Amphoteric surfactant promoted three-dimensional assembly of graphene micro/nanoclusters to accomodate Pt nanoparticles for methanol oxidation

Wang, Zonghua; Shi, Guoyu; Zhang, Feifei; Xia, Jianfei; Gui, Rijun; Yang, Min; Bi, Sai; Xia, Lin; Li, Yanhui; Xia, Linhua; Xia, Yanzhi

doi:10.1016/j.electacta.2015.02.009

Cited by 39 publications

(24 citation statements)

References 27 publications

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“…In the case of the graphene-Pt NP hybrid, the onset potential for methanol oxidation was observed to be located at 0.40 V, and the oxidation forward and reverse peaks of methanol were located at 0.87 and 0.66 V, respectively. The graphene-Pt NP hybrid exhibited a forward peak current (jF H2SO4 on Table 1) of 1141 A g -1 , which is similar to the highest values that have been reported for RGO-Pt NP catalysts [52][53][54]58,63,64], and it was higher than those achieved using pristine graphene as support [31][32][33] and comparable to those achieved using bi-and tri-metallic NPs over pristine graphene [29]. The forward oxidation current to reverse current ratio (IF/IB on Table 1) describes the catalyst tolerance to CO-like intermediates that are formed on the surface of the catalyst during the forward CV sweep [10].…”

Section: Electrocatalytic Activity Of the Graphene-metal Np Hybrids Tsupporting

confidence: 71%

“…Current retentions of 23, 5 and 2 % were measured after 30 min for the graphene-Pt NP, graphene-Pd NP(1) and graphene-Pd NP(2) catalysts, respectively. The specific current retained by the graphene-Pt NP hybrid after 30 minutes was in most cases higher than or at least amongst the highest of those recorded for similar catalysts reported in the literature [54,63,64]. However, it is important to note that most of the mentioned graphene-Pt NP catalytic stability tests were conducted in acidic media.…”

Section: Electrocatalytic Activity Of the Graphene-metal Np Hybrids Tmentioning

confidence: 62%

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Efficient Pt electrocatalysts supported onto flavin mononucleotide–exfoliated pristine graphene for the methanol oxidation reaction

Ayán-Varela

Ruiz-Rosas

Villar–Rodil

et al. 2017

Electrochimica Acta

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Due to its large surface area, high electrical conductivity as well as mechanical and thermal stability, pristine graphene has the potential to be an excellent support for metal nanoparticles (NPs), but the scarce amount of intrinsic chemical groups/defects in its structure that could act as anchoring sites for the NPs hinders this type of use. Here, a simple strategy based on the stabilization of pristine graphene in aqueous dispersion with the assistance of a low amount of flavin mononucleotide (FMN) is shown to yield a material that combines high electrical conductivity and abundance of extrinsic anchoring sites, so that pristine graphene-metal (Pd and Pt) NP hybrids with good dispersion and metal loading can be obtained from FMN-stabilized graphene. The activity of these hybrids towards the methanol oxidation reaction (MOR) both in acidic and alkaline media is studied by cyclic voltammetry (CV) and their stability investigated by chronoamperometry. The pristine graphene-Pt NP hybrid prepared by this simple, eco-friendly protocol is demonstrated to outperform most previously reported pristine graphene-and reduced graphene oxide-metal NP hybrids as electrocatalyst for the MOR, both in terms of catalytic activity and stability, avoiding at the same time the use of harsh chemicals or complex synthetic routes.

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Section: Electrocatalytic Activity Of the Graphene-metal Np Hybrids Tsupporting

confidence: 71%

Section: Electrocatalytic Activity Of the Graphene-metal Np Hybrids Tmentioning

confidence: 62%

Efficient Pt electrocatalysts supported onto flavin mononucleotide–exfoliated pristine graphene for the methanol oxidation reaction

Ayán-Varela

Ruiz-Rosas

Villar–Rodil

et al. 2017

Electrochimica Acta

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“…2A and Fig. The D/G intensity ratio increases from GO to 3DGN, which is due to the defects introduced into the 3DGN during reduction 50,51 . The Raman spectra of GO and 3DGN were shown in Fig.…”

Section: Resultsmentioning

confidence: 92%

Electrodeposition of PtNi bimetallic nanoparticles on three-dimensional graphene for highly efficient methanol oxidation

et al. 2015

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In the present work, platinum-nickel (PtNi) bimetallic nanoparticles with a uniform diameter of 40 nm were anchored onto a three-dimensional graphene (3DGN) by using the method of electrodeposition. The resulting PtNi/3DGN composites were developed toward highly active catalysts for methanol oxidation. Experimental results revealed that the PtNi/3DGN composites exhibited improved electrocatalytic capacity (the forward anodic peak current density of 822.1 mA/mgPt in methanol oxidation when compared with Pt alone (251.2 mA/mgPt) and Pt/3DGN (416.9 mA/mgPt), and indicated the high tolerance to carbon monoxide generated in the process of methanol oxidation.

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“…Furthermore, as-prepared graphene by this way usually shows poor dispersibility in aqueous solution due to agglomerate irreversibly through van der Waals interactions [24]. In view of these aspects, the methods of developing eco-friendly, simple operation and easy to disperse graphene are expected to create more opportunity for biological sensing applications [25]. Fortunately, researches found that using poly(diallyldimethylammonium chloride) (PDDA), a positively charged polyelectrolyte being used as the dispersing agent and stabilizer, was conducive to obtain the hydrosoluble graphene sheets [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Construction of a highly sensitive NADH sensing platform based on PDDA-rGO nanocomposite modified electrode

Yue-lin

Liu

et al. 2016

Ionics

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In this article, we constructed an electrochemical sensor for highly sensitive determination of β-nicotinamide adenine dinucleotide (NADH) using the poly(diallyldimethylammonium chloride)-functionalized reduced graphene oxide nanocomposite modified electrode (PDDA-rGO/GCE). The nanocomposite was characterized by transmission electron microscopy, Fourier transform-infrared spectrometry, ultraviolet-visible absorption spectrometry, cyclic voltammetry, and electrochemical impedance spectroscopy. The experimental results demonstrated that the fabricated sensor exhibited excellent electrocatalytic activity on the oxidation of NADH with a decreased about 200 mV in overpotential and 5.0-fold increment in the oxidation peak current compared to a bare GCE. Applying cyclic voltammetry, a wide linear range from 1.0 × 10 −7 to 2.9 × 10 −3 M with low limit of detection (LOD) of 3.4 × 10 −8 M and high sensitivity of 463.3 μA mM −1 cm −2 were obtained, which was superior to other NADH electrochemical sensors reported previously. Furthermore, the fabricated NADH sensor possessed excellent selectivity, reproducibility, and stability. The oxidation mechanism of NADH at the PDDA-rGO/GCE was also discussed in detail.

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Amphoteric surfactant promoted three-dimensional assembly of graphene micro/nanoclusters to accomodate Pt nanoparticles for methanol oxidation

Cited by 39 publications

References 27 publications

Efficient Pt electrocatalysts supported onto flavin mononucleotide–exfoliated pristine graphene for the methanol oxidation reaction

Efficient Pt electrocatalysts supported onto flavin mononucleotide–exfoliated pristine graphene for the methanol oxidation reaction

Electrodeposition of PtNi bimetallic nanoparticles on three-dimensional graphene for highly efficient methanol oxidation

Construction of a highly sensitive NADH sensing platform based on PDDA-rGO nanocomposite modified electrode

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