Interwoven heterostructural Co<sub>3</sub>O<sub>4</sub>–carbon@FeOOH hollow polyhedrons with improved electrochemical performance

Xu, Wangwang; Xie, Zhiqiang; Wang, Zi; Dietrich, G.; Wang, Ying

doi:10.1039/c6ta08217c

Cited by 24 publications

(13 citation statements)

References 38 publications

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“…The same authorsa lso reported crystalline Co 3 O 4 -carbon@amorphousF eOOHi nterwoven hollow polyhedrons synthesized through thermalt reatment of ZIF-67 in air,f ollowed by solution-phase growth of amorphous FeOOH. [63] Interestingly,i nt his synthesis, well-defined Co 3 O 4carbon hollow polyhedrons serve as ag rowth platform for the growth of amorphous FeOOH nanowires. As we can see from Figure 2, numerous Co 3 O 4 hollow polyhedrons are interconnectedb yF eOOH nanowires.…”

Section: Mof-derived Tmos For Libsmentioning

confidence: 99%

Recent Progress in Metal–Organic Frameworks and Their Derived Nanostructures for Energy and Environmental Applications

et al. 2017

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Metal-organic frameworks (MOFs), as a very promising category of porous materials, have attracted increasing interest from research communities due to their extremely high surface areas, diverse nanostructures, and unique properties. In recent years, there is a growing body of evidence to indicate that MOFs can function as ideal templates to prepare various nanostructured materials for energy and environmental cleaning applications. Recent progress in the design and synthesis of MOFs and MOF-derived nanomaterials for particular applications in lithium-ion batteries, sodium-ion batteries, supercapacitors, dye-sensitized solar cells, and heavy-metal-ion detection and removal is reviewed herein. In addition, the remaining major challenges in the above fields are discussed and some perspectives for future research efforts in the development of MOFs are also provided.

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Section: Mof-derived Tmos For Libsmentioning

confidence: 99%

Recent Progress in Metal–Organic Frameworks and Their Derived Nanostructures for Energy and Environmental Applications

et al. 2017

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“…The crystal structures of the as‐obtained ZIF‐67 polyhedrons, Ni‐doped CoS 2 and pristine CoS 2 are first identified by X‐ray diffraction (XRD) analysis. As seen from Figure a, the XRD pattern of ZIF‐67 displays major peaks from (011), (002), (112) and (222) planes, which are well consistent with other publications ,. It is also found that the Ni 2+ incorporated ZIF‐67 (denoted as CoNi‐MOF) displays the identical XRD pattern with pure ZIF‐67, which is likely due to the very low amount of Ni dopant in the sample.…”

Section: Resultsmentioning

confidence: 91%

MOF‐Derived Ni‐Doped CoS₂ Grown on Carbon Fiber Paper for Efficient Oxygen Evolution Reaction

2019

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The efficiency of water splitting for clean production of hydrogen energy is largely limited by the sluggish kinetics of the oxygen evolution reaction (OER). Thus, it is of great significance but still remains challenging to develop stable, efficient, and economical catalysts that could provide a high current density at a low overpotential. In this work, we report an economical synthesis of metal organic framework (MOF) derived Ni-doped CoS 2 , grown on carbon fiber paper (Ni-doped CoS 2 /CFP), as a new OER catalyst with high catalytic activity and durability. The binder-free Ni-doped CoS 2 /CFP electrode exhibits a very low overpotential of 270 mV (versus RHE) at 10 mA cm À 2 , a Tafel slope of 79 mV dec À 1 , and high durability during 3000 cyclic voltammetry sweeps. Such a remarkable OER performance exceeds that of most of noble-metal-free materials and even commercial IrO 2 . The significantly improved OER performance is largely ascribed to the synergic effects of Ni doping and the conductive CFP catalyst support, leading to an enhanced electron and mass transfer during the OER process. We believe that the as-prepared Ni-doped CoS 2 /CFP material holds great promise as an economical OER electrocatalyst for energyrelated applications.

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“…To investigate the effect of oxygen vacancies on the growth of Fe 2– y Co y O 3 nanowires, we also prepared Co 3 O 4 @amorphous FeOOH nanowires by dispersing pure Co 3 O 4 without oxygen vacancies into an aqueous solution of ferrous sulfate for 20 h (the experimental procedure is described in detail in the Supporting Information). As we can see in Figures S13 and S14, without oxygen vacancies to serve as heterogeneous nucleation sites, FeOOH grows into amorphous nanowires via self-assembly, hydrolysis of Fe 3+ , and oxolation of FeO 6 units …”

Section: Resultsmentioning

confidence: 99%

“…Co 3 O 4 -carbon hollow polyhedrons (30 mg) were dispersed in deionized water (30 mL). FeSO 4 ·7H 2 O (0.242 g) was added, and the solution was kept stirring for 20 h. Afterward, the resultant products were collected by centrifugation, washed with water and ethanol several times, and dried overnight at 70 °C …”

Section: Experimental Sectionmentioning

confidence: 99%

Co₃O_4–x-Carbon@Fe_2–yCo_yO₃ Heterostructural Hollow Polyhedrons for the Oxygen Evolution Reaction

Xie

Wang

2017

ACS Appl. Mater. Interfaces

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Hollow heterostructured nanomaterials have received tremendous interest in new-generation electrocatalyst applications. However, the design and fabrication of such materials remain a significant challenge. In this work, we present CoO-carbon@FeCoO heterostructural hollow polyhedrons that have been fabricated by facile thermal treatment followed by solution-phase growth for application as efficient oxygen evolution reaction (OER) electrocatalysts. Starting from a single ZIF-67 hollow polyhedron, a novel complex structured composite material constructed from CoO nanocrystallite-embedded carbon matrix embedded with FeCoO nanowires was successfully prepared. The CoO nanocrystallite with oxygen vacancies provides both heterogeneous nucleation sites and growth platform for FeCoO nanowires. The resultant heterostructure combines the advantages of FeCoO nanowires with the large surface area and surface defects of CoO nanocrystallite, resulting in improved electrocatalytic activity and electrical conductivity. As a result, such novel heterostructured OER electrocatalysts exhibit much lower onset potential (1.52 V) and higher current density (70 mA/cm at 1.7 V) than CoO-carbon hollow polyhedrons (onset 1.55 V, 35 mA/cm at 1.7 V) and pure CoO hollow polyhedrons (onset 1.62 V, 5 mA/cm at 1.7 V). Furthermore, the design and synthesis of metal-organic framework (MOF)-derived nanomaterials in this work offer new opportunities for developing novel and efficient electrocatalysts in electrochemical devices.

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Interwoven heterostructural Co₃O₄–carbon@FeOOH hollow polyhedrons with improved electrochemical performance

Abstract: This work displays well-defined Co3O4–carbon hollow polyhedrons that can serve as a growth platform for amorphous FeOOH nanowires, forming interwoven hollow polyhedrons that exhibit improved reversibility and high capacity as anode material for lithium ion batteries.

Cited by 24 publications

References 38 publications

Recent Progress in Metal–Organic Frameworks and Their Derived Nanostructures for Energy and Environmental Applications

Recent Progress in Metal–Organic Frameworks and Their Derived Nanostructures for Energy and Environmental Applications

MOF‐Derived Ni‐Doped CoS₂ Grown on Carbon Fiber Paper for Efficient Oxygen Evolution Reaction

Co₃O_4–x-Carbon@Fe_2–yCo_yO₃ Heterostructural Hollow Polyhedrons for the Oxygen Evolution Reaction

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Interwoven heterostructural Co3O4–carbon@FeOOH hollow polyhedrons with improved electrochemical performance

Abstract: This work displays well-defined Co3O4–carbon hollow polyhedrons that can serve as a growth platform for amorphous FeOOH nanowires, forming interwoven hollow polyhedrons that exhibit improved reversibility and high capacity as anode material for lithium ion batteries.

Cited by 24 publications

References 38 publications

Recent Progress in Metal–Organic Frameworks and Their Derived Nanostructures for Energy and Environmental Applications

Recent Progress in Metal–Organic Frameworks and Their Derived Nanostructures for Energy and Environmental Applications

MOF‐Derived Ni‐Doped CoS2 Grown on Carbon Fiber Paper for Efficient Oxygen Evolution Reaction

Co3O4–x-Carbon@Fe2–yCoyO3 Heterostructural Hollow Polyhedrons for the Oxygen Evolution Reaction

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Interwoven heterostructural Co₃O₄–carbon@FeOOH hollow polyhedrons with improved electrochemical performance

MOF‐Derived Ni‐Doped CoS₂ Grown on Carbon Fiber Paper for Efficient Oxygen Evolution Reaction

Co₃O_4–x-Carbon@Fe_2–yCo_yO₃ Heterostructural Hollow Polyhedrons for the Oxygen Evolution Reaction