Prussian blue analogue metal organic framework-derived CoSe2 nanoboxes for highly efficient oxygen evolution reaction

Ganesan, Vinoth; Kim, Jinkwon

doi:10.1016/j.matlet.2018.03.125

Cited by 39 publications

(13 citation statements)

References 16 publications

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“…The structural inhomogeneity of the MOF crystals generally originates from the density of metal-ligand bonds along different crystallographic orientations [70] and the uneven distribution of defects. [71,125,126] The anisotropy of the crystal structure leads to different chemical compositions of exposed vertices, edges, and crystal facets. The crystallographic surface featuring a high density of coordination bonds will be preferentially etched.…”

Section: Selective Chemical Etchingmentioning

confidence: 99%

“…[125] Similarly, Co-PBA nanoboxes are obtained by etching the cube-shaped crystals of Co-PBA with ammonia. [126] Using the structural inhomogeneity to etching is a facile method; however, for most MOF crystals, their structures and compositions are homogenous. Another feasible method is the surface protection induced etching, which involves shielding the coordination bonds on the surface of MOF crystals with a layer of stabilizing agents to prevent the corrosion of the surface.…”

Section: Selective Chemical Etchingmentioning

confidence: 99%

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Hollow Functional Materials Derived from Metal–Organic Frameworks: Synthetic Strategies, Conversion Mechanisms, and Electrochemical Applications

et al. 2019

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Hollow materials derived from metal-organic frameworks (MOFs), by virtue of their controllable configuration, composition, porosity, and specific surface area, have shown fascinating physicochemical properties and widespread applications, especially in electrochemical energy storage and conversion. Here, the recent advances in the controllable synthesis are discussed, mainly focusing on the conversion mechanisms from MOFs to hollow-structured materials. The synthetic strategies of MOF-derived hollow-structured materials are broadly sorted into two categories: the controllable synthesis of hollow MOFs and subsequent pyrolysis into functional materials, and the controllable conversion of solid MOFs with predesigned composition and morphology into hollow structures. Based on the formation processes of hollow MOFs and the conversion processes of solid MOFs, the synthetic strategies are further conceptually grouped into six categories: template-mediated assembly, stepped dissolution-regrowth, selective chemical etching, interfacial ion exchange, heterogeneous construction, and self-catalytic pyrolysis. By analyzing and discussing fourteen types of reaction processes in detail, a systematic mechanism of conversion from MOFs to hollow-structured materials is exhibited. Afterward, the applications of these hollow structures as electrode materials for lithium-ion batteries, hybrid supercapacitors, and electrocatalysis are presented. Finally, an outlook on the emergent challenges and future developments in terms of their controllable fabrications and electrochemical applications is further discussed.

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Section: Selective Chemical Etchingmentioning

confidence: 99%

Section: Selective Chemical Etchingmentioning

confidence: 99%

Hollow Functional Materials Derived from Metal–Organic Frameworks: Synthetic Strategies, Conversion Mechanisms, and Electrochemical Applications

et al. 2019

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“…All materials maintained more stable discharging–charging performance than Pt/C + Ir/C in a ZAB. Kim and co‐workers [ 267 ] etched Co‐PBA in NH 3 /H 2 O, followed by inert pyrolysis in the presence of Se powder to obtain CoSe 2 nanoboxes, which delivered an OER overpotential of 335 mV at 10 mA cm −2 in 1 m KOH.…”

Section: Pyrolyzed Prussian Blue Analogs For Oxygen Electrocatalysismentioning

confidence: 99%

Metal–Organic Frameworks and Metal–Organic Gels for Oxygen Electrocatalysis: Structural and Compositional Considerations

2021

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Increasing demand for sustainable and clean energy is calling for the next‐generation energy conversion and storage technologies such as fuel cells, water electrolyzers, CO2/N2 reduction electrolyzers, metal–air batteries, etc. All these electrochemical processes involve oxygen electrocatalysis. Boosting the intrinsic activity and the active‐site density through rational design of metal–organic frameworks (MOFs) and metal–organic gels (MOGs) as precursors represents a new approach toward improving oxygen electrocatalysis efficiency. MOFs/MOGs afford a broad selection of combinations between metal nodes and organic linkers and are known to produce electrocatalysts with high surface areas, variable porosity, and excellent activity after pyrolysis. Some recent studies on MOFs/MOGs for oxygen electrocatalysis and their new perspectives in synthesis, characterization, and performance are discussed. New insights on the structural and compositional design in MOF/MOG‐derived oxygen electrocatalysts are summarized. Critical challenges and future research directions are also outlined.

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“…also reported a Co 3 O 4 microframes for OER from PBA‐CoCo (Co 3 [Co(CN) 6 ] 2 ) microcubes via ammonia etching and annealing in air . Kim et al also presented a CoSe 2 nanoboxes for efficient OER by the reaction of PBA‐CoCo nanocubes with ammonia and following calcination with selenium powder, as the schematic in Figure h. Except etching by ammonia, PBA can be converted into different components with hollow structure by anion exchange under base condition, such as sulphides and oxides, thus, many works can be developed from PB or PBA to produce aimed transition metal‐based materials for electrocatalysis.…”

Section: Electrocatalysts Derived From Pb and Pbamentioning

confidence: 99%

Functional Electrocatalysts Derived from Prussian Blue and its Analogues for Metal‐Air Batteries: Progress and Prospects

Deng

Wang

2019

Batteries & Supercaps

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air batteries holding exceptionally high energy densities have been heavily explored recently amongst the promising next generation energy suppliers. However, their development for real application is restricted mainly due to the sluggish rates of the oxygen-reduction reaction (ORR) and oxygen-evolution reaction (OER) in the positive electrode. Thus, searching a facile way to attain highly efficient ORR and OER electrocatalysts are highly desirable. The key factors to improve the electrochemical performance of materials are to optimize their low-dimensional feature and adjust effective compositions. Prussian blue and its analogues (PB/PBAs) with open framework have attracted growing attention as hopeful precursors and templates to diverse transition metal-based materials and carbon hybrids for ORR and OER. Compared to other precursors, PB/PBAs are more feasible for large-scale application due to their easy preparation, low cost, tuneable compositions and great environmental friendliness. In this review, recent progresses in the utilization of PB/PBA to rationally design and synthesize complex composites with controlled morphologies, sizes, and compositions for ORR, OER and metal-air batteries are described in detail. Afterwards, a brief summary of the synthetic methods to complex transition metal-based compositions with nanostructures converted from PB/PBAs are provided. Lastly, the research challenges and possible development direction of open framework materials for metal-air batteries are outlined through analysing the merits and drawbacks of using PB/PBAs as precursors.

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Prussian blue analogue metal organic framework-derived CoSe2 nanoboxes for highly efficient oxygen evolution reaction

Cited by 39 publications

References 16 publications

Hollow Functional Materials Derived from Metal–Organic Frameworks: Synthetic Strategies, Conversion Mechanisms, and Electrochemical Applications

Hollow Functional Materials Derived from Metal–Organic Frameworks: Synthetic Strategies, Conversion Mechanisms, and Electrochemical Applications

Metal–Organic Frameworks and Metal–Organic Gels for Oxygen Electrocatalysis: Structural and Compositional Considerations

Functional Electrocatalysts Derived from Prussian Blue and its Analogues for Metal‐Air Batteries: Progress and Prospects

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