N‐Doped Carbon Aerogel Derived from a Metal–Organic Framework Foam as an Efficient Electrocatalyst for Oxygen Reduction

Yi, Jun‐Dong; Zhang, Meng-Di; Hou, Ying; Huang, Yuan–Biao; Cao, Rong

doi:10.1002/asia.201900727

Cited by 24 publications

(5 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After carbonization, the light ZIF‐8/CMC foam was converted into an N‐doped carbon aerogel (NCA) (Figure 15e). [ 145 ] The SEM and TEM images in Figure 15f,g show the typical macropores, which were generated from the outward contraction of ZIF‐8 nanocrystals during pyrolysis.…”

Section: Hollowing Mechanisms For Zif‐8/67 Derived Hcasmentioning

confidence: 99%

Hollow Carbon‐Based Nanoarchitectures Based on ZIF: Inward/Outward Contraction Mechanism and Beyond

Song

Jiang

Cheng

et al. 2020

Small

View full text Add to dashboard Cite

Hollow carbon‐based nanoarchitectures (HCAs) derived from zeolitic imidazolate frameworks (ZIFs), by virtue of their controllable morphology and dimension, high specific surface area and nitrogen content, richness of metal/metal compounds active sites, and hierarchical pore structure and easy exposure of active sites, have attracted great interests in many fields of applications, especially in heterogeneous catalysis, and electrochemical energy storage and conversion. Despite various approaches that have been developed to prepare ZIF‐derived HCAs, the hollowing mechanism has not been clearly disclosed. Herein, a specialized overview of the recent progress of ZIF‐derived HCAs is introduced to provide an insight into their preparation strategy and the corresponding hollowing mechanisms. Based on the fundamental understanding of the structural evolution of ZIF nanocrystals during the high‐temperature pyrolysis process, the hollowing mechanisms of ZIF‐derived HCAs are classified into four categories: i) inward contraction of core–shell template@ZIF composites or hollow ZIFs, ii) outward contraction of ZIF@shell composites, iii) special outward contraction of ZIF arrays, and iv) mechanism beyond inward/outward contraction of pure ZIF nanocrystals. Finally, an outlook on the development prospects and challenges of HCAs based on ZIF precursors, especially in terms of controlled synthesis and future electrochemical application, is further discussed.

show abstract

Section: Hollowing Mechanisms For Zif‐8/67 Derived Hcasmentioning

confidence: 99%

Hollow Carbon‐Based Nanoarchitectures Based on ZIF: Inward/Outward Contraction Mechanism and Beyond

Song

Jiang

Cheng

et al. 2020

Small

View full text Add to dashboard Cite

show abstract

“…From Figure 6d,g,j, the N1s spectra can be divided into four peaks located at 398.2, 400.3, 401.3, and 404.0 eV. Among them, the peaks at 400.3, 401.3, and 404.0 eV represent pyrrole N, graphitized N, and quaternary N, respectively, whereas the peak situated at 398.2 eV represents the pyridine N and Fe-N [35][36][37]. According to the literature [38], the N group-modified conductive surfaces are able to provide binding sites because the active sites are generated on the surfaces via metal-nitrogen coordination.…”

Section: Resultsmentioning

confidence: 98%

“…According to the literature [38], the N group-modified conductive surfaces are able to provide binding sites because the active sites are generated on the surfaces via metal-nitrogen coordination. In addition, the ORR activity of N-doped catalysts is also affected by the content of pyridine and graphitized N. It is generally considered that pyridine N and graphitized N might promote oxygen-selective reduction through a four-electron mechanism [37,39,40]. Table 1 displays the nitrogen contents of all three catalysts.…”

Section: Resultsmentioning

confidence: 99%

Preparation of High-Efficiency Fe/N-Doped Carbon Catalysts Derived from Graphite Phase Carbon Nitride for Reduction of Oxygen

Wang,

Liu,

Wang

et al. 2024

Catalysts

View full text Add to dashboard Cite

Fe/N-doped carbon (Fe-NC) is an excellent base-metal catalyst for use in an electrocatalytic oxygen reduction reaction (ORR) with high activity. In this paper, graphite phase carbon nitride (g-C3N4) was first obtained from the pyrolyzing of melamine, and then different proportions of FeCl3 were separately doped into g-C3N4 to further prepare the Fe-NC catalyst. The Fe-NC catalyst was applied in an ORR reaction, and the results show that the Fe-NC catalyst doped with 0.5 mmol FeCl3 possesses exceptional electrocatalytic performance, with an onset potential of 0.96 V and a half-wave potential of 0.81 V, which approaches that of a Pt/C catalyst. Meanwhile, the Fe-NC catalyst displays high stability and methanol resistance. The results supply a new way to prepare efficient ORR electrocatalysts.

show abstract

“…Many other types of hydrogels and aerogels have been utilized to prepare 3D MOF composites (Table ). − …”

Section: Summary and Future Perspectives On The Practical Utilization...mentioning

confidence: 99%

Practical MOF Nanoarchitectonics: New Strategies for Enhancing the Processability of MOFs for Practical Applications

Cheng¹,

et al. 2020

View full text Add to dashboard Cite

Over the past decades, the development of porous materials has directly or indirectly affected industrial production methods. Metal−organic frameworks (MOFs) as an emerging class of porous materials exhibit some unique advantages, including controllable composition, a large surface area, high porosity, and so on. These attractive characteristics of MOFs have led to their potential applications in energy storage and conversion devices, drug delivery, adsorption and storage, sensors, and other areas. However, powdered MOFs have limited practical applications owing to poor processability, safety hazards from dust formation, and poor recyclability. In addition, the inherent micro/ mesoporosities of MOFs also reduce the accessibility and diffusion kinetics for large molecules. To improve their processability for practical applications, MOFs are often deposited as MOF layers or films (i.e., MOF-coated composites) on supporting materials or are formed into 3D structured composites, such as aerogels and hydrogels. In this article, we review recent researches on these MOF composites, including their synthetic methods and potential applications in energy storage devices, heavy metal ion adsorption, and water purification. Finally, the future outlook and challenges associated with the large-scale fabrication of MOF-based composites for practical applications are discussed.

show abstract

N‐Doped Carbon Aerogel Derived from a Metal–Organic Framework Foam as an Efficient Electrocatalyst for Oxygen Reduction

Cited by 24 publications

References 62 publications

Hollow Carbon‐Based Nanoarchitectures Based on ZIF: Inward/Outward Contraction Mechanism and Beyond

Hollow Carbon‐Based Nanoarchitectures Based on ZIF: Inward/Outward Contraction Mechanism and Beyond

Preparation of High-Efficiency Fe/N-Doped Carbon Catalysts Derived from Graphite Phase Carbon Nitride for Reduction of Oxygen

Practical MOF Nanoarchitectonics: New Strategies for Enhancing the Processability of MOFs for Practical Applications

Contact Info

Product

Resources

About