Hydrothermal Synthesis of Metal–Polyphenol Coordination Crystals and Their Derived Metal/N‐doped Carbon Composites for Oxygen Electrocatalysis

Wei, Jing; Liang, Yan; Hu, Yaoxin; Kong, Biao; Zhang, Jin; Gu, Qinfen; Tong, Yuping; Wang, Xianbiao; Jiang, San Ping; Wang, Huanting

doi:10.1002/anie.201606327

Cited by 184 publications

(98 citation statements)

References 54 publications

(21 reference statements)

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“…[19][20][21][22][23][24] Additionally, introducing transition metal ions (such as Co and Fe) into N-doped carbon can remarkably boost the catalytic performance of ORR due to the formation of M-N-C (MvFe, Co) active sites. [25][26][27] To produce a hollow M-N-C containing structure, metal ions or N elements are typically introduced into the hollow carbon structure by extra procedures, 28,29 which would easily cause uneven distribution and agglomeration after carbonization. Thus, developing an efficient way to synthesize functional hollow carbon materials containing homogeneous active sites is highly desirable.…”

Section: Introductionmentioning

confidence: 99%

“…59,60 Furthermore, pyridinic N and pyrrolic N can coordinate with Co to form Co-N x , which is more active than only N-doped carbon materials for ORR. 20,27 For comparison, hollow Co/N carbon particles carbonized at different temperatures and after acid leaching were also investigated. XRD patterns of hollow Co/N carbon particles prepared at different temperatures in Fig.…”

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confidence: 99%

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Metal–polydopamine frameworks and their transformation to hollow metal/N-doped carbon particles

et al. 2017

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aWe present a new strategy for in situ transformation of metal-organic framework (MOF) crystals to hollow metal-organic structures through polycondensation of dopamine. The hollow metal-polydopamine (PDA) particles are formed by a coordination assembly of metal ions (Co and Zn) and PDA, inheriting the morphology of MOF (ZIF-67 and ZIF-8) crystals. The hollow porous metal/N-carbon particles morphosynthetically transformed from hollow metal-PDA particles exhibit excellent oxygen reduction electrocatalytic activity. The strategy presented here is promising for synthesizing hollow metal-organic polymer (metal-carbon) particles with diverse morphologies for energy and environmental applications.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Metal–polydopamine frameworks and their transformation to hollow metal/N-doped carbon particles

et al. 2017

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“…[7] Although the individual particles are highly graphitized, each particle is isolated from each other (i.e.t he particles are not interconnected to ah igh degree). [8] Thus,t he spaces between these particles seriously hinder the transportation of electrons,thus decreasing the electrical conductivity.Therefore,the development of 3D porous carbon networks with excellent connectivity between the carbon particles is highly important for achieving the optimized utilization of MOF-derived carbon materials in EES applications.…”

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confidence: 99%

Spontaneous Weaving of Graphitic Carbon Networks Synthesized by Pyrolysis of ZIF‐67 Crystals

et al. 2017

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Three-dimensional (3D) networks of graphitic carbon are promising materials for energy storage and conversion devices because of their high electrical conductivity, which is promoted by the good interconnection between the carbon particles.H owever,i ti ss till difficult to directly synthesize such carbon networks.H erein, we report the novel synthesis of 3D graphitic carbon networks through the pyrolysis of nanosized ZIF-67 crystals.I nterestingly,t he unusual effect of downsizing the ZIF-67 crystals and the incorporation of catalytic Co nanoparticles was the spontaneous formation of graphitic networks.The obtained graphitic carbon networks showe xcellent electrochemical performance for the insertion and extraction of potassium ions.Several members of the carbon family,s uch as diamond, fullerene,g raphite,c arbon nanotubes,a nd graphene,h ave been well-studied and prepared by many different approaches.[1] Nanoporous carbons have attracted great interest in many research fields.T he high specific surface area and porosity of nanoporous carbons make them promising candidates for electrochemical energy storage (EES) and conversion devices.[2] Fors uch applications,n anoporous carbons with highly graphitic walls and good electrical conductivity are highly desirable. [3] In general, nanoporous carbons with highly graphitic structures are prepared by thermal pyrolysis of organic precursors at high temperatures (! 800 8 8C).[4] However,such thermal treatment is unfavorable for the large-scale preparation of nanoporous carbons because of the high energy consumption and complicated procedures.I nr ecent years,t he pyrolysis of metal-organic frameworks (MOFs;o rp orous coordination polymers (PCPs)) has been recognized as an effective approach to synthesize nanoporous carbons.[5] MOFs are porous crystalline materials formed by coordinative bonding between metal ions or clusters and organic linkers.[6] Theb reakable coordination bonds,a nd carbon-rich organic component make MOFs appropriate precursors for the preparation of nanoporous carbons.T he metal contents (e.g.C o) of MOFs have been shown to promote the formation of highly graphitic frameworks even at low temperatures. [7] Although the individual particles are highly graphitized, each particle is isolated from each other (i.e.t he particles are not interconnected to ah igh degree).[8] Thus,t he spaces between these particles seriously hinder the transportation of electrons,thus decreasing the electrical conductivity.Therefore,the development of 3D porous carbon networks with excellent connectivity between the carbon particles is highly important for achieving the optimized utilization of MOF-derived carbon materials in EES applications.Herein, we have carefully investigated the size-dependent pyrolysis of aC o-containing zeolitic imidazolate framework (ZIF-67). It is found that areduction in the size of the ZIF-67 particles can lead to as pontaneous welding of the resulting carbon particles,t hereby giving rise to the formation of 3D porous carbon network...

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“…This indicates a good immunity of N,P co‐doped carbon catalyst towards methanol crossover as a promising metal‐free electrocatalyst for direct methanol fuel cells. These results reveal that N,P co‐doped carbon is one of the best reported metal‐free catalysts, better than Carbon‐L, C‐COP‐4, and MPSA/GO‐1000 even superior to some metal‐based catalysts such as Mo−N/C@MoS 2 and Fe‐TA‐800 (Table ).…”

Section: Resultsmentioning

confidence: 83%

COF‐Derived N,P Co‐Doped Carbon as a Metal‐Free Catalyst for Highly Efficient Oxygen Reduction Reaction

et al. 2019

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Hydrothermal Synthesis of Metal–Polyphenol Coordination Crystals and Their Derived Metal/N‐doped Carbon Composites for Oxygen Electrocatalysis

Cited by 184 publications

References 54 publications

Metal–polydopamine frameworks and their transformation to hollow metal/N-doped carbon particles

Metal–polydopamine frameworks and their transformation to hollow metal/N-doped carbon particles

Spontaneous Weaving of Graphitic Carbon Networks Synthesized by Pyrolysis of ZIF‐67 Crystals

COF‐Derived N,P Co‐Doped Carbon as a Metal‐Free Catalyst for Highly Efficient Oxygen Reduction Reaction

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