Carbon nanofibers doped by Ni x Co 1−x alloy nanoparticles as effective and stable non precious electrocatalyst for methanol oxidation in alkaline media

We prepared bimetallic PdxFey alloy nanoparticles/carbon nanofiber composites with different Pd/Fe mole ratios and showed their advantage as a potential anode catalyst in ethanol fuel cells.

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Influence of Sn content on the electrocatalytic activity of NiSn alloy nanoparticles-incorporated carbon nanofibers toward methanol oxidation

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2018.09.196 ◽

2018 ◽

Vol 43 (46) ◽

pp. 21333-21344 ◽

Cited By ~ 8

Author(s):

Nasser A.M. Barakat ◽

Fahad S. Al-Mubaddel ◽

Mohammad Rezual Karim ◽

Maher Alrashed ◽

Hak Yong Kim

Keyword(s):

Carbon Nanofibers ◽

Methanol Oxidation ◽

Electrocatalytic Activity ◽

Alloy Nanoparticles

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Cobalt/Chromium Nanoparticles-Incorporated Carbon Nanofibers as Effective Nonprecious Catalyst for Methanol Electrooxidation in Alkaline Medium

NANO ◽

10.1142/s1793292016500491 ◽

2016 ◽

Vol 11 (05) ◽

pp. 1650049 ◽

Cited By ~ 17

Author(s):

Ibrahim M. A. Mohamed ◽

Moaaed Motlak ◽

H. Fouad ◽

Nasser A. M. Barakat

Keyword(s):

Electron Microscope ◽

Scanning Electron Microscope ◽

Carbon Nanofibers ◽

Methanol Oxidation ◽

Current Density ◽

Methanol Electrooxidation ◽

Alkaline Media ◽

Poly Vinyl Alcohol ◽

Cobalt Chromium ◽

Scanning Electron

Cobalt-Chrome nanoparticles-incorporated carbon nanofibers (CNFs) are proposed as an effective nonprecious electrocatalyst for methanol oxidation in the alkaline media. The introduced nanofibers were prepared by simple technique, electrospinning. Carbonization of as-spun mat composed of chromium acetate, cobalt acetate and poly(vinyl alcohol) (PVA) at high temperature (900[Formula: see text]C) leads to production of the introduced nanofibers. The physicochemical characteristics were investigated by X-ray diffractometer (XRD), scanning electron microscope (SEM), field emission scanning electron microscope (FESEM), transmission electron microscope (TEM) equipped with EDX and TEM mapping. The exploited analyses confirmed that the final product is in the form of CNFs decorated by Co/Cr nanoparticles. Based on the results obtained from the cyclic voltammetry (CV) measurements, the proposed Co/Cr-incorporated CNFs possess high electrocatalytic activity toward methanol electrooxidation as a clear peak of methanol oxidation appeared with corresponding current density of 56[Formula: see text]mA/cm2. Moreover, the current density increased by increasing methanol concentration up to 4.0[Formula: see text]M. Overall, the proposed nanofibers open new avenue for platinum-free and stable nanostructural catalysts for fuel cell technology.

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Mn-Mo-O Catalysts for Methanol Oxidation. I. Preparation and Characterization of the Catalysts

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19922529 ◽

1992 ◽

Vol 57 (12) ◽

pp. 2529-2538 ◽

Cited By ~ 3

Author(s):

Krasimir Ivanov ◽

Penka Litcheva ◽

Dimitar Klissurski

Keyword(s):

Methanol Oxidation ◽

Solution Concentration ◽

Alkaline Media ◽

Acidic Media ◽

Chemical Methods ◽

X Ray ◽

Ph Values ◽

Precipitate Composition

Mn-Mo-O catalysts with a different Mo/Mn ratio have been prepared by precipitation. The precipitate composition as a function of solution concentration and pH was studied by X-ray, IR, thermal and chemical methods. Formation of manganese molybdates with MnMoO4.1.5H2O, Mn3Mo3O12.2.5H2O, and Mn3Mo4O15.4H2O composition has been supposed. It is concluded that pure MnMoO4 may be obtained in both acid and alkaline media, the pH values depending on the concentration of the initial solutions. The maximum Mo/Mn ratio in the precipitates is 1.33. The formation of pure Mn3Mo4O15.4H2O is possible in weakly acidic media. This process is favoured by increasing the concentration of initial solutions.

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