Yu; Gao, Caizhen; Xu, Ying; Li, Meixian; Shao, Yuanhua

doi:10.1016/j.nanoen.2014.12.020

Cited by 117 publications

(70 citation statements)

References 56 publications

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“…So far, platinum (Pt) has been considered as one of the best catalysts and exclusively utilized in fuel cells23456, but they suffer from high cost and poor carbon monoxide (CO) tolerance8910. Alloying Pt with less expensive oxophilic metals ( M ) such as gold (Au), silver (Ag) and especially nonprecious 3d transition metals11121314 is an effective route to improve CO tolerance and catalytic activity of catalysts, owing to the synergistic and electronic structure alteration mechanism15161718192021222324. However, the dissolution of these metals remains the major reason for the severe degradation of the catalytic performance of these alloyed catalysts.…”

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confidence: 99%

Improved ethanol electrooxidation performance by shortening Pd–Ni active site distance in Pd–Ni–P nanocatalysts

et al. 2017

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Incorporating oxophilic metals into noble metal-based catalysts represents an emerging strategy to improve the catalytic performance of electrocatalysts in fuel cells. However, effects of the distance between the noble metal and oxophilic metal active sites on the catalytic performance have rarely been investigated. Herein, we report on ultrasmall (∼5 nm) Pd–Ni–P ternary nanoparticles for ethanol electrooxidation. The activity is improved up to 4.95 A per mgPd, which is 6.88 times higher than commercial Pd/C (0.72 A per mgPd), by shortening the distance between Pd and Ni active sites, achieved through shape transformation from Pd/Ni–P heterodimers into Pd–Ni–P nanoparticles and tuning the Ni/Pd atomic ratio to 1:1. Density functional theory calculations reveal that the improved activity and stability stems from the promoted production of free OH radicals (on Ni active sites) which facilitate the oxidative removal of carbonaceous poison and combination with CH3CO radicals on adjacent Pd active sites.

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confidence: 99%

Improved ethanol electrooxidation performance by shortening Pd–Ni active site distance in Pd–Ni–P nanocatalysts

et al. 2017

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“…However, practical applications of Pt are severely hindered because of high cost, and easy poisoning by intermediate products [6,7]. In hence, to enhance the electrocatalytic properties accordingly, binary electrocatalysts including Pt-Au and Pt-Ag, have been developed with the increase of d-band vacancy in Pt and more favorable PtPt inter-atomic distance [8][9][10][11][12]. Among which, Pd not only is less expensive than Pt, but also has high catalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic-assisted synthesis of Pd–Pt/carbon nanotubes nanocomposites for enhanced electro-oxidation of ethanol and methanol in alkaline medium

Yang

Zhou

Pan

et al. 2016

Ultrasonics Sonochemistry

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Herein, a facile ultrasonic-assisted strategy was proposed to fabricate the Pd-Pt alloy/multi-walled carbon nanotubes (Pd-Pt/CNTs) nanocomposites. A good number of Pd-Pt alloy nanoparticles with an average of 3.4 ± 0.5 nm were supported on sidewalls of CNTs with uniform distribution. The composition of the Pd-Pt/CNTs nanocomposites could also be easily controlled, which provided a possible approach for the preparation of other architectures with anticipated properties. The Pd-Pt/CNTs nanocomposites were extensively studied by electron microscopy, induced coupled plasma atomic emission spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy, and applied for the ethanol and methanol electro-oxidation reaction in alkaline medium. The electrochemical results indicated that the nanocomposites had better electrocatalytic activities and stabilities, showing promising applications for fuel cells.

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“…Generally, bimetallic nanocatalysts provide not only the access to additional handles for the structures, but also exhibit novel catalytic properties different from the constituent metals due to the strong electronic coupling [23][24][25]. The main aimed of our work is to improve electrocatalytic activity to H 2 O 2 by investigating more active and lower cost replacements to pure Pt.…”

Section: Introduction Hydrogen Peroxide (H 2 O 2 ) Is a Very Importanmentioning

confidence: 99%

Facile fabrication of Pt-Ag bimetallic nanoparticles decorated reduced graphene oxide for highly sensitive non-enzymatic hydrogen peroxide sensing

Zhang

et al. 2016

Talanta

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PtAg bimetallic nanowires: Facile synthesis and their use as excellent electrocatalysts toward low-cost fuel cells

Cited by 117 publications

References 56 publications

Improved ethanol electrooxidation performance by shortening Pd–Ni active site distance in Pd–Ni–P nanocatalysts

Improved ethanol electrooxidation performance by shortening Pd–Ni active site distance in Pd–Ni–P nanocatalysts

Ultrasonic-assisted synthesis of Pd–Pt/carbon nanotubes nanocomposites for enhanced electro-oxidation of ethanol and methanol in alkaline medium

Facile fabrication of Pt-Ag bimetallic nanoparticles decorated reduced graphene oxide for highly sensitive non-enzymatic hydrogen peroxide sensing

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