Surfactant encapsulated palladium-polyoxometalates: controlled assembly and their application as single-atom catalysts

Abstract

Two kinds of assembly structures (nanorolls and hollow spindles) based on the palladium substituted Wells–Dawson polyoxometalate (Pd-POM) were synthesised and showed high catalytic activity for both the Suzuki–Miyaura coupling reaction and semihydrogenation reaction.

Stabilizing a Platinum1 Single‐Atom Catalyst on Supported Phosphomolybdic Acid without Compromising Hydrogenation Activity

“…[5] Ac lose inspection of these compounds reveals that many of them are four-coordinate complexes containing ametal with asquareplanar or tetrahedral coordination geometry,s tates that are intrinsically more stable.I nspired by this,w ee nvisioned construction or introduction of four-coordinate anchoring sites with suitable geometry,thereby achieving ahigh loading of stable SACs on as upport. [6] Studies in which inorganic metal salts or organometallic complexes are anchored to prepare small metal nanoparticles and nanoclusters (2-4 nm) are also described. PMA has ac lassical Keggin structure with one Pa tom in the center that is caged by 12 octahedral MoO 6 -units linked together by 24 bridging oxygen atoms (O br ).…”

Jenseits von Ladungsausgleich: Gegenkationen in der Polyoxometallat‐Chemie

“…Die Gruppe von Wang kombinierte Wells‐Dawson‐POMs und funktionalisierte Derivate ([P 2 W 18 O 62 ] 6− und [Pd 2 (P 2 W 17 O 61 ) 2 ] 8− ) mit TBA und CTA, um daraus “Nanoröllchen”, wie durch TEM gezeigt, herzustellen. NMR‐Studien zeigten, dass TBA und CTA in einem 1:1‐Verhältnis in den Röllchen auftreten.…”

“…Die Autoren denken, dass die Bildung gekrümmter Schichten zur Nanoröllchenbildung führt. Zudem konnten die Strukturen postfunktionalisiert und polymerisiert werden, um rigide Materialien zu bilden, und können zudem in der Katalyse eingesetzt werden …”

Heteropoly acids triggered self-assembly of cationic peptides into photo- and electro-chromic gels

“…52,53 More importantly, POMs showed high fatigue resistance and excellent photo and electro stability, which made them potential candidates for the development of smart materials and devices. [57][58][59][60][61][62] POMs contain heteroatoms as centre and protons as their cations are also called heteropoly acids (HPAs), which not only carry the inherent physicochemical properties of POMs but also show distinctively strong acidity and adaptive solubility in oxygen containing organic solvents. [57][58][59][60][61][62] POMs contain heteroatoms as centre and protons as their cations are also called heteropoly acids (HPAs), which not only carry the inherent physicochemical properties of POMs but also show distinctively strong acidity and adaptive solubility in oxygen containing organic solvents.…”