Facile synthesis of porous 3D CoNiCu nano-network structure and their activity towards hydrogen evolution reaction

Wang, Chengsheng; Li, Wei; Lu, Xihong; Xie, Shilei; Xiao, Fangming; Liu, Peng; Tong, Yexiang

doi:10.1016/j.ijhydene.2012.09.149

Cited by 39 publications

(11 citation statements)

References 23 publications

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“…[171][172][173][174][175][176][177] Ir x Ru y Ta z O 2 as an anode electrocatalyst achieved an overall cell voltage of 1.57 V at 1 A cm −2 at 80 °C, with an energy consumption of 3.75 kWh N m −3 H 2 and efficiency of 94%, for a total noble metal loading of less than 2.04 mg cm −2 . 47 However, there are some non-noble, less expensive metals that also present electrocatalytic activity and are being introduced for use in oxygen [178][179][180][181][182][183][184][185] and hydrogen 165,166,[186][187][188][189][190][191] evolution reactions. Additionally, during designing an electrode, it is normally doped or coated with more stable and active layers.…”

Section: Future Trendsmentioning

confidence: 99%

Hydrogen production by alkaline water electrolysis

Santos¹,

Sequeira²,

Figueiredo³

2013

Quím. Nova

391

226

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Recebido em 13/12/12; aceito em 28/5/13; publicado na web em 17/7/13Water electrolysis is one of the simplest methods used for hydrogen production. It has the advantage of being able to produce hydrogen using only renewable energy. To expand the use of water electrolysis, it is mandatory to reduce energy consumption, cost, and maintenance of current electrolyzers, and, on the other hand, to increase their efficiency, durability, and safety. In this study, modern technologies for hydrogen production by water electrolysis have been investigated. In this article, the electrochemical fundamentals of alkaline water electrolysis are explained and the main process constraints (e.g., electrical, reaction, and transport) are analyzed. The historical background of water electrolysis is described, different technologies are compared, and main research needs for the development of water electrolysis technologies are discussed.

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Section: Future Trendsmentioning

confidence: 99%

Hydrogen production by alkaline water electrolysis

Santos¹,

Sequeira²,

Figueiredo³

2013

Quím. Nova

391

226

View full text Add to dashboard Cite

show abstract

“…11 To achieve a more active catalyst, one efficient way is to nanostructure the catalyst to signicantly increase the number of catalytically active sites. A variety of nano or nanoporous structured Ni-based catalysts have been developed to catalyze the HER, such as threedimensionally (3D) nanoporous Ni-Mo, 12 IrNiN nanoparticles, 13 nanoporous Ni lms, 14 NiSe nanobers, 15 3D CoNiCu nanonetworks, 16 Ni-Mo nanopowders, 17 and Ni 2 P nanoparticles. 18 Owing to their periodic pore structure, uniform pore size in the mesoscale regime, high surface area and high electrical conductivity, 19 ordered mesoporous metals have shown superior performances for applications in diverse elds, including catalysis, magnetics, adsorption, and energy conversion and storage.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensionally ordered macro-/mesoporous Ni as a highly efficient electrocatalyst for the hydrogen evolution reaction

et al. 2015

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“…The (111), (200), and (220) peaks belonging to cubic system of Co, Ni, and Cu are 44. The XRD pattern revealed that the ternary alloy deposited has a cubic crystalline structure since the peaks from the characteristic cubic planes of (111), (200), and (220) were observed at 2θ ≈ 44.0, 51.0, and 76.0, respectively, suggesting that the CuCoNi system is a solid solution [26,27]. In addition, the peaks located around 2θ ≈ (37.0, 42.0) and 55.0 are attributed to NiOx and Co(OH) 2 formation, respectively [27,28].…”

Section: Discussionmentioning

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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Facile synthesis of porous 3D CoNiCu nano-network structure and their activity towards hydrogen evolution reaction

Cited by 39 publications

References 23 publications

Hydrogen production by alkaline water electrolysis

Hydrogen production by alkaline water electrolysis

Three-dimensionally ordered macro-/mesoporous Ni as a highly efficient electrocatalyst for the hydrogen evolution reaction

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

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