Influence of Nitrogen doping on the Catalytic Activity of Ni-incorporated Carbon Nanofibers for Alkaline Direct Methanol Fuel Cells

Thamer, Badr M.; El‐Newehy, Mohamed H.; Barakat, Nasser A.M.; Abdelkareem, Mohammad Ali; Al‐Deyab, Salem S.; Kim, Hee Young

doi:10.1016/j.electacta.2014.07.053

Cited by 74 publications

(24 citation statements)

References 43 publications

(46 reference statements)

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“…Therefore, many efforts have recently been devoted to develop non-Pt materials for methanol oxidation such as Pd [8], Au [9], Ag [10] and Ni [11][12][13] catalysts. Among them, Ni catalyst shows relatively low cost, excellent electrochemical stability and resistance to poisoning, and its catalytic performance for methanol oxidation has been studied in alkaline medium since the 70's last century [14].…”

Section: Introductionmentioning

confidence: 99%

Nanoporous nickel-copper-phosphorus amorphous alloy film for methanol electro-oxidation in alkaline medium

Yuan

Zheng

Jia

et al. 2015

Electrochimica Acta

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Section: Introductionmentioning

confidence: 99%

Nanoporous nickel-copper-phosphorus amorphous alloy film for methanol electro-oxidation in alkaline medium

Yuan

Zheng

Jia

et al. 2015

Electrochimica Acta

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“…The oxidation potential decreases with increase in methanol concentration from 0.3 M to 0.5 M due to enhanced diffusion of intermediate species promoted by oxygen containing functional groups in rGO nanosheets . At 0.7 M concentration of methanol, the oxidation potential becomes more positive due to formation of organic intermediates that can be oxidized only at higher potential . The oxidation peak splits into two peaks at 1 M concentration.…”

Section: Resultsmentioning

confidence: 99%

Electrocatalytic Acitivity of rGO/PEDOT : PSS Nanocomposite towards Methanol Oxidation in Alkaline Media

Baruah

Kumar

2018

Electroanalysis

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Increasing demand of alternative energy sources leads to the development of new electrocatalytic materials for fuel cells. In present work, we report the synthesis of rGO/PEDOT : PSS (reduced graphene oxide/ Poly (3,4‐ethylenedioxythiophene) : Polystyrene sulfonate) nanocomposite by in‐situ polymerization method using EDOT as precursor and the nanocomposite is used as anode catalyst for methanol oxidation. Structural and chemical characterizations such as XRD, FTIR and Micro‐Raman confirm the formation of the nanocomposite. From TEM image, growth of nanofibrous PEDOT : PSS on rGO nanosheets is observed. Electrochemical characterizations of rGO/PEDOT : PSS/ITO electrode are performed by Cyclic Voltammetry (CV), Electrochemical Impedance Spectroscopy (EIS) and Chronoamperometry (CA) measurements. Methanol oxidation reactions are performed in 0.5 M NaOH solution. The anodic current of the nanocomposite coated ITO is found be 37.5 mA at 0.59 V due to methanol electro‐oxidation and retentivity of the electrode is 92 % of initial scan after 800 cycles. The chronoamperometric results reveal that the nanocomposite modified electrode exhibits better stability with retention factor of 42.4 % up to 3000 seconds. The rGO/PEDOT : PSS/ITO electrode exhibits enhanced electrocatalytic activity towards methanol oxidation reaction due to larger surface area and excellent conductivity of rGO nanosheet.

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“…This layer is used to initiate the electrochemical activity. 4,18 Fig. 4 displays CV behavior of NiCuCNFs in 1 M KOH.…”

Section: Resultsmentioning

confidence: 99%

Electrospun NiCu Nanoalloy Decorated on Carbon Nanofibers as Chemical Stable Electrocatalyst for Methanol Oxidation

Yousef

Brooks

Abdelkareem

et al. 2015

ECS Electrochemistry Letters

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NiCu-carbon nanofibers (CNFs) composite was introduced as electrocatalyst for methanol oxidation. Nanofibers (NFs) were synthesized by calcination of electrospun nanofiber mats composed of nickel (II) acetate tetrahydrate, Copper (II) acetate monohydrate, and polyvinyl alcohol (PVA) in the argon/hydrogen atmosphere at 700 • C for 2 hr. The introduced NFs showed a very good ectrocatalytic activity for methanol oxidation as compared tothat of Ni nanoparticles (NPs) and NiCNFs. As the current densities ∼110 mA/Cm 2 , 85 mA/Cm 2 , and 60 mA/Cm 2 for NiCuCNFs nanocomposite, NiCNFs, and Ni NPs, respectively, were obtained.Energy, like water is one of the most important daily needs for the human beings to survive. New energy source draws immediate attention as the conventional energy sources deplete. Direct alcohol fuel cells (DAFCs) are believed a promised candidates for energy producing devices. 1 Among of them, direct methanol fuel cells (DMFCs) are very attractive due to their low cost, performance at the room temperature, and use liquid methanol as fuel. Moreover, methanol has a high energy density enabling it to be easily stored and distributed. 2,3 In DMFCs, aqueous methanol is electrooxidized to carbon dioxide and water on the surface of highly active anode consisting of precious platinum-based materials. 4 However, they face a major challenge in commercialization of the fuel cells due to their highly cost. 5 Moreover, they are poisoned by the adsorption of CO or CHO species that form during the methanol oxidation. 2 Thus, huge effort has been expended to replace Pt-based materials. Recently, transition metals due to their low cost and ease of preparation are used as alternatives for precious metals in DMFCs. Especially, the use of bimetallic nanoalloy for catalytic chemical reaction has been thought to be useful owing to the formation of new properties dissimilar from monometallic. 6,7 Generally, alloy nanomaterials have featured binding properties with reactants in contrary to those of monometallic metal catalysts. 7 Among alloy nanomaterials, nickel copper nanoalloy has been used in electrooxidation of alcohols and other organics. 8,9 However, nude nanoalloy suffers from corrosion during methanol electrooxidation.Electrooxidtion of methanol is a combination of electrochemical reaction and adsorption of reactants on the anode surface. Carbon nanostructures with ordered graphite-like structure have been incorporated in many recently reported as electrocatalytic materials in fuel cells Due to their high adsorption capacity, electrical properties, chemical stability and corrosion resistance. 2,4,10 Accordingly, covering NiCu nanoalloy with nano-carbon might be enhancing corrosion resistance and methanol electrooxidation. Among nanostructures, NFs have been extensively applied in a wide variety of applications ranging from catalysts and photocatalysts to biological and medical application. As compared to nanoparticles, nanofibers have a large axial ratio that faciles electrons transfer, an important factor in elec...

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Influence of Nitrogen doping on the Catalytic Activity of Ni-incorporated Carbon Nanofibers for Alkaline Direct Methanol Fuel Cells

Cited by 74 publications

References 43 publications

Nanoporous nickel-copper-phosphorus amorphous alloy film for methanol electro-oxidation in alkaline medium

Nanoporous nickel-copper-phosphorus amorphous alloy film for methanol electro-oxidation in alkaline medium

Electrocatalytic Acitivity of rGO/PEDOT : PSS Nanocomposite towards Methanol Oxidation in Alkaline Media

Electrospun NiCu Nanoalloy Decorated on Carbon Nanofibers as Chemical Stable Electrocatalyst for Methanol Oxidation

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