Nitrogen-doped Co/Co9S8/partly-graphitized carbon as durable catalysts for oxygen reduction in microbial fuel cells

Li, Rui; Dai, Ying; Chen, Baibing; Zou, Jinlong; Jiang, Baojiang; Fu, Honggang

doi:10.1016/j.jpowsour.2015.12.115

Cited by 89 publications

(38 citation statements)

References 51 publications

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“…Some of the cobalt sulfide materials have become robust candidates for use in lithium ion battery electrodes due to their low overpotential, high durability, and good cyclic performance . Cobalt sulfides including Co 3 S 4 , CoS 2 , Co 1‐ x S, etc., are also regarded as one kind of the most active ORR catalysts among all chalcogenides. Especially, some cobalt sulfide‐based materials have recently been reported to have bifunctional catalyst performance.…”

Section: Introductionmentioning

confidence: 99%

Fe₃O₄‐Decorated Co₉S₈ Nanoparticles In Situ Grown on Reduced Graphene Oxide: A New and Efficient Electrocatalyst for Oxygen Evolution Reaction

Yang

Zhu

Liu

et al. 2016

Adv Funct Materials

363

210

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Cobalt sulfide materials have attracted enormous interest as low‐cost alternatives to noble‐metal catalysts capable of catalyzing both oxygen reduction and oxygen evolution reactions. Although recent advances have been achieved in the development of various cobalt sulfide composites to expedite their oxygen reduction reaction properties, to improve their poor oxygen evolution reaction (OER) activity is still challenging, which significantly limits their utilization. Here, the synthesis of Fe3O4‐decorated Co9S8 nanoparticles in situ grown on a reduced graphene oxide surface (Fe3O4@Co9S8/rGO) and the use of it as a remarkably active and stable OER catalyst are first reported. Loading of Fe3O4 on cobalt sulfide induces the formation of pure phase Co9S8 and highly improves the catalytic activity for OER. The composite exhibits superior OER performance with a small overpotential of 0.34 V at the current density of 10 mA cm−2 and high stability. It is believed that the electron transfer trend from Fe species to Co9S8 promotes the breaking of the Co–O bond in the stable configuration (Co–O–O superoxo group), attributing to the excellent catalytic activity. This development offers a new and effective cobalt sulfide‐based oxygen evolution electrocatalysts to replace the expensive commercial catalysts such as RuO2 or IrO2.

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Section: Introductionmentioning

confidence: 99%

Fe₃O₄‐Decorated Co₉S₈ Nanoparticles In Situ Grown on Reduced Graphene Oxide: A New and Efficient Electrocatalyst for Oxygen Evolution Reaction

Yang

Zhu

Liu

et al. 2016

Adv Funct Materials

363

210

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“…High‐resolution XPS spectrum of C 1s (Figure S5a) was deconvoluted into four peaks: the C=C−C at 284.6 eV, C−S at 285.7 eV, C−O and C−N at 286.6 eV and C=O at 288.3 eV . Deconvolution of the N 1s signal of Co 9 S 8 /NHCS (Figure S5b) yielded two peaks due to pyridinic N at 398.3 eV and quaternary N at 400.8 eV . The above results implied the nitrogen successfully doped into carbon shell of in NHCS that would possess advantaged charge transfer ability .…”

Section: Resultsmentioning

confidence: 66%

“…Microbial fuel cells (MFCs), a flexible and sustainable technology capable of power generation and simultaneous wastewater treatment, can serve as a prospective alternative settlement for excessive exploitation of resources and aggravating environmental degradation problems . However, oxygen reduction reaction (ORR), playing a crucial role in the operation of MFC devices, is regarded as nature of sluggishness due to kinetically slack procedures involving adoption of oxygen and cleavage of O−O bond . Conventionally, noble platinum exhibits high catalytic efficiency for ORR with inescapable weaknesses that Pt or Pt‐based catalysts are too expensive, scarce and less durable to put into large‐scale application in practice .…”

Section: Introductionmentioning

confidence: 99%

Metallic Co₉S₈ Coupled Hollow N‐Doped Carbon Sphere with Synergistic Interface Structure for Efficient Electricity Generation in Microbial Fuel Cells

Pan

Xiao

et al. 2019

ChemCatChem

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The high cost, low abundance and poor durability of precious metal catalysts greatly hinder the practical applications of microbial fuel cells (MFCs) for bioremediation and bioelectricity generation. It is imperative to develop highly efficient and robust noble metal-free catalysts for the high power density of MFCs. In this work, we present a scalable and cost-effective strategy to synthesize Co 9 S 8 nanoparticles coupled with nitrogen-doped hollow carbon sphere (NHCS), which subtly constructs synergistic interface structures that expose plentiful active sites and afford high conductive channel for charge transfer. The as-obtained porous Co 9 S 8 /NHCS exhibits excellent catalytic activity, and superior stability as well as methanol tolerance during oxygen reduction reaction (ORR) process in both alkaline and neutral environment. The MFC device equipped with Co 9 S 8 /NHCS as air-cathode achieves a remarkable power density of 704 � 22 mW m À 2 and outstanding chemical oxygen demand (COD) removal rate of 96.28 % � 0.50 %, which is even superior to the performance of commercial Pt/C catalyst. The favorable results provide a new concept to design and explore porous noble metal-free electrocatalysts for clean and sustainable energy conversion.

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“…Figure a shows that the spherical nanoparticles of Co 9 S 8 @CNS‐800 are uniform in both, size and shape, and also well encapsulated in the graphite carbon. The HRTEM image of the Co 9 S 8 @CNS‐800 is shown in Figure (b), it was observed that the size of Co 9 S 8 nanoparticles was about 10 nm and the d‐spacing value (lattice fringes) was found to be 0.29 nm assigned to the (311) plane of Co 9 S 8 . It is clearly observed that the Co 9 S 8 nanoparticle was wrapped inside graphite carbon layers.…”

Section: Resultsmentioning

confidence: 95%

Bifunctional Electrocatalysts (Co₉S₈@NSC) Derived from a Polymer‐metal Complex for the Oxygen Reduction and Oxygen Evolution Reactions

et al. 2017

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Bifunctional catalysts for water electrolysis are important for renewable and clean energy transformation processes like fuel cells, lithium−oxygen batteries, and so forth. Despite tremendous efforts, developing efficient bifunctional electrocatalysts with low cost and long‐term durability remains a great challenge. Herein, the synthesis of Co9S8 nanocrystals encapsulated in nitrogen/sulfur‐doped mesoporous graphitized carbon derived from a polymer−metal complex is reported, which exhibit similar electrocatalytic activity and superior stability for water‐splitting reactions (oxygen reduction/oxygen evolution). The remarkable electrochemical properties are mainly attributed to the synergetic effects between Co9S8, heteroatoms and graphitized carbon in alkaline medium, especially for the oxygen evolution reaction. The present strategy to fabricate Co9S8 nanocrystals in nitrogen and sulfur doped carbon using a single‐source precursor offers many prospects in developing highly effective electrocatalysts in rechargeable metal−air batteries.

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Nitrogen-doped Co/Co9S8/partly-graphitized carbon as durable catalysts for oxygen reduction in microbial fuel cells

Cited by 89 publications

References 51 publications

Fe₃O₄‐Decorated Co₉S₈ Nanoparticles In Situ Grown on Reduced Graphene Oxide: A New and Efficient Electrocatalyst for Oxygen Evolution Reaction

Fe₃O₄‐Decorated Co₉S₈ Nanoparticles In Situ Grown on Reduced Graphene Oxide: A New and Efficient Electrocatalyst for Oxygen Evolution Reaction

Metallic Co₉S₈ Coupled Hollow N‐Doped Carbon Sphere with Synergistic Interface Structure for Efficient Electricity Generation in Microbial Fuel Cells

Bifunctional Electrocatalysts (Co₉S₈@NSC) Derived from a Polymer‐metal Complex for the Oxygen Reduction and Oxygen Evolution Reactions

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Nitrogen-doped Co/Co9S8/partly-graphitized carbon as durable catalysts for oxygen reduction in microbial fuel cells

Cited by 89 publications

References 51 publications

Fe3O4‐Decorated Co9S8 Nanoparticles In Situ Grown on Reduced Graphene Oxide: A New and Efficient Electrocatalyst for Oxygen Evolution Reaction

Fe3O4‐Decorated Co9S8 Nanoparticles In Situ Grown on Reduced Graphene Oxide: A New and Efficient Electrocatalyst for Oxygen Evolution Reaction

Metallic Co9S8 Coupled Hollow N‐Doped Carbon Sphere with Synergistic Interface Structure for Efficient Electricity Generation in Microbial Fuel Cells

Bifunctional Electrocatalysts (Co9S8@NSC) Derived from a Polymer‐metal Complex for the Oxygen Reduction and Oxygen Evolution Reactions

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Fe₃O₄‐Decorated Co₉S₈ Nanoparticles In Situ Grown on Reduced Graphene Oxide: A New and Efficient Electrocatalyst for Oxygen Evolution Reaction

Fe₃O₄‐Decorated Co₉S₈ Nanoparticles In Situ Grown on Reduced Graphene Oxide: A New and Efficient Electrocatalyst for Oxygen Evolution Reaction

Metallic Co₉S₈ Coupled Hollow N‐Doped Carbon Sphere with Synergistic Interface Structure for Efficient Electricity Generation in Microbial Fuel Cells

Bifunctional Electrocatalysts (Co₉S₈@NSC) Derived from a Polymer‐metal Complex for the Oxygen Reduction and Oxygen Evolution Reactions