Ni hollow spheres as catalysts for methanol and ethanol electrooxidation

Xu, Chen; Hu, Yaoping; Rong, Jian; Jiang, San Ping; Liu, Yingliang

doi:10.1016/j.elecom.2007.05.028

Cited by 118 publications

(36 citation statements)

References 28 publications

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“…Recently hollow nickel spheres have been used as catalysts for methanol and ethanol oxidation [6], and kinetic studies of ethanol oxidation on CuNi alloy supported PtRu and PtMo catalysts have also been investigated [7]. Nickel oxide/hydroxides and nickel-tetraazamacrocyclic complexes are known to be capable of catalyzing alcohol oxidation in an alkaline medium.…”

Section: Introductionmentioning

confidence: 99%

Nickel-dimethylglyoxime complex modified graphite and carbon paste electrodes: preparation and catalytic activity towards methanol/ethanol oxidation

et al. 2008

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Nickel-dimethylglyoxime complex (abbreviated as Ni(II)(DMG) 2 ) modified carbon paste and graphite electrodes were prepared by mixing Ni(II)(DMG) 2 with graphite paste, and coating Ni(II)(DMG) 2 to the graphite surface. It is necessary to cycle the electrode potential to a high value (e.g. 0.8 V versus SCE) for the preparation of the modified electrodes. The electrochemical reaction was originally assumed to be a one-electron process converting Ni(II)(DMG) 2 toNi(III)ONi(III)(OH)(DMG) 2 ] -showed a strong catalytic activity toward electro-oxidation of methanol and ethanol. The electrocatalytic oxidation currents consistently increase with the increase in Ni(II)(DMG) 2 loading, OH -, and alcohol concentrations. Rotating disk electrode results obtained with a Ni(II)(DMG) 2 coated graphite disk electrode showed that the electrocatalytic oxidation of alcohol is a 4-electron process producing formate anion (methanol oxidation) or acetate anion (ethanol oxidation). A mechanism for the electrocatalytic oxidation of methanol/ethanol was proposed, and a rate-determining step was also discussed.

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Section: Introductionmentioning

confidence: 99%

Nickel-dimethylglyoxime complex modified graphite and carbon paste electrodes: preparation and catalytic activity towards methanol/ethanol oxidation

et al. 2008

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“…In comparison with this report, the peak potential in our proposed electrode is about 450 mV smaller. Also there are some reports which have used modified carbon or GCE with nanocrystalline Ni [12], GCE with Ni [23], Ni films on GCE, GE and Ti [24], Ni hollow spheres [25] for methanol electro-oxidation. Although the proposed electrode in our study could not improve the oxidation potential or the current density, but the deposition potential is simpler and does not require any potentiostat or galvanostat.…”

Section: Xrd and Sem Analysismentioning

confidence: 98%

Ni nanoparticle modified graphite electrode for methanol electrocatalytic oxidation in alkaline media

2014

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Ni nanoparticles with an electroless procedure were deposited on the graphite rod, and the performance of the proposed electrode was evaluated for electrocatalytic oxidation of methanol in alkaline media. The structure and morphology of the electrode surface were examined with X-ray diffraction, energy dispersive X-ray analysis and scanning electron microscopy techniques. Voltammetric and amperometric studies indicated that the onset potential of the methanol oxidation is low (0.42 V) and the electrode stability is good. In addition to these advantages, due to ease of preparation and low cost, it can be used as an anode in methanol fuel cells.

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“…Due to their unique properties, these systems have promising applications in areas so disparate that span from catalysis to biomedicine [1][2][3][4][5][6][7]. In latter case, the inorganic shells are foreseen as carriers for drug or gene storage and/or controlled delivery [8].…”

Section: Introductionmentioning

confidence: 99%