Publications by authors named "Eduard Garrido Ribo"
Article Synopsis
- High oxidation state metal cations like niobium play a significant role in carbon dioxide capture through chemisorption and catalysis, providing basic oxygens that aid in CO binding and release.
- The study focuses on aqueous niobium polyoxometalates, specifically their ability to interact with CO, leading to the formation of Nb-carbonate compounds that enhance CO capture efficiency.
- Results show that the type of counter cations influences the stability and efficacy of Nb structures for CO capture, with potassium yielding optimal performance at the air-water interface while demonstrating the ability to manipulate POM speciation using gas stimuli.
Article Synopsis
- Direct air capture (DAC) of CO2 is essential to mitigate global climate change, and research is focused on various materials, particularly alkaline inorganic metal oxides that create carbonates.
- This study investigates early d-transition metal peroxides, specifically tetraperoxovanadates, exploring their conversion pathways to produce CO-capturing compounds through various experimental techniques, including X-ray crystallography and spectrometry.
- The reactions are influenced by the type of alkali metal used, affecting both the stability and efficiency of CO capture, revealing that while heavier alkalis enhance capture speed, they don't necessarily improve the total amount of CO captured.
The assembly of nanoscale polyoxometalate (POM) clusters has been dominated by the highly reduced icosahedral {Mo } "browns" and the toroidal {Mo } "blues" which are 45 % and 18 % reduced, respectively. We hypothesised that there is space for a greater diversity of structures in this immediate reduction zone. Here we show it is possible to make highly reduced mix-valence POMs by presenting new classes of polyoxomolybdates: [Mo Mo H O ] {Mo } and [Mo Mo H O ] {Mo }, 81 % and 57 % reduced, respectively.
View Article and Find Full Text PDFThe precise control over the formation of complex nanostructures, polyoxometalates (POMs), at the sub-nanoscale is challenging but critical if non-covalent architectures are to be designed. Combining biologically-evolved systems with inorganic nanostructures could lead to sequence-mediated assembly. Herein, we exploit oligopeptides as multidentate structure-directing ligands metal-coordination and hydrogen bonded interactions to modulate the self-assembly of POM superstructures.
View Article and Find Full Text PDFPolyoxometalate molybdenum blue (MB) complexes typically exist as discrete multianionic clusters and are composed of repeating Mo building units. MB wheels such as {Mo} and {Mo} are made from pentagon-centered {Mo} building blocks joined by equal number of {Mo} units as loin, and {Mo} dimer units as skirt along the ring edge, with the ring sizes of the MB wheels modulated by the {Mo} units. Herein we report a new class of contracted lanthanide-doped MB structures that have replaced all the {Mo} units with lanthanide ions on the inner rim, giving the general formula {MoLn}.
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