Porous Iron–Cobalt Alloy/Nitrogen‐Doped Carbon Cages Synthesized via Pyrolysis of Complex Metal–Organic Framework Hybrids for Oxygen Reduction

Guan, Buyuan; Lü, Yan; Wang, Yong; Wu, Minghong; Lou, Xiong Wen David

doi:10.1002/adfm.201706738

Cited by 242 publications

(118 citation statements)

References 47 publications

Supporting

Mentioning

117

Contrasting

Order By: Relevance

“…[218] On the contrary, the research on LD MOF/MOF composites with sophisticated architectures based on 1D and/or 2D MOF matrix, is still in its infancy. [220,221] Recently, the Fe-MOF NPcoated Ni-MOF nanosheet (Fe-MOF/Ni-MOF composite) was obtained by a stepwise conversion method (Figure 11e). [215] As shown in Figure 11b-d, MIL-88 nanorods are uniformly anchored on ZIF-8 polyhedrons.…”

Section: Ld Mof/mof Compositesmentioning

confidence: 99%

Structural Engineering of Low‐Dimensional Metal–Organic Frameworks: Synthesis, Properties, and Applications

et al. 2019

View full text Add to dashboard Cite

Low‐dimensional metal–organic frameworks (LD MOFs) have attracted increasing attention in recent years, which successfully combine the unique properties of MOFs, e.g., large surface area, tailorable structure, and uniform cavity, with the distinctive physical and chemical properties of LD nanomaterials, e.g., high aspect ratio, abundant accessible active sites, and flexibility. Significant progress has been made in the morphological and structural regulation of LD MOFs in recent years. It is still of great significance to further explore the synthetic principles and dimensional‐dependent properties of LD MOFs. In this review, recent progress in the synthesis of LD MOF‐based materials and their applications are summarized, with an emphasis on the distinctive advantages of LD MOFs over their bulk counterparties. First, the unique physical and chemical properties of LD MOF‐based materials are briefly introduced. Synthetic strategies of various LD MOFs, including 1D MOFs, 2D MOFs, and LD MOF‐based composites, as well as their derivatives, are then summarized. Furthermore, the potential applications of LD MOF‐based materials in catalysis, energy storage, gas adsorption and separation, and sensing are introduced. Finally, challenges and opportunities of this fascinating research field are proposed.

show abstract

Section: Ld Mof/mof Compositesmentioning

confidence: 99%

Structural Engineering of Low‐Dimensional Metal–Organic Frameworks: Synthesis, Properties, and Applications

et al. 2019

View full text Add to dashboard Cite

show abstract

“…[7] As an electro-catalyst, the optimal ORR catalyst not only need to lower down the reaction barriert ob reak OÀOb ond in adsorbed O 2 molecules, but also need to facilitate electron transfer,a sw ell as mass transport of reactants and reaction products. [10] While most of current studies are focusingo nc reating highly active catalytic sites, especially single-atomic MN x sites, [5b, 11] the simultaneouso ptimization on pore structure, electronic structure and morphologyi no ne materialstill remains rare. [9] In this regard, the ideal ORR catalyst should be those materials with advanced architectures and multiply favorable factors.…”

Section: Introductionmentioning

confidence: 99%

Bottom‐Up Fabrication of a Sandwich‐Like Carbon/Graphene Heterostructure with Built‐In FeNC Dopants as Non‐Noble Electrocatalyst for Oxygen Reduction Reaction

Xue

Gan

et al. 2020

Chemistry An Asian Journal

View full text Add to dashboard Cite

High-performance non-noble electrocatalysts for oxygen reduction reaction( ORR) are the prerequisite for large-scale utilization of fuel cells. Herein, at ype of sandwiched-liken on-noblee lectrocatalyst with highly dispersed FeN x active sites embedded in ah ierarchically porous carbon/graphene heterostructure was fabricated using a bottom-up strategy.T he in situ ion substitution of Fe 3 + in a nitrogen-containing MOF (ZIF-8) allows the Fe-heteroatoms to be uniformly distributed in the MOF precursor,a nd the assembly of Fe-doped ZIF-8 nano-crystals with grapheneoxide and in situ reduction of graphene-oxide afford as andwiched-like Fe-doped ZIF-8/graphene heterostructure. This type of heterostructuree nables simultaneous optimization of FeN x active sites, architecture and interfacep roperties for obtaining an electron-catalyst after ao ne-step carbonization. The synergistic effect of these factorsr ender the resulting catalysts with excellent ORR activities. The half-wave potential of 0.88 Vv s. RHE outperforms most of the none-noble metal catalysta nd is comparable with the commercial Pt/C (20 wt %) catalyst. Apart from the high activity,t his catalyst exhibits excellent durability and good methanol-tolerance. Detailed investigations demonstrate that am oderatec ontent of Fe dopantsc an effectively increaset he intrinsic activities, andt he hybridization of graphene can enhancet he reaction kinetics of ORR. The strategy proposed in this work gives an inspiration towards developing efficient noblemetal-free electrocatalysts for ORR.[a] Dr.

show abstract

“…z E-mail: tinglima@life.kyutech.ac.jp; yanqiangli@dlut.edu.cn their catalytic activity. [17][18][19][20] However, there is a dispute about the best ratios of these two metals, according to the types of metals and the original carbon materials. [21][22][23] Recently, phosphorus, which is a group 15 heteroatom (located in the same group as N) with similar chemical properties as nitrogen, has attracted considerable attention.…”

mentioning

confidence: 99%

Synthesis of Fe, Co Incorporated in P-Doped Porous Carbon Using a Metal-Organic Framework (MOF) Precursor as Stable Catalysts for Oxygen Reduction Reaction

Wang

Guo

et al. 2018

J. Electrochem. Soc.

View full text Add to dashboard Cite

Heteroatom-doped porous carbon materials have recently attracted significant attention due to their superior catalytic activities for an oxygen reduction reaction (ORR). Transition metals co-doped with heteroatom are considered to have positive effects on improving ORR catalytic activity and stability. We report a series of novel Fe, Co incorporated in P-doped carbon materials, which give high ORR performance by an in-situ carbonization method. The ratios of the two metals and the carbonization temperatures are the key factors for the electrocatalytic activity. Due to the synergistic effect of the two transition metals, the Fe, Co incorporated in P-doped porous carbon sample, carbonized at 900 • C, shows the highest catalytic activity and stability. Electrochemical measurements show that Fe, Co incorporated in P-doped porous carbon materials are promising electrocatalysts to substitute Pt-based catalysts for fuel cells application. With the increasing environmental pollution caused by the use of fossil fuels, it is of great urgency to develop renewable energy conversion and storage devices, such as fuel cells and metal-air batteries, which are beneficial to environmental protection. The disadvantage of the present technologies is due to the sluggish oxygen reduction reaction (ORR) kinetics at the cathode, which consequently limits the working efficiency of these devices, thereby creating a need for extra ORR catalysts to increase the reaction rate. The most popular and efficient ORR catalyst is the commercial Pt/C (Pt nanoparticles loading on the carbon (XC-72)). However, due to its expensive cost, poor durability, and CO poisoning in the reaction, 1-5 the need to explore new efficient, durable, and cheap catalysts to substitute the Pt/C is urgent. In past decades, several alternatives have been developed, such as noble metal-based nanoparticles, 5,6 non-noble metal catalysts, 7,8 and metal-free materials. 9 Heteroatom-doped carbon materials are the representatives of the metal-free materials and the mechanism of the reduction of oxygen has been widely investigated. There is a consensus that the pyridine-like N and graphite-like N (also called quaternary N) are more active than the pyrrole-type N in the N-doped carbon materials for ORR. 10,11 In general, the excellent ORR catalytic activity is ascribed to the heteroatom-doped carbon material increasing the asymmetry of the carbon atomic spin density in accordance with the theoretical calculations.12,13 In 2013, Masa et al. verified that the trace amount of transition metal with heteroatom co-doped in carbon materials significantly improve the catalyst activity.14 The meticulous research showed that transition metal-doped carbon would intensify the asymmetry of the carbon atomic spin density to promote ORR. 14,15 Thus, designing transition metal-heteroatom-C electrocatalysts is applicable to improving the ORR catalytic activity. For example, Mu et al. synthesized a novel three-dimensions (3D) Fe-N-nanocarbon intercalated graphene catalyst, which possesses a high ...

show abstract

Porous Iron–Cobalt Alloy/Nitrogen‐Doped Carbon Cages Synthesized via Pyrolysis of Complex Metal–Organic Framework Hybrids for Oxygen Reduction

Cited by 242 publications

References 47 publications

Structural Engineering of Low‐Dimensional Metal–Organic Frameworks: Synthesis, Properties, and Applications

Structural Engineering of Low‐Dimensional Metal–Organic Frameworks: Synthesis, Properties, and Applications

Bottom‐Up Fabrication of a Sandwich‐Like Carbon/Graphene Heterostructure with Built‐In FeNC Dopants as Non‐Noble Electrocatalyst for Oxygen Reduction Reaction

Synthesis of Fe, Co Incorporated in P-Doped Porous Carbon Using a Metal-Organic Framework (MOF) Precursor as Stable Catalysts for Oxygen Reduction Reaction

Contact Info

Product

Resources

About