| 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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Balula, Ss
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (7/7 displayed)
- 2022Unveiling the structural transformations of the PW11Co@ZIF-67 nanocomposite induced by thermal treatmentcitations
- 2020Advanced framework-modified POM@ZIF-67 nanocomposites as enhanced oxygen evolution reaction electrocatalystscitations
- 2020Oxygen Evolution Reaction Electrocatalytic Improvement in POM@ZIF Nanocomposites: A Bidirectional Synergistic Effectcitations
- 2014Novel polyoxometalate silica nano-sized spheres: efficient catalysts for olefin oxidation and the deep desulfurization processcitations
- 2013Novel Composite Material Polyoxovanadate@MIL-101(Cr): A Highly Efficient Electrocatalyst for Ascorbic Acid Oxidationcitations
- 2013Europium Polyoxometalates Encapsulated in Silica Nanoparticles Characterization and Photoluminescence Studiescitations
- 2012Hybrid layer-by-layer films based on lanthanide-bridged silicotungstates and poly(ethylenimine)citations
Places of action
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article
Oxygen Evolution Reaction Electrocatalytic Improvement in POM@ZIF Nanocomposites: A Bidirectional Synergistic Effect
Abstract
A bidirectional synergy involving Co-based polyoxometalates (POMs) incorporated in the Co-containing zeolitic imidazolate framework, ZIF-67, that promoted a notable improvement in the oxygen evolution reaction (OER) performance was unveiled for the first time. Two POM@ZIF nanocomposite materials-SiW9Co3@ZIF-8 and SiW9Co3@ZIF-67-were successfully prepared via a room temperature in situ approach, by the immobilization of POM anions [SiW9Co3(H2O)(3)O-37](10-)(SiW9Co3) in the cages of two isostructural ZIFs: ZIF-8 and ZIF-67, formed with Zn2+ and Co2+, respectively. Despite both SiW9Co3@ZIF-8 and SiW9Co3@ZIF-67 revealing similar and low occupancy degrees (ca. 6 POM units per 100 ZIF-cages), an intense synergy has been detected in the ZIF-67 based nanocomposite, while no synergistic interaction was found for POMs and ZIF-8. Due to this synergistic effect, the OER activity of SiW9Co3@ZIF-67 is significantly enhanced in comparison with that of ZIF-67: similar to 110 mV decreased overpotential and double current density. Additionally, this nanocomposite exhibits excellent stability in the alkaline electrolyte. Insights into the nature and magnitude of the SiW(9)Co(3)ZIF-67 synergy have shown up its interesting ZIF <-> POM bidirectional nature that involves activation of the Co-based active sites in POM clusters as a consequence of a ZIF-67 -> SiW9Co3 electron transfer, along with POM-induced generation of more active unsaturated Co-nodes in the ZIF-67 frameworks. These findings represent a promising proof of concept for the development of more efficient POM@MOF-based electrocatalysts in the future.