Pt–Co nanostructures electrodeposited on graphene nanosheets for methanol electrooxidation

Ojani, Reza; Raoof, Jahan Bakhsh; Goli, Mona; Valiollahi, Roudabeh

doi:10.1016/j.jpowsour.2014.03.147

Cited by 45 publications

(14 citation statements)

References 65 publications

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“…Until now, various physical and chemical synthesis methods of Pt-based alloy NPs have been surveyed, including incipient wetness19, wet impregnation202122, the polyol method23242526, electrochemical deposition272829, the colloidal method303132, and chemical vapor deposition (CVD)163334. However, these methods are subject to intrinsic drawbacks, such as (a) complicated multistep processes, including mixing, precipitation, and cleaning; (b) catalyst poisoning by chemical residues and lack of a “clean” surface; (c) strict conditions required for alloying; and (d) high vacuum sputtering and advanced patterning equipment, similar to the CVD process.…”

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confidence: 99%

Facile Fabrication of Platinum-Cobalt Alloy Nanoparticles with Enhanced Electrocatalytic Activity for a Methanol Oxidation Reaction

Huang

Zhang

et al. 2017

Sci Rep

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Decreasing the cost associated with platinum-based catalysts along with improving their catalytic properties is a major challenge for commercial direct methanol fuel cells. In this work, a simple and facile strategy was developed for the more efficient preparation of multi-walled carbon nanotube (MWCNT) -supported Pt/CoPt composite nanoparticles (NPs) via solution plasma sputtering with subsequent thermal annealing. Quite different from general wet synthesis methods, Pt/CoPt composite NPs were directly derived from metal wire electrodes without any additions. The obtained Pt/CoPt/MWCNTs composite catalysts exhibited tremendous improvement in the electro-oxidation of methanol in acidic media with mass activities of 1719 mA mg−1Pt. This value is much higher than that of previous reports of Pt-Co alloy and commercial Pt/C (3.16 times) because of the many active sites and clean surface of the catalysts. The catalysts showed good stability due to the special synergistic effects of the CoPt alloy. Pt/CoPt/MWCNTs can be used as a promising catalyst for direct methanol fuel cells. In addition, this solution plasma sputtering-assisted synthesis method introduces a general and feasible route for the synthesis of binary alloys.

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confidence: 99%

Facile Fabrication of Platinum-Cobalt Alloy Nanoparticles with Enhanced Electrocatalytic Activity for a Methanol Oxidation Reaction

Huang

Zhang

et al. 2017

Sci Rep

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“…Obviously, performance of the prepared catalysts, in terms of the current density and onset potential, improved by increasing the Pd deposition time up to 300 s. The catalyst electroactivity decreased with further increasing of the galvanic replacement reaction time. One possible explanation would be significant decrease in Pd surface area at longer times [49]. On the other hand, the peak current densities of the ethanol oxidation are dependent on active surface area of the deposited Pd.…”

Section: Optimization Of Galvanic Replacement Reaction Timementioning

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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“…[28] Reduced graphene oxide (RGO), a novel nano material with the composition of a honeycomb arrangement of carbon atoms, has been widely regarded as an excellent catalyst support in the field of materials science. [29][30][31] Until now, much attention has still been paid to RGO for the preparation of RGO-supported catalysts in DMFCs. [32][33][34] This ideal substrate is used in electrochemical field due to its unique electronic structures and outstanding properties, such as superior electronic conductivity, extremely high specific surface area, high stability and catalytic ability.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Electrocatalytic Activity of Dual Template Based Pt/Cu‐zeolite A/Graphene for Methanol Electrooxidation

Wang

et al. 2017

Chin. J. Chem.

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Cite this paper: Wang, S.; He, P.; He, M.; Dong, F.; Liu, H.; Lei, H.;Zhang, X.; He, S. Chin. J. Chem. 2018, 36, 37- ABSTRACT A novel Pt/Cu-zeolite A/graphene based electrocatalyst was successfully prepared by chemical reduction method for methanol electrooxidation. Graphite oxide and Cu functionalized zeolite A were simultaneously reduced by NaBH 4 to prepare Cu-zeolite A/graphene support which was used to deposit Pt nanoparticles. The nanostructure and composition of as-prepared Pt/Cu-zeolite A/graphene composites were characterized by X-ray diffractometer, X-ray fluorescence, Fourier transform infrared spectrometer and scanning electron microscopy. The electrocatalytic properties of Pt/Cu-zeolite A/graphene modified electrode for methanol oxidation were investigated by cyclic voltammetry and chronoamperometry in 0.10 mol/L H 2 SO 4 ＋0.50 mol/L CH 3 OH solution. Compared with Pt/zeolite A/graphene electrode and Pt/graphene electrode, Pt/Cu-zeolite A/graphene based electrode exhibited obviously enhanced current and higher electrocatalytic activity for methanol electrooxidation. The increased electrocatalytic activity was attributed to the presence of zeolite A and reduced graphene oxide based dual template, which significantly increased the effective electrode surface and facilitated the diffusion of analytes into the electroactive catalyst.

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Pt–Co nanostructures electrodeposited on graphene nanosheets for methanol electrooxidation

Cited by 45 publications

References 65 publications

Facile Fabrication of Platinum-Cobalt Alloy Nanoparticles with Enhanced Electrocatalytic Activity for a Methanol Oxidation Reaction

Facile Fabrication of Platinum-Cobalt Alloy Nanoparticles with Enhanced Electrocatalytic Activity for a Methanol Oxidation Reaction

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

Enhanced Electrocatalytic Activity of Dual Template Based Pt/Cu‐zeolite A/Graphene for Methanol Electrooxidation

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