Noble-Metal-Free MOF-74-Derived Nanocarbons: Insights on Metal Composition and Doping Effects on the Electrocatalytic Activity Toward Oxygen Reactions

Abdelkader‐Fernández, Víctor K.; Fernandes, Diana M.; Balula, Salete S.; Cunha‐Silva, Luís; Pérez-Mendoza, Manuel; López-Garzón, F.J.; Pereira, M.F.R.; Freire, Cristina

doi:10.1021/acsaem.8b02010

Cited by 65 publications

(33 citation statements)

References 50 publications

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“…The results show that this MFN nanosheets encapsulated in GA/NF is an ideal electrocatalytic candidate for industrialization application. These values for MFN@GA/NF outperform most recently reported pristine MOF catalysts in alkaline solutions (Table S1), such as MOF-74(η 10 = 410 mV), [31] CoFe-PYZ (η 10 = 300 mV), [32] ZIF-67@POM (η 10 = 287 mV), [33] NiFe-PBA (η 10 = 258 mV), [34] and CoFe-MOF(η 10 = 277 mV). [35] The high electrochemical activity of MFN@GA/NF is attributed to its desirable hierarchically porous structure composed of 2D nanosheets and 3D conductive substrate, which maximizes the utilization of catalytic active sites and facilitates both rapid mass transport and charge transfer.…”

Section: Resultssupporting

confidence: 61%

Bimetal‐organic Framework Encapsulated in Graphene Aerogel‐grafted Ni Foam: An Efficient Electrocatalyst for the Oxygen Evolution Reaction

et al. 2020

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Metal‐organic frameworks (MOFs) have been considered as promising platforms for preparing the efficient oxygen evolution reaction (OER) catalysts, but few of them are directly employed as active components due to their poor electrical conductivity. Herein, a lamellar bimetallic MFN (MIL‐53(FeNi)) encapsulated in graphene aerogel‐grafted Ni foam has been developed (denoted as MFN@GA/NF). The graphene aerogel (GA) provides abundant space for the in‐situ growth of MFN and functions as a “bridge” to connect nickel foam (NF) with MFN by virtue of good conductivity. Benefitting from its structural integrity, the obtained hierarchical MFN@GA/NF exhibited excellent OER performances in alkaline media with an overpotential of 250 mV (20 mA cm−2) and 326 mV (200 mA cm−2), as well as remarkable stability in continuous electrolysis for over 100 h. This work provides a new channel for engineering MOF‐based functional materials with featured architectures.

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Section: Resultssupporting

confidence: 61%

Bimetal‐organic Framework Encapsulated in Graphene Aerogel‐grafted Ni Foam: An Efficient Electrocatalyst for the Oxygen Evolution Reaction

et al. 2020

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“…In particular, MOFs have been employed as high active electrocatalysts to improve the sluggish reaction kinetics of water oxidation [i.e., the oxygen evolution reaction (OER)] as one of the determine steps and the key processes in water splitting and metal–air batteries . However, most of direct MOFs as electrocatalysts have poor long‐term electrochemical durability in reaction media (strong acid or strong base), limiting their practical application in the field of water splitting since the long‐term stability and high activity are equally important for catalysts . Besides, it is critical that improving MOF conductivity to enhance their intrinsic catalytic activity because of their low electronic conductivity and poor mass permeability.…”

Section: Methodsmentioning

confidence: 99%

Rational Design of a N,S Co‐Doped Supermicroporous CoFe–Organic Framework Platform for Water Oxidation

et al. 2020

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It remains ac hallenge to rational design of an ew metal-organic framework (MOF)a sh ighly efficient direct electrocatalysts for the oxygen evolution reaction(OER). Herein, we developed as imple and effective method to explore an ew pillaredlayered MOF with syringic acid as ap romising OER electrocatalyst. The isostructuralm ono-, heterobimetallic MOF and N,S codoped MOF by mixing thiourea were quicklys ynthesized in a high yield under solvothermal condition. Moreover,t he optimized N,S co-doped MOF exhibits the lowest overpotential of 254 mV at 10 mA cm À2 on ag lass carbon electrode andas mall Ta fel slope of 50 mV dec À1 ,e specially,t his catalysta lso possesses long-term electrochemical durability for at least 16 h. According to the characterization, the incorporationo fNa nd S atoms into this heterobimetallic CoFe-based MOF could modify its pore structure,t une the electronic structure, accordingly,i mprove the mass and electron transportation,a nd facilitate the formation of active species, as ac onsequence, the improveda ctivity of this new N,S co-doped MOF for OER should be mainly be ascribed to higher electrochemical activation toward the actives peciesv ia in situ surface modification during the OER process.Metal-organic frameworks (MOFs), especially,p illared-layered MOFs, are rising star materials in the field of materials science because of their ultrafinep orosity,r ich active metal-sites and tunable structures, which have attracted enormousi nterest and have aw idespread application in catalysis, energy conversion technologies, and environmentally friendly technologies. [1][2][3][4][5][6][7][8][9][10][11][12][13] In particular,M OFs have been employed as high active electrocatalysts to improvet he sluggish reactionk inetics of water oxidation[ i.e.,t he oxygen evolution reaction (OER)] as one of the determine steps and the key processes in water splitting and metal-air batteries. [5][6][7][8][9][10][11][12][13] However,m ost of direct MOFs as electrocatalysts have poor long-term electrochemical durability in reaction media (strong acid or strongb ase), limiting their practical application in the field of water splitting since the long-term stability and high activity are equally importantf or catalysts. [14][15][16][17][18][19] Besides, it is criticalt hat improving MOF conductivity to enhancet heir intrinsic catalytic activity because of their low electronic conductivity and poor mass permeability.O ne effective strategy is to fabricate their derivatives through high temperature pyrolysis or chemical conversions, [20][21][22][23][24][25][26][27][28][29][30][31][32][33] such as metal oxides or hydroxides, [24][25][26] carbonbased derivatives, [27][28][29][30] and composite materials. [31][32][33] Although these derivatives exhibit improved electrocatalytic performance compared with the pristine MOFs precursors, during the pyrolysis, the intrinsics tructure of MOFs has been destroyed, simultaneously,t hese expensive organic ligands have been decomposed, severely hampering their practically largesca...

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“…Co NPs encapsulated in N-doped graphitized carbon networks are supposed to improve electron conductivity of the catalyst and act as active sites for OER, which result in effective oxygen electrocatalysis. 1,39,[47][48][49] In addition, the ORR and OER performances of NC, GC and NC + GC (the obtained NC (11 mg) and GC (11 mg) powder were mixed physically) and C-N/Co (1/2) were compared (Fig. S5 †).…”

Section: Resultsmentioning

confidence: 99%

Zeolitic imidazole framework derived N-doped porous carbon/metal cobalt nanoparticles hybrid for oxygen electrocatalysis and rechargeable Zn–air batteries

Liu

Cai

et al. 2021

RSC Adv.

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Noble-Metal-Free MOF-74-Derived Nanocarbons: Insights on Metal Composition and Doping Effects on the Electrocatalytic Activity Toward Oxygen Reactions

Cited by 65 publications

References 50 publications

Bimetal‐organic Framework Encapsulated in Graphene Aerogel‐grafted Ni Foam: An Efficient Electrocatalyst for the Oxygen Evolution Reaction

Bimetal‐organic Framework Encapsulated in Graphene Aerogel‐grafted Ni Foam: An Efficient Electrocatalyst for the Oxygen Evolution Reaction

Rational Design of a N,S Co‐Doped Supermicroporous CoFe–Organic Framework Platform for Water Oxidation

Zeolitic imidazole framework derived N-doped porous carbon/metal cobalt nanoparticles hybrid for oxygen electrocatalysis and rechargeable Zn–air batteries

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