Attraction in Action: Reduction of Water to Dihydrogen Using Surface-Functionalized TiO2 Nanoparticles

The reactivity of a heterogeneous rhodium(III) and ruthenium(II) complex-functionalized TiO2 nanoparticle (NP) system is reported. The ruthenium and rhodium metal complexes work in tandem on the TiO2 NPs surface to generate H2 through water reduction under simulated and normal sunlight irradiation....

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Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2022-02, Vol.12 (5), p.789
Main Authors: Freimann, Sven A., Housecroft, Catherine E., Constable, Edwin C.
Format: Article
Language:English
Subjects:
Absorption spectroscopy
anchored-catalyst
Catalysts
Cooling
Coordination compounds
Energy
Gas chromatography
heterogeneous catalysis
Irradiation
Ligands
Magnetic resonance spectroscopy
Mass spectrometry
Metal complexes
Nanoparticles
NMR
NMR spectroscopy
Nuclear magnetic resonance
Photocatalysis
Radiation
Reaction kinetics
Recyclability
Rhodium
Ruthenium
Ruthenium compounds
Scientific imaging
Titanium dioxide
water reduction
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Summary:The reactivity of a heterogeneous rhodium(III) and ruthenium(II) complex-functionalized TiO2 nanoparticle (NP) system is reported. The ruthenium and rhodium metal complexes work in tandem on the TiO2 NPs surface to generate H2 through water reduction under simulated and normal sunlight irradiation. The functionalized TiO2 NPs outperformed previously reported homogeneous systems in turnover number (TON) and frequency (TOF). The influence of individual components within the system, such as pH, additive, and catalyst, were tested. The NP material was characterized using TGA-MS, 1H NMR spectroscopy, FTIR spectroscopy, solid absorption spectroscopy, and ICP-MS. Gas chromatography was used to determine the reaction kinetics and recyclability of the NP-supported photocatalyst.
ISSN:2079-4991
2079-4991
DOI:10.3390/nano12050789