Electrocatalytic oxidation of glucose on Ni and NiCu alloy modified glassy carbon electrode

Jafarian, M.; Forouzandeh, Farisa; Danaee, I.; Gobal, F.; Mahjani, M.G.

doi:10.1007/s10008-008-0632-1

Cited by 144 publications

(79 citation statements)

References 44 publications

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“…In the case of Ni, peaks at +0.4 V in a forward line (oxidation) and at +0.34 V in a backward line (reduction) were present, which correspond to the Ni(II)-Ni(III) redox couple involving NiOOH. 20 The oxidation peak for NiCu alloys was shifted to a higher position (+0.43 V) than that for pure Ni, implying the complex behaviors of NiOOH formation on NiCu alloys. In the case of Cu, no sign of redox peaks relevant to the oxide/ hydroxide was observed, of which the reason was discussed in the next paragraph in combination with the glucose oxidation.…”

Section: Methodsmentioning

confidence: 92%

“…19 Jafarian et al produced a Ni 79 Cu 21 alloy by galvanostatic deposition on glassy carbon for glucose oxidation. 20 The glucose oxidation tests showed that the alloy had a higher catalytic activity than pure Ni; this explained that glucose oxidation occurred during the oxidation of Ni(OH) 2 , which produced β-NiOOH and γ-NiOOH, and that the higher activity of NiCu alloys was due to the prohibition of γ-NiOOH formation, which could expand and compromise the template, leading to a decrease in catalytic activity. 20 However, a systematic study on the effects of alloy compositions on the catalytic activity of glucose oxidation is rare.…”

Section: 17mentioning

confidence: 99%

“…20 The glucose oxidation tests showed that the alloy had a higher catalytic activity than pure Ni; this explained that glucose oxidation occurred during the oxidation of Ni(OH) 2 , which produced β-NiOOH and γ-NiOOH, and that the higher activity of NiCu alloys was due to the prohibition of γ-NiOOH formation, which could expand and compromise the template, leading to a decrease in catalytic activity. 20 However, a systematic study on the effects of alloy compositions on the catalytic activity of glucose oxidation is rare. Previously, we reported that the modification of a Cu electrode by displacement with Au increased the catalytic activity and lessened the poisoning of catalysts by intermediates during glucose oxidation.…”

Section: 17mentioning

confidence: 99%

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Electrodeposited NiCu Alloy Catalysts for Glucose Oxidation

Lim¹,

Ahn²,

Hyun³

et al. 2014

Bulletin of the Korean Chemical Society

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NiCu alloys have been suggested as potential candidates for catalysts in glucose oxidation. In this study, NiCu alloys with different compositions were prepared on a glassy carbon substrate by changing the electrodeposition potential to examine the effect of Ni/Cu ratios in alloys on catalytic activity toward glucose oxidation. Cyclic voltammetry and chronoamperometry showed that NiCu alloys had higher catalytic activity than pure Ni and Cu catalysts. Especially, Ni59Cu41 had superior catalytic activity, which was about twice that of Ni at a given oxidation potential. X-ray analyses showed that the oxidation state of Ni in NiCu alloys was increased with the content of Cu by lattice expansion. Ni components in alloys with higher oxidation state were more effective in the oxidation of glucose.

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Section: Methodsmentioning

confidence: 92%

Section: 17mentioning

confidence: 99%

Section: 17mentioning

confidence: 99%

See 1 more Smart Citation

Electrodeposited NiCu Alloy Catalysts for Glucose Oxidation

Lim¹,

Ahn²,

Hyun³

et al. 2014

Bulletin of the Korean Chemical Society

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“…Interestingly, by addressing the electrocatalytic activity of the tertiary metal oxide CuCoNiOx@CNTs/GCE (curve e), significant features appear. The first feature is that the oxidation current increased dramatically in comparison to the mono-metal oxides (curves a, b, and c); this could be attributed to the synergism between the three metal oxides that resulted in enrichment of the surface with Ni(III), mentioned in Equation (5), which reflects the higher oxidation current in the forward scan according to the proposed mechanism in the above-mentioned equations, in addition to the fact that the presence of CuOx with NiOx in the same alloy enhanced the generation and stabilization of the β-NiOOH phase, the pioneer phase in the alcohol oxidation process in alkaline medium [18]. Furthermore, the higher produced oxidation current may be because of the fact that the three metals coexist in the same alloy and act as active sites for the methanol oxidation simultaneously.…”

Section: Methanol Electrocatalytic Oxidation At the Modified Electrodesmentioning

confidence: 99%

High Electrocatalytic Performance of CuCoNi@CNTs Modified Glassy Carbon Electrode towards Methanol Oxidation in Alkaline Medium

et al. 2017

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Abstract:A novel non-precious multiwalled carbon nanotubes (CNTs)-supported metal oxide electrocatalyst was developed for methanol electrooxidation in alkaline medium. The catalyst was fabricated by simultaneous electrodeposition of copper-cobalt-nickel ternary nanostructures (CuCoNi) on a glassy carbon electrode (GCE) modified with CNTs. The proposed electrode was characterized using X-ray diffraction (XRD), energy dispersive X-ray (EDX), and scanning electron microscopy (SEM). The electrochemical behavior and the electrocatalytic performance of the suggested electrode towards the oxidation of methanol were evaluated by cyclic voltammetry (CV), linear sweep voltammetry (LSV), and chronoamperometry (CA) in alkaline medium. Several parameters were investigated, e.g., deposition time, potential scan rate, etc. Compared to Cu, Co, or Ni mono electrocatalysts, the electrode based on ternary-metals exhibited superior electrocatalytic activity and stability towards methanol electrooxidation. For instance, CuCoNi@CNTs/GCE has shown at least 2.5 times electrocatalytic activity and stability compared to the mono eletrocatalysts. Moreover, the present study found that the optimized loading level is 1500 s of simultaneous electrodeposition. At this loading level, it was found that the relation between the I p /ν 1/2 function and scan rate gives the characteristic features of a catalytic process. The enhanced activity and stability of CuCoNi@CNTs/GCE was attributed to (i) a synergism between three metal oxides coexisting in the same structure; (ii) the presence of CNTs as a support for the metal oxides, that offers high surface area for the deposited tertiary alloy and suppresses the aggregation and sintering of the metals oxide with time; as well as (iii) the increase of the conductivity of the deposited semiconducting metal oxides.

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“…近年来, 关于镍及其化合物电极用于葡萄糖电催化氧化成为人们研究的重点领域. 如 Yousef Elahi 等 [12] 用姜黄素改性镍玻碳电极; Qiu 等 [13] 制备出树枝状铜镍合金电极; Jafarian 等 [14] 在玻碳电极上恒电流沉积镍和铜镍合金电极; Zheng 等 [15] 制备了镍离子和槲皮素复合改性碳纳米管离子液体糊状电极; Ganesh 等 [16] 在 ITO 电极上沉积氢氧化镍; Chekin 等 [17] 合成了镍/聚丙烯腈和碳纳米管复合改性电极; Chen 等 [18] 在泡沫镍上沉积银纳米粒子制备了泡沫银/镍电极; Galindo 等 [19] 用电化学方法合成铁酸镍电极; Danaee 等 [20] 通过恒电流法沉积镍修饰玻碳电极; El-Refaei 等 [21] 采用锰镍的复合氧化物改性玻碳电极. 尽管这些镍基催化剂对葡萄糖的电催化氧化呈现一定的活性和抗毒化能力, 但低表面积的载体限制其电催化活性.…”

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