Cobalt oxide
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To Be or Not To Be Pseudocapacitive? Open
International audience
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Future material demand for automotive lithium-based batteries Open
The world is shifting to electric vehicles to mitigate climate change. Here, we quantify the future demand for key battery materials, considering potential electric vehicle fleet and battery chemistry developments as well as second-use and…
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Phase and composition controllable synthesis of cobalt manganese spinel nanoparticles towards efficient oxygen electrocatalysis Open
Spinel-type oxides are technologically important in many fields, including electronics, magnetism, catalysis and electrochemical energy storage and conversion. Typically, these materials are prepared by conventional ceramic routes that are…
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Mesoporous Transition Metal Oxides for Supercapacitors Open
Recently, transition metal oxides, such as ruthenium oxide (RuO2), manganese dioxide (MnO2), nickel oxides (NiO) and cobalt oxide (Co3O4), have been widely investigated as electrode materials for pseudo-capacitors. In particular, these met…
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Mechanistic Aspects of deNO<sub><i>x</i></sub> Processing over TiO<sub>2</sub> Supported Co–Mn Oxide Catalysts: Structure–Activity Relationships and In Situ DRIFTs Analysis Open
Anatase TiO2-supported manganese and cobalt oxide catalysts with different Co/Mn molar ratios were synthesized by a conventional impregnation method and used for selective catalytic reduction (SCR) of NOx with NH3. The catalysts were chara…
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Boosting hydrogen evolution on MoS2 via co-confining selenium in surface and cobalt in inner layer Open
The lack of highly efficient, inexpensive catalysts severely hinders large-scale application of electrochemical hydrogen evolution reaction (HER) for producing hydrogen. MoS 2 as a low-cost candidate suffers from low catalytic performance.…
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Electrochemical surface passivation of LiCoO2 particles at ultrahigh voltage and its applications in lithium-based batteries Open
Lithium cobalt oxide, as a popular cathode in portable devices, delivers only half of its theoretical capacity in commercial lithium-ion batteries. When increasing the cut-off voltage to release more capacity, solubilization of cobalt in t…
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Solvometallurgical recovery of cobalt from lithium-ion battery cathode materials using deep-eutectic solvents Open
Solvometallurgical recovery of cobalt from lithium cobalt oxide by using a choline chloride–citric acid deep eutectic solvent (DES) in presence of aluminium and copper current collectors.
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Engineering High‐Spin State Cobalt Cations in Spinel Zinc Cobalt Oxide for Spin Channel Propagation and Active Site Enhancement in Water Oxidation Open
Spinel zinc cobalt oxide (ZnCo 2 O 4 ) is not considered as a superior catalyst for the electrochemical oxygen evolution reaction (OER), which is the bottleneck reaction in water‐electrolysis. Herein, taking advantage of density functional…
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Surface‐Confined Fabrication of Ultrathin Nickel Cobalt‐Layered Double Hydroxide Nanosheets for High‐Performance Supercapacitors Open
The design and fabrication of 2D nanostructure electrodes with desired electrochemical activities is highly demanded for electrocatalysis and supercapacitors. Herein, the tuned fabrication of ultrathin and tortuous nickel/cobalt‐layered do…
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Toward a cell‐chemistry specific life cycle assessment of lithium‐ion battery recycling processes Open
On the basis of a review of existing life cycle assessment studies on lithium‐ion battery recycling, we parametrize process models of state‐of‐the‐art pyrometallurgical and hydrometallurgical recycling, enabling their application to differ…
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Cobalt oxide and N-doped carbon nanosheets derived from a single two-dimensional metal–organic framework precursor and their application in flexible asymmetric supercapacitors Open
A single metal–organic framework precursor is transformed into both electrodes (Co3O4 and N-doped carbon) for a flexible asymmetric supercapacitor.
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Operando Insights into CO Oxidation on Cobalt Oxide Catalysts by NAP-XPS, FTIR, and XRD Open
Cobalt oxide Co3O4 has recently emerged as promising, noble metal-free catalyst for oxidation reactions but a better understanding of the active catalyst under working conditions is required for further development and potential commercial…
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Sulfur‐Modified Oxygen Vacancies in Iron–Cobalt Oxide Nanosheets: Enabling Extremely High Activity of the Oxygen Evolution Reaction to Achieve the Industrial Water Splitting Benchmark Open
The oxygen vacancies of defective iron–cobalt oxide (FeCoO x ‐Vo) nanosheets are modified by the homogeneously distributed sulfur (S) atoms. S atoms can not only effectively stabilize oxygen vacancies (Vo), but also form the Co−S coordinat…
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Cobalt-Based Nitride-Core Oxide-Shell Oxygen Reduction Electrocatalysts Open
Developing high-performance, low-cost, and conductive nonprecious electrocatalysts for the oxygen reduction reaction (ORR) has been a key challenge for advancing fuel cell technologies. Here, we report on a novel family of cobalt nitrides …
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Nickel cobalt oxide hollow nanosponges as advanced electrocatalysts for the oxygen evolution reaction Open
Nickel cobalt oxide hollow nanosponges were synthesized through a kinetically controlled strategy, which exhibited excellent catalytic activity towards oxygen evolution reaction.
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Morphological and Structural Evolution of Co<sub>3</sub>O<sub>4</sub> Nanoparticles Revealed by <i>in Situ</i> Electrochemical Transmission Electron Microscopy during Electrocatalytic Water Oxidation Open
Unveiling the mechanism of electrocatalytic processes is fundamental for the search of more efficient and stable electrode materials for clean energy conversion devices. Although several in situ techniques are now available to track struct…
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Physical properties, biological applications and biocompatibility studies on biosynthesized single phase cobalt oxide (Co3O4) nanoparticles via Sageretia thea (Osbeck.) Open
Cobalt oxide nanoparticles were successfully biosynthesized by complete green process using aqueous leaf extracts of Sageretia thea as chelating agent. Diverse techniques were applied for characterization. Antibacterial (with and without U…
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Uncovering the prominent role of metal ions in octahedral versus tetrahedral sites of cobalt–zinc oxide catalysts for efficient oxidation of water Open
The tremendous impact of tetrahedralversusoctahedral metal sites on the superior electrocatalytic performance of ZnCo2O4for the oxygen evolution reaction has been elucidated through comprehensive analysis of bulk and near-surface structure…
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Study of structural, optical and magnetic properties of cobalt doped ZnO nanorods Open
Cobalt doped zinc oxide nanoparticles (NPs) and nanorods (NRs) were synthesized by a simple chemical method.
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High‐Performance Flexible Quasi‐Solid‐State Supercapacitors Realized by Molybdenum Dioxide@Nitrogen‐Doped Carbon and Copper Cobalt Sulfide Tubular Nanostructures Open
Flexible quasi‐/all‐solid‐state supercapacitors have elicited scientific attention to fulfill the explosive demand for portable and wearable electronic devices. However, the use of electrode materials faces several challenges, such as intr…
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Characterization of Cobalt Oxide Nanoparticles Prepared by the Thermal Decomposition Open
In this work, thermal decomposition of the [Co(NH3)5(H2O)](NO3)3 precursor complex was investigated under solid state conditions. Thermal analysis (TG/DTA) showed that the complexwas easily decomposed into the Co3O4 nanoparticles at low te…
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In Situ Grown Co‐Based Interstitial Compounds: Non‐3d Metal and Non‐Metal Dual Modulation Boosts Alkaline and Acidic Hydrogen Electrocatalysis Open
Interfacial engineering and elemental doping are the two parameters to enhance the catalytic behavior of cobalt nitrides for the alkaline hydrogen evolution reaction (HER). However, simultaneously combining these two parameters to improve …
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Graphene oxide/core–shell structured metal–organic framework nano-sandwiches and their derived cobalt/N-doped carbon nanosheets for oxygen reduction reactions Open
A metal–organic framework (MOF) seed-mediated deposition route is developed to synthesize graphene oxide/core–shell structured MOF nano-sandwiches.
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Oxygen‐Deficient Cobalt‐Based Oxides for Electrocatalytic Water Splitting Open
An apparent increased interest has been recently devoted towards the previously untrodden path for anionic point defect engineering of electrocatalytic surfaces. The role of vacancy engineering in improving photo‐ and electrocatalytic acti…
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Atomically Precise Growth of Catalytically Active Cobalt Sulfide on Flat Surfaces and within a Metal–Organic Framework <i>via</i> Atomic Layer Deposition Open
Atomic layer deposition (ALD) has been employed as a new synthetic route to thin films of cobalt sulfide on silicon and fluorine-doped tin oxide platforms. The self-limiting nature of the stepwise synthesis is established through growth ra…
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High-performance hybrid oxide catalyst of manganese and cobalt for low-pressure methanol synthesis Open
Carbon dioxide capture and use as a carbon feedstock presents both environmental and industrial benefits. Here we report the discovery of a hybrid oxide catalyst comprising manganese oxide nanoparticles supported on mesoporous spinel cobal…
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Highly dispersive Co<sub>3</sub>O<sub>4</sub>nanoparticles incorporated into a cellulose nanofiber for a high-performance flexible supercapacitor Open
Transition metal oxides used as electrode materials for flexible supercapacitors have attracted huge attention due to their high specific capacitance and surface-to-volume ratio, specifically for cobalt oxide (Co3O4) nanoparticles.
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In‐Depth Analysis of the Degradation Mechanisms of High‐Nickel, Low/No‐Cobalt Layered Oxide Cathodes for Lithium‐Ion Batteries Open
A rational compositional design of high‐nickel, cobalt‐free layered oxide materials for high‐energy and low‐cost lithium‐ion batteries would be expected to further propel the widespread adoption of electric vehicles (EVs), yet a compositio…
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Effect of the Oxide–Carbon Heterointerface on the Activity of Co<sub>3</sub>O<sub>4</sub>/NRGO Nanocomposites toward ORR and OER Open
This work reports\nthe synthesis of Co3O4 particles\nthat can be used as effective electrode materials for both the oxygen\nreduction (ORR) and evolution (OER) reactions. The development of\nsuch catalysts, free from precious group metals …