Nickel foam supported mesoporous NiCo<sub>2</sub>O<sub>4</sub> arrays with excellent methanol electro-oxidation performance

Wang, Wei; Chu, Qingxin; Zhang, Yingnan; Zhu, Wei; Wang, Xiaofeng; Liu, Xiaoyang

doi:10.1039/c5nj00766f

Cited by 62 publications

(37 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure illustrates the typical CV curves of the synthesized electrocatalysts in 1 M KOH solution in the absence of methanol, potential range from 0 to 0.7 V at a scan rate of 10 mV s −1 . A pair of broad redox peaks is evident in the anodic and cathodic sweeps indicating the presence of Ni 2+ /Ni 3+ and Co 2+ /Co 3+ solid state redox couples in the nickel cobaltite . This may be due to NiCo 2 O 4 is a mixed valence oxide.…”

Section: Resultsmentioning

confidence: 94%

Mesoporous NiCo₂O₄ Micro/nanospheres with Hierarchical Structures for Supercapacitors and Methanol Electro–oxidation

Zhang

Ren

et al. 2017

ChemElectroChem

View full text Add to dashboard Cite

Mesoporous NiCo2O4 materials with different 3D structures, including flower‐like hierarchical structures (NCO‐flower‐like HSs), nanoflake@nanoneedle‐like multiple hierarchical structures (NCO‐MHS) and urchin‐like hierarchical structures (NCO‐urchin‐like HSs), were prepared by using a facile, one‐step, NH4F‐induced hydrothermal method followed by thermal annealing. The physicochemical characterization of the as‐prepared materials was investigated by means of X‐ray diffraction, scanning electron microscopy, transmission electron microscopy, and X‐ray photoelectron spectroscopy. The performance of the synthesized NiCo2O4 material as supercapacitor electrode materials was measured and the results demonstrate that the NCO‐MHSs and NCO‐urchin‐like HSs exhibit high specific capacitance values of 640 and 655 F ⋅ g−1 at a current density of 1 A ⋅ g−1, whereas the capacitance retention is 99.6 and 95 %, respectively, after 1000 cycles at a current density of 5 A ⋅ g−1. The electrocatalytic performance of synthetized NiCo2O4 for methanol electro‐oxidation was evaluated in 1 M KOH electrolyte. The NCO‐MHSs and NCO‐urchin‐like HSs deliver an electro‐oxidation current density of 51 and 48.5 A ⋅ g−1, respectively, at 0.65 V with excellent stability. The results indicate that the hierarchical structure of NiCo2O4 offers a promising electrode material for supercapacitors and methanol electro‐oxidation.

show abstract

Section: Resultsmentioning

confidence: 94%

Mesoporous NiCo₂O₄ Micro/nanospheres with Hierarchical Structures for Supercapacitors and Methanol Electro–oxidation

Zhang

Ren

et al. 2017

ChemElectroChem

View full text Add to dashboard Cite

show abstract

“…4) Searching for alternative low‐cost transition‐metal oxides or hydroxides (such as NiO, Co 3 O 4 , CoO, NiCo 2 O 4 , Ni(OH) 2 , and Co(OH) 2 , etc. based catalysts . Moreover, it is well known that the support materials will also have a large impact on the MOR performance of catalysts.…”

Section: Direct Methanol Fuel Cellsmentioning

confidence: 99%

“…3) NiCo 2 O 4 has increased redox activity in contrast to single‐metal oxides such as NiO and Co 3 O 4 , in which Ni and Co are both active sites for redox reaction . In another work done by Liu and co‐workers, a mesoporous NiCo 2 O 4 nanocloth arrays supported on Ni foam was directly prepared by a mild and adjustable hydrothermal method and applied to methanol electro‐oxidation . This NiCo 2 O 4 nanocloth array electrode shows higher catalytic performance for MOR in an alkaline medium compared with NiCo 2 O 4 in another form of nanosheet arrays, which could be attributed to more adequate open spaces and shorter ion diffusion paths to facilitate rapid ionic transportation of its nanocloth array structure.…”

Section: Direct Methanol Fuel Cellsmentioning

confidence: 99%

Design and Application of Foams for Electrocatalysis

et al. 2017

View full text Add to dashboard Cite

Developing low cost and efficient anode and cathode materials toward electrocatalysis are regarded as one of the most desirable yet challenging research directions, which are intimately related to the pressing energy, environmental and human health issues. Currently, 3 D foam (such as Ni foam, Cu foam, and graphene foam) based heterogeneous catalysts have been intensively explored for actively catalyzing the electrode reactions. Their inherent characteristics of stereo‐network structure, high specific area and large pore volume not only provide better mass transport of reactants to electrode surfaces, but also pave 3 D electron transport pathways. Herein, recent significant progress and rational design of foam‐based electrocatalysts are reviewed. In addition, some insights into current challenges and future directions of foams for efficient electrocatalysis are proposed and discussed.

show abstract

“…Meanwhile, spinel (AB 2 O 4 ) type TTMOs (e.g. NiCo 2 O 4 , NiFe 2 O 4 , and CoMn 2 O 4 ) have been widely investigated for electrochemical capacitor applications. TTMOs have extremely high theoretical capacitance (≈3000 F g −1 ) because the mass transportation, ion diffusion, and electron transfer have all been promoted.…”

Section: Introductionmentioning

confidence: 99%

One‐Step Controllable Synthesis of Mesoporous MgCo₂O₄ Nanosheet Arrays with Ethanol on Nickel Foam as an Advanced Electrode Material for High‐Performance Supercapacitors

Teng

Zhang

et al. 2018

Chemistry A European J

Self Cite

View full text Add to dashboard Cite

In recent years, ternary transition metal oxides (TTMOs), especially spinel type TTMOs have attracted widespread attention as promising candidates for electrode materials. Among all of the popular TTMOs, MgCo O is an outstanding one, owing to its superior theoretical capacitance. In this work, MgCo O nanosheet arrays (NSAs) grown directly on nickel foams were fabricated through a facile hydrothermal process at 120 °C for 4 h. With a series of structural and morphological characterization techniques, it was found that the ethanol played a key role in controlling the composition and morphology during the synthesis process. The MgCo O NSAs exhibited a superior specific capacitance of 853.06 C g (at 1 mA cm ) and enhanced cycling performance, with 94.65 % of initial capacitance retained after 3000 cycles when used as a binder-free integrated electrode for electrochemical supercapacitors; much higher than other reported data for MgCo O as well. The excellent electrochemical properties mainly came from the unique morphology of the MgCo O NSAs. This study will demonstrate the applications of MgCo O NSAs based large-scale supercapacitors grown on low-cost nickel foams.

show abstract

Nickel foam supported mesoporous NiCo₂O₄ arrays with excellent methanol electro-oxidation performance

Abstract: Schematic of the electro-oxidation reaction process of NiCo2O4 nanocloth arrays on nickel foam. The unique morphological features can afford efficient 3D electron transport during the redox reaction.

Cited by 62 publications

References 40 publications

Mesoporous NiCo₂O₄ Micro/nanospheres with Hierarchical Structures for Supercapacitors and Methanol Electro–oxidation

Mesoporous NiCo₂O₄ Micro/nanospheres with Hierarchical Structures for Supercapacitors and Methanol Electro–oxidation

Design and Application of Foams for Electrocatalysis

One‐Step Controllable Synthesis of Mesoporous MgCo₂O₄ Nanosheet Arrays with Ethanol on Nickel Foam as an Advanced Electrode Material for High‐Performance Supercapacitors

Contact Info

Product

Resources

About

Nickel foam supported mesoporous NiCo2O4 arrays with excellent methanol electro-oxidation performance

Abstract: Schematic of the electro-oxidation reaction process of NiCo2O4 nanocloth arrays on nickel foam. The unique morphological features can afford efficient 3D electron transport during the redox reaction.

Cited by 62 publications

References 40 publications

Mesoporous NiCo2O4 Micro/nanospheres with Hierarchical Structures for Supercapacitors and Methanol Electro–oxidation

Mesoporous NiCo2O4 Micro/nanospheres with Hierarchical Structures for Supercapacitors and Methanol Electro–oxidation

Design and Application of Foams for Electrocatalysis

One‐Step Controllable Synthesis of Mesoporous MgCo2O4 Nanosheet Arrays with Ethanol on Nickel Foam as an Advanced Electrode Material for High‐Performance Supercapacitors

Contact Info

Product

Resources

About

Nickel foam supported mesoporous NiCo₂O₄ arrays with excellent methanol electro-oxidation performance

Mesoporous NiCo₂O₄ Micro/nanospheres with Hierarchical Structures for Supercapacitors and Methanol Electro–oxidation

Mesoporous NiCo₂O₄ Micro/nanospheres with Hierarchical Structures for Supercapacitors and Methanol Electro–oxidation

One‐Step Controllable Synthesis of Mesoporous MgCo₂O₄ Nanosheet Arrays with Ethanol on Nickel Foam as an Advanced Electrode Material for High‐Performance Supercapacitors