Electrophoretic deposition of ZnCo2O4 spinel and its electrocatalytic properties for oxygen evolution reaction

Chi, Bo; Li, Jianbao; Yang, Xiaozhan; Lin, Hong; Wang, Ning

doi:10.1016/j.electacta.2004.09.014

Cited by 89 publications

(43 citation statements)

References 10 publications

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“…EPD was adopted to prepare the electrodes, as described elsewhere [16,17]. The suspension was prepared by adding 0.15 g of powder into ethanol (30 g, 99.86%), in addition to adding 0.0053 g of Co(NO 3 ) 2 to enhance the conductivity of the suspension.…”

Section: Methodsmentioning

confidence: 99%

“…films. [16][17][18] In general, the electrocatalytic activity of the oxide electrode depends on both electronic and geometric factors. The former are governed by the electronic structure and the nature of the active sites (such as Co 3þ in NiCo 2 O 4 [9,19,20] ), while the latter by the surface concentration of the active sites and by the extent of the actual surface area.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Core–Ring Structured NiCo₂O₄ Nanoplatelets: Synthesis, Characterization, and Electrocatalytic Applications

Cui

Lin

et al. 2008

Adv Funct Materials

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432

263

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An innovative nanostructure, namely the core–ring structure, is reported in this paper. It occurs in NiCo2O4 nanoplatelets, synthesized by the coprecipitation decomposition method using sodium hydroxide as the precipitant. The yield of core–ring hexagonal NiCo2O4 nanoplatelets is greater than 80% at 200 °C. A high‐resolution transmission electron microscopy and energy dispersive spectroscopy investigation reveals the typical core–ring nanostructure, which shows a strong enrichment of Co in the core with a Co content higher than 80%. A mechanism for the core–ring structure formation is proposed. The core–ring NiCo2O4 can be used as an electrocatalyst for an oxygen evolution reaction (OER) in alkaline water electrolysis. Compared with the electrodes of ordinary NiCo2O4 and Co3O4, or other NiCo2O4 electrodes prepared by alternate methods, the electrode coated by core‐ring NiCo2O4 nanoplatelets exhibits the greatest electrocatalytic properties, with an over‐potential of 0.315 V at a current density of 100 mA cm−2.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Core–Ring Structured NiCo₂O₄ Nanoplatelets: Synthesis, Characterization, and Electrocatalytic Applications

Cui

Lin

et al. 2008

Adv Funct Materials

Self Cite

432

263

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“…4), 5) Moreover, ZnCo 2 O 4 has shown a very high lithium storage capacity so it is being considered for next generation of anode materials in lithium ion batteries.…”

Section: Introductionmentioning

confidence: 99%

Thermal evolution of ZnCo2O4 spinel phase in air

Peiteado

Caballero

Makovec

2010

J. Ceram. Soc. Japan

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ZnCo 2 O 4 ceramics with a spinel-like structure are versatile functional materials which depending on the synthesis conditions may exhibit magnetic, electric, optical and/or catalytic characteristics. However under air atmosphere, cobalt ions experiment different red-ox processes with temperature, so contrary to many other spinel oxides, a low thermal stability can be expected for this cobaltite spinels. In addition, the final outcome of these transformations will be as well defined by the solid state chemistry of the ZnOCo x O y couple, i.e. by the partial solubility of cobalt in zinc oxide and zinc in the different cobalt oxides. At first the similarity in charge and ionic size suggests the possibility of substitutional solid solution for both the Co II into the ZnO wurtzite structure and the Zn II into the CoO rock-salt structure. However it has been observed that once the spinel structure collapses, all the zinc diffuses into the rock salt phase.

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“…With a spinel structure, NiCo 2 O 4 is, however, a semi-conductive material and exhibits p-type conductivity [9,10]. This material is therefore usually attached to an electrically conductive substrate (often metallic) through one of a number of methods to form a composite electrode [11].…”

Section: Introductionmentioning

confidence: 99%

“…This technique also allows significant flexibility in the choice of electrode shape. As a result of these and other advantages, EPD has been widely investigated for potential applications in the areas of structural and functional coatings, laminar composites and fuel cells [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

A novel preparation method for NiCo2O4 electrodes stacked with hexagonal nanosheets for water electrolysis

Yang

Lin

et al. 2006

J Appl Electrochem

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In this paper, we describe the preparation of a porous nanosheet-stacked NiCo 2 O 4 composite electrode using a novel electrophoretic deposition (EPD) calcination method. The effects of the deposition time and voltage, and of the calcination temperature have been investigated. The microstructure of the deposited films in the electrodes before and after calcination has also been investigated. The electrocatalytic properties of the electrodes have been investigated using cyclic voltammetry and polarization curves. The electrode films produced using this new technique have a porous structure composed of stacked hexagonal NiCo 2 O 4 nanosheets. The resulting electrodes exhibit good electrocatalytic properties for water electrolysis.

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Electrophoretic deposition of ZnCo2O4 spinel and its electrocatalytic properties for oxygen evolution reaction

Cited by 89 publications

References 10 publications

Core–Ring Structured NiCo₂O₄ Nanoplatelets: Synthesis, Characterization, and Electrocatalytic Applications

Core–Ring Structured NiCo₂O₄ Nanoplatelets: Synthesis, Characterization, and Electrocatalytic Applications

Thermal evolution of ZnCo2O4 spinel phase in air

A novel preparation method for NiCo2O4 electrodes stacked with hexagonal nanosheets for water electrolysis

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Electrophoretic deposition of ZnCo2O4 spinel and its electrocatalytic properties for oxygen evolution reaction

Cited by 89 publications

References 10 publications

Core–Ring Structured NiCo2O4 Nanoplatelets: Synthesis, Characterization, and Electrocatalytic Applications

Core–Ring Structured NiCo2O4 Nanoplatelets: Synthesis, Characterization, and Electrocatalytic Applications

Thermal evolution of ZnCo2O4 spinel phase in air

A novel preparation method for NiCo2O4 electrodes stacked with hexagonal nanosheets for water electrolysis

Contact Info

Product

Resources

About

Core–Ring Structured NiCo₂O₄ Nanoplatelets: Synthesis, Characterization, and Electrocatalytic Applications

Core–Ring Structured NiCo₂O₄ Nanoplatelets: Synthesis, Characterization, and Electrocatalytic Applications