| 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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Wark, Michael
Institute of Physical Chemistry
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (26/26 displayed)
- 2024A sustainable CVD approach for ZrN as a potential catalyst for nitrogen reduction reaction
- 2024Influence of Annealing Temperature on the OER Activity of NiO(111) Nanosheets Prepared via Microwave and Solvothermal Synthesis Approachescitations
- 2024Effect of Non-ionic Surfactant on Fe-N-C Catalyst Layers under HT-PEMFC Conditions
- 2024Benchmark of J55 and X56 steels on cracking and corrosion effects under hydrogen salt cavern boundary conditionscitations
- 2023How Effective Is Graphitization of Biomasses for the Carbon Stability of Pt/C ORR Catalysts?citations
- 2023Sol gel synthesis of defect-pyrochlore structured CsTaWO6 and the tribochemical influences on photocatalytic activity
- 2023Impact of the Water Management on the Performance Stability of Polyimidazolium-based (Aemion+®) Anion Exchange Membrane Fuel Cells
- 2021Chemical Vapor Deposition of Cobalt and Nickel Ferrite Thin Films:Investigation of Structure and Pseudocapacitive Propertiescitations
- 2021In Situ Synthesis of Co 3 O 4 /CoFe 2 O 4 Derived from a Metal–Organic Framework on Nickel Foam: High-Performance Electrocatalyst for Water Oxidationcitations
- 2021Chemical vapor deposition of cobalt and nickel ferrite thin films
- 2021Chemical Vapor Deposition of Cobalt and Nickel Ferrite Thin Films: Investigation of Structure and Pseudocapacitive Propertiescitations
- 2020Correction: Micro-spectroscopy of HKUST-1 metal–organic framework crystals loaded with tetracyanoquinodimethane: effects of water on host–guest chemistry and electrical conductivity
- 2019Micro-spectroscopy of HKUST-1 metal-organic framework crystals loaded with tetracyanoquinodimethane: effects of water on host-guest chemistry and electrical conductivitycitations
- 2019Micro-spectroscopy of HKUST-1 metal-organic framework crystals loaded with tetracyanoquinodimethane: effects of water on host-guest chemistry and electrical conductivity
- 2018Scale-up of the electrodeposition of ZnO/Eosin Y hybrid thin films for the fabrication of flexible dye-sensitized solar cell modulescitations
- 2017Microwave-Assisted Synthesis of Perovskite SrSnO3 Nanocrystals in Ionic Liquids for Photocatalytic Applicationscitations
- 2017Photoelectrochemical and theoretical investigations of spinel type ferrites (MxFe3-xO4) for water splitting: A mini-review
- 2015New insight into calcium tantalate nanocomposite photocatalysts for overall water splitting and reforming of alcohols and biomass derivativescitations
- 2015Research Update: Photoelectrochemical water splitting and photocatalytic hydrogen production using ferrites (MFe2O4) under visible light irradiation
- 2015Low-temperature route to metal titanate perovskite nanoparticles for photocatalytic applicationscitations
- 2015Low-temperature route to metal titanate perovskite nanoparticles for photocatalytic applications
- 2015CNT-TiO(_{2-delta}) composites for improved co-catalyst dispersion and stabilized photocatalytic hydrogen production
- 2013Sol–gel synthesis of defect-pyrochlore structured CsTaWO6 and the tribochemical influences on photocatalytic activitycitations
- 2011Mesoporous tin-doped indium oxide thin films: Effect of mesostructure on electrical conductivity
- 2011Multilayered ordered mesoporous platinum/titania composite films: does the photocatalytic activity benefit from the film thickness?citations
- 2008Development of polyoxadiazole nanocomposites for high temperature polymer electrolyte membrane fuel cellscitations
Places of action
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article
Micro-spectroscopy of HKUST-1 metal-organic framework crystals loaded with tetracyanoquinodimethane: effects of water on host-guest chemistry and electrical conductivity
Abstract
Composite materials, consisting of a metal–organic framework (MOF) and a guest molecule, further denoted as guest@MOF composites, have gained strong interest due to the guest-induced tunability of the host properties, for example in sensing or electroconductivity applications. However, decoding the complexity of these guest@MOF composites and extracting structure-performance relationships are far from trivial and require the use of a gamut of characterization tools. In this work, we use various micro-spectroscopic tools both under static (ex situ) and dynamic (in situ) conditions to map the properties and diffusion behavior of TCNQ (7,7,8,8-tetracyanoquinodimethane) as a guest molecule in single HKUST-1 crystals as the host. Raman micro-spectroscopy allowed us to map the spatial distribution of TCNQ within HKUST-1 single crystals, thereby revealing a heterogeneous distribution of TCNQ after initial TCNQ-infiltration, concentrated at the crystal edges, and a homogeneous redistribution upon water vapor treatment. These insights are correlated to I–V scans at different temperatures and to electrochemical impedance spectroscopy (EIS), which allowed us to verify the different contributions to conductivity. These data showed changes in electrical conductivity after exposing the sample to moisture and air. In situ FT-IR micro-spectroscopy during treatment with moisturized nitrogen gas suggests lower transient diffusion rates for water inside TCNQ@HKUST-1 relative to pristine HKUST-1, likely due to steric hindrance of the pore-filling TCNQ molecules in the HKUST-1 framework. The application of micro-spectroscopic techniques is crucial to uncovering MOF intracrystal heterogeneities and yielding rationally-derived instructions for the improved design of guest@MOF systems.