Metal–organic frameworks: a promising platform for constructing non-noble electrocatalysts for the oxygen-reduction reaction

Li, Liangjun; He, Jiangxiu; Wang, Ying; Lv, Xiaoxia; Gu, Xin; Dai, Pengcheng; Liu, Dandan; Zhao, Xuebo

doi:10.1039/c8ta11704g

Cited by 169 publications

(88 citation statements)

References 246 publications

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“…Based on these values, we can concluded that the ORR activity of FeNC/rGO is comparable with that of commercial Pt/C (20 wt %) catalyst. Noteworthy, these values are also in the top ranks of catalytic activity among non‐noble catalysts towards ORR . In the acid medium (0.5 m H 2 SO 4 ), this catalyst also exhibited a considerably high ORR activity, with an Eon‐set of 0.86 V vs. RHE and an E1/2 of 0.72 V vs. RHE (seeing the LSV profiles in Figure S4 in Supporting information).…”

Section: Resultsmentioning

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

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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.

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Section: Resultsmentioning

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

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“…In recent years, there has been much interest in metal–organic framework (MOF) materials as crystalline porous hosts for gas adsorption, separation and catalysis 24 – 26 . Their high surface area, potentially active metal centres, diverse pore structure and, in exceptional cases, their redox activity, promote their use as electrocatalysts for H 2 and O 2 evolution and reduction of O 2 27 – 29 . However, highly crystalline MOFs with fully coordinated metal centres exhibit only low charge-transfer ability and formally no active centres for electrocatalysis 12 .…”

Section: Introductionmentioning

confidence: 99%

Electro-reduction of carbon dioxide at low over-potential at a metal–organic framework decorated cathode

Kang

Sheveleva

et al. 2020

Nat Commun

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Electrochemical reduction of carbon dioxide is a clean and highly attractive strategy for the production of organic products. However, this is hindered severely by the high negative potential required to activate carbon dioxide. Here, we report the preparation of a copper-electrode onto which the porous metal–organic framework [Cu2(L)] [H4L = 4,4′,4″,4′′′-(1,4-phenylenebis(pyridine-4,2,6-triyl))tetrabenzoic acid] can be deposited by electro-synthesis templated by an ionic liquid. This decorated electrode shows a remarkable onset potential for reduction of carbon dioxide to formic acid at −1.45 V vs. Ag/Ag+, representing a low value for electro-reduction of carbon dioxide in an organic electrolyte. A current density of 65.8 mA·cm−2 at −1.8 V vs. Ag/Ag+ is observed with a Faradaic efficiency to formic acid of 90.5%. Electron paramagnetic resonance spectroscopy confirms that the templated electro-synthesis affords structural defects in the metal–organic framework film comprising uncoupled Cu(II) centres homogenously distributed throughout. These active sites promote catalytic performance as confirmed by computational modelling.

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“…The tunable pore nature and constituents of MOFs systematically introduce different redox‐active and auxiliary centers to tune the catalytic properties for highly efficient and selective catalysis . MOFs have also been used in electrocatalysis, such as for the oxygen reduction reaction, hydrogen evolution reaction, electroreduction of CO 2 , and electrooxidation of ethanol . However, the inherent low conductivity of most MOFs heavily deteriorates their electrocatalytic properties, especially in electroorganic synthesis.…”

Section: Introductionmentioning

confidence: 99%

Suspending Ion Electrocatalysts in Charged Metal–Organic Frameworks to Improve the Conductivity and Selectivity in Electroorganic Synthesis

Guo

Zhang

et al. 2019

Chemistry An Asian Journal

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Electroorganic synthesis is an environmentally friendly alternative to traditionals ynthetic methods; however,t he application of this strategy is heavily hindered by low product selectivity.M etal-organic frameworks (MOFs) exhibit high selectivity in numerous catalytic reactions;h owever, poor conductivity heavily limits the application of MOFs in electroorganic synthesis. To realize the electrocatalytic application of MOFs in selectivee lectroorganic synthesis, ap ractically applicable strategy by suspending ion electrocatalysts in charged MOFs is herein reported. This approach could markedly improvet he product selectivity in electroorganic synthesis. In the electrocatalytic oxidatives elf-coupling of benzylamine experiments, the imine product selectivityi s markedly improved from 61.3 to 94.9 %, when the MOFbased electrocatalyst is used instead of the corresponding homogeneous electrocatalyst under the identical conditions. Therefore, this work opensanew route to improvet he product selectivity in electroorganic synthesis.[a] W.

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Metal–organic frameworks: a promising platform for constructing non-noble electrocatalysts for the oxygen-reduction reaction

Abstract: This review provides an overview of crucial roles that MOFs have played in constructing non-noble ORR catalysts.

Cited by 169 publications

References 246 publications

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

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

Electro-reduction of carbon dioxide at low over-potential at a metal–organic framework decorated cathode

Suspending Ion Electrocatalysts in Charged Metal–Organic Frameworks to Improve the Conductivity and Selectivity in Electroorganic Synthesis

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