| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Putaux, Jean-Luc
French National Centre for Scientific Research
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (24/24 displayed)
- 2023Valorization of olive leaf waste as a new source of fractions containing cellulose nanomaterialscitations
- 2023Lignin-Containing Cellulose Nanofibrils from TEMPO-Mediated Oxidation of Date Palm Waste: Preparation, Characterization, and Reinforcing Potentialcitations
- 2023Enhancing mechanical and thermal properties of plasticized poly-L-(lactic acid) by incorporating aminated-cellulose nanocrystalscitations
- 2022Lignin-Containing Cellulose Nanofibrils from TEMPO-Mediated Oxidation of Date Palm Waste: Preparation, Characterization, and Reinforcing Potentialcitations
- 2022Opportunities for Ivory Nut Residue Valorization as a Source of Nanocellulose Colloidal Suspensionscitations
- 2021A cobalt oxide–polypyrrole nanocomposite as an efficient and stable electrode material for electrocatalytic water oxidationcitations
- 2021Honeycomb Organization of Chitin Nanocrystals (ChNCs) in Nanocomposite Films of UV-Cured Waterborne Acrylated Epoxidized Soybean Oil Emulsified with ChNCscitations
- 2020Vinyltriethoxysilane-functionalized starch nanocrystals as Pickering stabilizer in emulsion polymerization of acrylic monomers. Application in nanocomposites and pressure-sensitive adhesivescitations
- 2020One-step processing of plasticized starch/cellulose nanofibrils nanocomposites via twin-screw extrusion of starch and cellulose fiberscitations
- 2019Hybrid nanocellulose decorated with silver nanoparticles as reinforcing filler with antibacterial propertiescitations
- 2019Microstructural and mechanical properties of biocomposites made of native starch granules and wood fiberscitations
- 2019In Vitro Synthesis and Crystallization of β-1,4-Mannancitations
- 2018Nickel oxide–polypyrrole nanocomposite electrode materials for electrocatalytic water oxidationcitations
- 2018Nickel oxide–polypyrrole nanocomposite electrode materials for electrocatalytic water oxidationcitations
- 2016Mechanical properties of natural rubber nanocomposites reinforced with high aspect ratio cellulose nanocrystals isolated from soy hullscitations
- 2015Forming Of Native Starch/Wood Composites
- 2015Fine microstructure of processed chitosan nanofibril networks preserving directional packing and high molecular weightcitations
- 2012Reorientation of cellulose nanowhiskers in agarose hydrogels under tensile loadingcitations
- 2010Synthesis of oily core-hybrid shell nanocapsules through interfacial free radical copolymerization in miniemulsion: droplet formation and nucleation
- 2010A-Type Crystals from Dilute Solutions of Short Amylose Chainscitations
- 2009In vitro model assemblies to study the impact of lignin-carbohydrate interactions on the enzymatic conversion of Xylancitations
- 2007Designing organic/inorganic colloids by heterophase polymerizationcitations
- 2004Filler-filler interactions and viscoelastic behavior of polymer nanocompositescitations
- 2004Preparation of aqueous anionic poly-(urethane-urea) dispersions: Influence of the nature and proportion of the urethane groups on the dispersion and polymer propertiescitations
Places of action
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article
A cobalt oxide–polypyrrole nanocomposite as an efficient and stable electrode material for electrocatalytic water oxidation
Abstract
International audience ; Developing electrolyzers operating under neutral or near-neutral conditions with catalysts based only on earth-abundant metals is highly desirable with a view to reduce the cost of hydrogen production from water splitting reaction and avoid the environmental issues related to corrosion usually encountered with alkaline electrolyzers. Herein, we report a highly active and stable anode material for oxygen evolving reaction (OER) in mild-pH conditions based on cobalt oxide-nanoparticles embedded into a poly(pyrrole-alkylammonium) matrix (denoted PPN+-CoOx). Examples of hybrid materials combining metal oxide nanoparticles as OER catalysts within a polymer film are still rare. However, they are very promising to control the formation and the size of metal particles in view to enhance the electrochemically active surface area and thus the electrocatalytic performances. Our strategy consists in electroprecipitating Co0 nanoparticles by reduction of an anionic cobalt oxalate complex into the cationic PPN+ film, the latter being previously deposited onto an electrode surface by electropolymerization. The Co0 nanoparticles within the composite are then partially in-situ oxidized under air exposure into CoO, and then finally fully oxidized into CoOx by successive scans between 0 and 1.2 V vs Ag/AgCl in a borate buffer at pH 9.2. This nanocomposite material is highly structured with around 30 nm-large CoOx nanoparticles well dispersed into the polypyrrole film conferring a high OER electrocatalytic activity at near neutral pH of 9.2 with exceptional values of mass activity and turnover frequency of 3.01 A mg-1 and 0.46 s-1 respectively, at an overpotential of 0.61 V and with a cobalt loading of 1.34 µg cm-2. These performances place the PPN+-CoOx electrode among the most active anodes described in the literature employing cobalt oxide under mild pH conditions. In addition, when the PPN+-CoOx material is electrodeposited on carbon paper with a higher roughness than a simple carbon electrode, the ...