Spinel-type lithium cobalt oxide as a bifunctional electrocatalyst for the oxygen evolution and oxygen reduction reactions

Maiyalagan, T.; Jarvis, Karalee; Therese, Soosairaj; Ferreira, Paulo J.; Manthiram, Arumugam

doi:10.1038/ncomms4949

Cited by 607 publications

(424 citation statements)

References 48 publications

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“…The current density at 1.65 V versus RHE reaches 51.2 mA cm −2 , which is 1.6 times higher than that of the CoO x ‐air catalyst (31.5 mA cm −2 ) and 4.5 times higher than that of IrO x nanoparticles (11.5 mA cm −2 ). The onset potentials of the CoO x ‐vacuum and CoO x ‐air catalysts are 1.46 and 1.48 V, respectively, which are substantial lower than almost all of the previously reported CoO x OER catalysts9, 10, 11, 12, 18, 21, 23, 24, 26, 40 (see summarized references in Table S1, Supporting Information).…”

Section: Resultsmentioning

confidence: 65%

Bio‐Inspired Leaf‐Mimicking Nanosheet/Nanotube Heterostructure as a Highly Efficient Oxygen Evolution Catalyst

et al. 2015

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Plant leaves represent a unique 2D/1D heterostructure for enhanced surface reaction and efficient mass transport. Inspired by plant leaves, a 2D/1D CoOx heterostructure is developed that is composed of ultrathin CoOx nanosheets further assembled into a nanotube structure. This bio‐inspired architecture allows a highly active Co2+ electronic structure for an efficient oxygen evolution reaction (OER) at the atomic scale, ultrahigh surface area (371 m2 g−1) for interfacial electrochemical reaction at the nanoscale, and enhanced transport of charge and electrolyte over CoOx nanotube building blocks at the microscale. Consequently, this CoOx nanosheet/nanotube heterostructure demonstrates a record‐high OER performance based on cobalt compounds reported so far, with an onset potential of ≈1.46 V versus reversible hydrogen electrode (RHE), a current density of 51.2 mA cm−2 at 1.65 V versus RHE, and a Tafel slope of 75 mV dec−1. Using the CoOx nanosheet/nanotube catalyst and a Pt‐mesh, a full water splitting cell with a 1.5‐V battery is also demonstrated.

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Section: Resultsmentioning

confidence: 65%

Bio‐Inspired Leaf‐Mimicking Nanosheet/Nanotube Heterostructure as a Highly Efficient Oxygen Evolution Catalyst

et al. 2015

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“…[ 11 ] The method of oxidation, [ 12 ] crystallinity, and pH range of reaction has been found to play a profound role during oxygen evolution. [ 9,13 ] Co 3 O 4 nanoparticles have been grown on nitrogen-doped graphene to increase electrical conductivity. The additions of precious metal dopants (e.g., gold) on manganese oxides [ 14 ] and cobalt oxides [ 15 ] enhance their catalytic activities at the expense of cost.…”

Section: Introductionmentioning

confidence: 99%

Controlling the Active Sites of Sulfur‐Doped Carbon Nanotube–Graphene Nanolobes for Highly Efficient Oxygen Evolution and Reduction Catalysis

El-Sawy

Mosa

et al. 2015

Advanced Energy Materials

284

182

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Controlling active sites of metal‐free catalysts is an important strategy to enhance activity of the oxygen evolution reaction (OER). Many attempts have been made to develop metal‐free catalysts, but the lack of understanding of active‐sites at the atomic‐level has slowed the design of highly active and stable metal‐free catalysts. A sequential two‐step strategy to dope sulfur into carbon nanotube–graphene nanolobes is developed. This bidoping strategy introduces stable sulfur–carbon active‐sites. Fluorescence emission of the sulfur K‐edge by X‐ray absorption near edge spectroscopy (XANES) and scanning transmission electron microscopy electron energy loss spectroscopy (STEM‐EELS) mapping and spectra confirm that increasing the incorporation of heterocyclic sulfur into the carbon ring of CNTs not only enhances OER activity with an overpotential of 350 mV at a current density of 10 mA cm−2, but also retains 100% of stability after 75 h. The bidoped sulfur carbon nanotube–graphene nanolobes behave like the state‐of‐the‐art catalysts for OER but outperform those systems in terms of turnover frequency (TOF) which is two orders of magnitude greater than (20% Ir/C) at 400 mV overpotential with very high mass activity 1000 mA cm−2 at 570 mV. Moreover, the sulfur bidoping strategy shows high catalytic activity for the oxygen reduction reaction (ORR). Stable bifunctional (ORR and OER) catalysts are low cost, and light‐weight bidoped sulfur carbon nanotubes are potential candidates for next‐generation metal‐free regenerative fuel cells.

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“…Similarly, other spinel oxides including NiCo 2 O 4 and LiCoO 2 have also been reported as high-performance ORR/OER catalysts for metal-air batteries, and their active sites are originated from the Co 4 O 4 cubane subunits. [49,50] Perovskite oxides (ABO 3 ) are also widely investigated as bifunctional ORR/OER catalyst in alkaline electrolytes. [21,[51][52][53][54][55][56][57][58] Their compositions and properties can be finely tuned by partially substituting A and B with other metal components.…”

Section: Mixed-metal Engineeringmentioning

confidence: 99%

Design of Efficient Bifunctional Oxygen Reduction/Evolution Electrocatalyst: Recent Advances and Perspectives

Huang

Wang

Peng

et al. 2017

Advanced Energy Materials

709

448

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Oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are the two most important reactions in rechargeable metal‐air battery, a promising technology to meet the energy requirements for various applications. The development of low‐cost, highly efficient and stable bifunctional ORR/OER catalysts is critical for a large‐scale application of this technology. In this review, the authors first introduce the fundamentals of bifunctional ORR/OER electrocatalysis in alkaline electrolyte. Various types of nanostructured materials as bifunctional ORR/OER catalysts including metal oxide, hydroxide and sulfide, functional carbon material, metal, and their composites are then reviewed. The crucial factors that can be used to tune the activity of the catalyst towards ORR/OER are summarized, including (1) phase, morphology, crystal facet, defect, mixed‐metal and strain engineering for metal oxide; (2) heteroatom doping, topological defects, and formation of metal‐N‐C structure for carbon material; (3) alloy effect for metal. These experiences lay the foundation for large scale application of metal‐air battery and can also effectively guide the rational design of catalysts for other electrocatalytic reactions.

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Spinel-type lithium cobalt oxide as a bifunctional electrocatalyst for the oxygen evolution and oxygen reduction reactions

Cited by 607 publications

References 48 publications

Bio‐Inspired Leaf‐Mimicking Nanosheet/Nanotube Heterostructure as a Highly Efficient Oxygen Evolution Catalyst

Bio‐Inspired Leaf‐Mimicking Nanosheet/Nanotube Heterostructure as a Highly Efficient Oxygen Evolution Catalyst

Controlling the Active Sites of Sulfur‐Doped Carbon Nanotube–Graphene Nanolobes for Highly Efficient Oxygen Evolution and Reduction Catalysis

Design of Efficient Bifunctional Oxygen Reduction/Evolution Electrocatalyst: Recent Advances and Perspectives

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