A Co/metal–organic-framework bifunctional electrocatalyst: The effect of the surface cobalt oxidation state on oxygen evolution/reduction reactions in an alkaline electrolyte

He, Xiaobo; Yin, Fengxiang; Li, Guoru

doi:10.1016/j.ijhydene.2015.06.027

Cited by 110 publications

(56 citation statements)

References 65 publications

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“…The electrochemical impedance spectrum (EIS) analysis, and electrochemical double-layer capacitance (C dl ) test, further confirmed that the function of Fe 3+ in enhancing OER activity is through decreasing the charge transfer impedance and enlarging the catalytically active surface area in comparison Adv. [12,17,[24][25][26][27][28][29][30] Importantly, the Fe, Co co-contained Fe@BIF-91 electrocatalyst, showed enhanced OER activity greater than Fe-containing-only Fe@BIF-89. 2019, 6, 1801920 with BIF-91 ( Figures S6 and S7, Supporting Information).…”

Section: Oxygen Evolution Reactionmentioning

confidence: 97%

Co (II) Boron Imidazolate Framework with Rigid Auxiliary Linkers for Stable Electrocatalytic Oxygen Evolution Reaction

et al. 2019

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Metal–organic frameworks (MOFs) have significant potential for practical application in catalysis. However, many MOFs are shown to be sensitive to aqueous solution. This severely limits application of MOFs in electrocatalytic operations for energy production and storage. Here, a Co (II) boron imidazolate framework CoB(im) 4 (ndc) 0.5 ( BIF‐91 , im = imidazolate, ndc = 2,6‐naphthalenedicarboxylate) that is rationally designed and successfully tested for electrocatalytic application in strong alkaline (pH ≈ 14) solution is reported. In such a BIF system, the inherent carboxylate species segment large channel spaces into multiple domains in which each single channel is filled with ndc ligands through the effect of zeolite channel confinement. These ligands, with strong C—H···π interaction, act as a rigid auxiliary linker to significantly enhance the structural stability of the BIF‐91 framework. Additionally, the π‐conjugated effect in BIF‐91 stabilizes dopant Fe (III) at the atomic scale to construct Fe‐immobilized BIF‐91 ( Fe@BIF‐91 ). Due to the synergistic effect between Fe (III) guest and Co (II) in the framework, the Fe@BIF‐91 acts as an active and stable electrocatalyst for the oxygen evolution reaction in alkaline solution.

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Section: Oxygen Evolution Reactionmentioning

confidence: 97%

Co (II) Boron Imidazolate Framework with Rigid Auxiliary Linkers for Stable Electrocatalytic Oxygen Evolution Reaction

et al. 2019

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“…However, the ORR activities of these materials are still far from proton exchange membrane fuel cells' practical applications [8][9][10][11]. To further improve electrocatalytic activity, doping of transition metal is crucial to the Co-based chalcogenides.…”

Section: Introductionmentioning

confidence: 99%

Iron and nickel doped CoSe2 as efficient non precious metal catalysts for oxygen reduction

Jin

et al. 2017

International Journal of Hydrogen Energy

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Iron and nickel doped CoSe2 as efficient non precious metal catalysts for oxygen reduction AbstractIron and nickel doped CoSe2 were prepared by solvothermal method, and they were proved to be ternary chalcogenides by series of physical characterization. The effects of the iron and nickel contents on the oxygen reduction reaction were investigated by electrochemical measurements, and the highest activities were obtained on Co0.7Fe0.3Se2 and Co0.7Ni0.3Se2, respectively. Both Co0.7Fe0.3Se2 and Co0.7Ni0.3Se2 presented four-electron pathway. Furthermore, Co0.7Fe0.3Se2 exhibited more positive cathodic peak potential (0.564 V) and onset potential (0.759 V) than these of Co0.7Ni0.3Se2 (0.558 V and 0.741 V). And Co0.7Fe0.3Se2 displayed even superior stability and better tolerance to methanol, ethanol and ethylene glycol crossover effects than the commercial Pt/C (20 wt% Pt). Abstract: Iron and nickel doped CoSe2 were prepared by solvothermal method, and they were proved to be ternary chalcogenides by series of physical characterization.The effects of the iron and nickel contents on the oxygen reduction reaction were investigated by electrochemical measurements, and the highest activities were obtained on Co0.7Fe0.3Se2 and Co0.7Ni0.3Se2, respectively. Both Co0.7Fe0.3Se2 and Co0.7Ni0.3Se2 presented four-electron pathway. Furthermore, Co0.7Fe0.3Se2 exhibited more positive cathodic peak potential (0.564 V) and onset potential (0.759 V) than these of Co0.7Ni0.3Se2 (0.558V and 0.741V). And Co0.7Fe0.3Se2 displayed even superior stability and better tolerance to methanol, ethanol and ethylene glycol crossover effects than the commercial Pt/C (20 wt% Pt).

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“…He et al. reported a bifunctional electrocatalyst based on MIL‐101‐Cr (MIL=Material from Institut Lavoisier) and cobalt . The as‐prepared Co/MIL‐100‐Cr with higher Co II contents showed better ORR activity.…”

Section: Classification Of Mof‐based Orr Catalystsmentioning

confidence: 99%

Metal–Organic Frameworks Based Electrocatalysts for the Oxygen Reduction Reaction

et al. 2019

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In view of the clean and sustainable energy, metal–organic frameworks (MOFs) based materials, including pristine MOFs, MOF composites, and their derivatives are emerging as unique electrocatalysts for oxygen reduction reaction (ORR). Thanks to their tunable compositions and diverse structures, efficient MOF‐based materials provide new opportunities to accelerate the sluggish ORR at the cathode in fuel cells and metal–air batteries. This Minireview first provides some introduction of ORR and MOFs, followed by the classification of MOF‐based electrocatalysts towards ORR. Recent breakthroughs in engineering MOF‐based ORR electrocatalysts are highlighted with an emphasis on synthesis strategy, component, morphology, structure, electrocatalytic performance, and reaction mechanism. Finally, some current challenges and future perspectives for MOF‐based ORR electrocatalysts are also discussed.

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A Co/metal–organic-framework bifunctional electrocatalyst: The effect of the surface cobalt oxidation state on oxygen evolution/reduction reactions in an alkaline electrolyte

Cited by 110 publications

References 65 publications

Co (II) Boron Imidazolate Framework with Rigid Auxiliary Linkers for Stable Electrocatalytic Oxygen Evolution Reaction

Co (II) Boron Imidazolate Framework with Rigid Auxiliary Linkers for Stable Electrocatalytic Oxygen Evolution Reaction

Iron and nickel doped CoSe2 as efficient non precious metal catalysts for oxygen reduction

Metal–Organic Frameworks Based Electrocatalysts for the Oxygen Reduction Reaction

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