Improving Oxidative Catalytic Efficiency for Fuels Desulfurization Using Hybrid Materials Based in MOF‐808@SBA‐15

• Published in: ChemCatChem Vol. 16; no. 16
• Main Authors: Fernandes, Simone C., Leo, Pedro, Santos‐Vieira, Isabel, Castro, Baltazar, Cunha‐Silva, Luís, Balula, Salete S.
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley Subscription Services, Inc 26-08-2024
• Subjects: Catalysts; Desulfurizing; mesoporous silicas; metal-organic frameworks; oxidative desulfurization; Phosphomolybdic acid; polyoxometalates; Polyoxometallates; sustainable catalysis
• ISSN: 1867-3880; 1867-3899
• DOI: 10.1002/cctc.202400355

This work unveils a route for a new generation of heterogeneous polyoxometalate (POMs) based catalysts associated to the preparation of hybrid materials as a triad of POMs, mesoporous silica (SBA‐15) and microporous MOF structures (MOF‐808). The prepared catalyst, PMo12@MOF‐808@SBA‐15, with the main active center the phosphomolybdic acid (PMo12), was successfully applied for the desulfurization of a multicomponent fuel. Its oxidative catalytic performance showed to be considerable superior to the isolated POM@MOF and able to be recycled for more catalytic cycles without active loss. The higher catalytic performance seems to be directly related with the preparation of a more amorphous MOF structure within the channels of SBA‐15, in the presence of active POM guests.
An unprecedented tri‐hybrid material, PMo12@MOF‐808@SBA‐15, revealed a notable catalytic performance and robustness to desulfurize a multicomponent model fuel containing approximately 1500 ppm of sulfur. It demonstrated an enhanced activity and recyclability relatively to the parent's composites, PMo12@MOF‐808 and PMo12@SBA‐15.