FePt nanoalloys anchored reduced graphene oxide as high-performance electrocatalysts for formic acid and methanol oxidation

Guo, Jinxue; Sun, Yanfang; Zhang, Xinqun; Tang, Lin; Liu, Hongtian

doi:10.1016/j.jallcom.2014.03.077

Cited by 25 publications

(21 citation statements)

References 37 publications

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“…The electrochemical measurements showed that the Pt-SiO 2 /G-2 had the highest value of ECSA and performs best as compare to the other catalysts for the electrooxidation of methanol. It FePt/RGO ---2.26 - [12] has been concluded that for this catalyst, methanol electrooxidation was improved by 4.2 times and the stability of this catalyst also improved by 1.64 times as compare to the Pt/G catalysts [15]. PtCo/MWCNT and PtCo-EG catalysts were successfully synthesized by using solution-phase reduction method.…”

Section: Table I Electrochemical Properties Of Various Electrocatalystsmentioning

confidence: 90%

“…Similarly for comparison 6mL (GO) solution is mixed with 60 mL (H2PtCl6).3H2O solution.After this ultrasonication is performed for 30 min and stirring is performed at 80ºC. After this calcination is performed at 120ºC in H2/Ar atmosphere to obtain the final product (Pt/RGO) [12].…”

Section: Synthesis Of Materialsmentioning

confidence: 99%

“…Pt/RGO and Fe-Pt/RGO has been synthesized and concluded that Fe-Pt/RGO shows higher value of I F /I R ratio, which means that Fe-Pt/RGO have better electrocatalytic activity as compare to the Pt/RGO [12].…”

Section: Table I Electrochemical Properties Of Various Electrocatalystsmentioning

confidence: 99%

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Graphene based Electrocatalysts for DMFCs

2016

3rd International Conference on Innovative Engineering Technologies (ICIET'2016) August 5-6, 2016 Bangkok (Thailand)

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Abstract---Fuel cell is a device that generates electricity by a chemical reaction. Recently carbon black was commonly used as a support for fuel cells but their properties were not satisfactory for the better electrocatalytic activity and stability. In the recent years graphene is introduced as a carbon support that can replace the carbon black because it provides better resistance towards corrosion, high surface area, high mechanical strength, high conductivity and potential low manufacturing cost. Commonly platinum based electrode materials were used in DMFCs, but high cost of platinum limited the commercialization of DMFCs. In this paper graphene supported Pt-based materials and graphene supported non-Pt metals are compared. Electrocatalytic activity of the electro-catalysts was compared through the comparison of I F /I R ratio and charge transfer resistance (R ct ) obtained from the cyclic voltammetry.

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Section: Table I Electrochemical Properties Of Various Electrocatalystsmentioning

confidence: 90%

Section: Synthesis Of Materialsmentioning

confidence: 99%

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Graphene based Electrocatalysts for DMFCs

2016

3rd International Conference on Innovative Engineering Technologies (ICIET'2016) August 5-6, 2016 Bangkok (Thailand)

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“…However, the monometal Pt catalyst is not only expensive, but also easily poisoned by the adsorption of CO-like intermediate species, reducing the electrocatalytic activity of the catalyst during methanol oxidation [2]. Binary or ternary Pt-based catalysts containing other transition metals, such as NiAuPt [3], PtRu [4], PtCu [5], FePt [6], PtSn [7], PtCo [8], PtRhNi [9], or PtPd [10] can evidently improve the performance in catalyzing MOR compared with the monometallic Pt catalysts. Particularly, they can alleviate CO ads poisoning and expose more Pt active sites, resulting in lower noble metal dosages and lower costs.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Bimetallic Pt-Ag/Graphene Composite and Its Electro-Photo-Synergistic Catalytic Properties for Methanol Oxidation

et al. 2016

Catalysts

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A Pt-Ag/graphene composite (Pt-Ag/GNs) was synthesized by the facile aqueous solution method, in which Ag + was first transformed into Ag 2 O under UV light irradiation, and then Ag 2 O, Pt 2+ , and graphene oxide (GO) were simultaneously reduced by formic acid. It was found that Pt-Ag bimetallic nanoparticles were highly dispersed on the surface of graphene, and their size distribution was narrow with an average diameter of 3.3 nm. Electrocatalytic properties of the Pt-Ag/GNs composite were investigated by cyclic voltammograms (CVs), chronoamperometry (CA), CO-stripping voltammograms, and electrochemical impedance spectrum (EIS) techniques. It was shown that the Pt-Ag/GNs composite has much higher catalytic activity and stability for the methanol oxidation reaction (MOR) and better tolerance toward CO poisoning when compared with Pt/GNs and the commercially available Johnson Matthey 20% Pt/C catalyst (Pt/C-JM). Furthermore, the Pt-Ag/GNs composite showed efficient electro-photo-synergistic catalysis for MOR under UV or visible light irradiation. Particularly in the presence of UV irradiation, the Pt-Ag/GNs composite exhibited an ultrahigh mass activity of 1842.4 mA·mg −1 , nearly 2.0 times higher than that without light irradiation (838.3 mA·mg −1 ).

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“…1 At present, a state-ofart fuel cell requires 0.5 mg Pt per cm 2 electrode area. [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] Demonstrated by the literatures, the addition of transition metals into Ptbased alloy catalysts can not only promote its electrocatalytic activity, but also improve the tolerance to CO poison. 3 In order to decrease the usage amount of Pt and promote the commercialization of Pt-based fuel cells, the Pt-based catalysts with enhanced catalytic activities are being desired to be achieved.…”

Section: Introductionmentioning

confidence: 99%

PtFe/nitrogen-doped graphene for high-performance electrooxidation of formic acid with composition sensitive electrocatalytic activity

et al. 2015

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With the aim to pursue novel high-performance electrocatalysts for fuel cell, a simple synthesis strategy, which consists of hydrothermal reaction followed by solid state reduction by H2, is developed to prepare a series of PtxFe100-x/N-doped graphene nanocomposites with controllable Pt:Fe compositions. The morphology, microstructure, and composition of the samples are systematically characterized with transmission electron microscope, scanning electron microscope, energy dispersive spectroscopy, powder X-ray diffraction, X-ray photoelectron spectroscopy and Raman spectroscopy. The effects of nitrogen doping and alloying with Fe, as well as their synergistic interaction, on the improvement of catalytic performance are well revealed using the present samples as catalysts for formic acid electrooxidation. Additionally, the composition sensitive catalytic activity and stability of these catalysts for formic acid electrooxidation are probed and the optimum Pt:Fe ratio is presented. The optimum sample possesses both the enhanced electrochemical performances and the reduced dosage of noble metal, making it a promising candidate for fuel cell applications.

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FePt nanoalloys anchored reduced graphene oxide as high-performance electrocatalysts for formic acid and methanol oxidation

Cited by 25 publications

References 37 publications

Graphene based Electrocatalysts for DMFCs

Graphene based Electrocatalysts for DMFCs

Facile Synthesis of Bimetallic Pt-Ag/Graphene Composite and Its Electro-Photo-Synergistic Catalytic Properties for Methanol Oxidation

PtFe/nitrogen-doped graphene for high-performance electrooxidation of formic acid with composition sensitive electrocatalytic activity

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