Year: 2025
Type: article
Abstract: Photocatalysis provides a sustainable approach for on‐site production of H 2 O 2 , yet single‐phase systems generally display unsatisfactory efficiency and low concentration of H 2 O 2 due to rapid reverse reactions and dissociation of H 2 O 2 . Multiphase systems are developed to yield aqueous H 2 O 2 via oxygen reduction by employing hydrophobic photocatalysts, however, the low solubility of oxygen and the possible dissociation of generated H 2 O 2 result in a limited improvement in catalytic performances. Herein, a lauric acid (LA)‒ n ‐dodecyltrimethoxysilane (DTMS) dual‐emulsifier coated Pd/TiO 2 (LD‐Pd/TiO 2 ) is constructed for the synthesis of H 2 O 2 in a water‐nonane system via water oxidation with quintozene as an insoluble hydrogen acceptor in water. While DTMS in the composite coating quenches the decomposition of H 2 O 2 , LA facilitates the enrichment of quintozene near the Pd/TiO 2 for a rapid consumption of hydrogen atoms. The LD‐Pd/TiO 2 leads to a remarkable H 2 O 2 concentration of 133 mM with decent stability and a high quantum efficiency (6.5% at 365 nm). Additionally, the system can be demulsified gently after reaction, obtaining aqueous H 2 O 2 solution and oil phase with hydrogenated products for simple separation and collection.
Source: Advanced Science
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $6,730
Awards: G7909568073, G8445440409
OpenAlex ID: W4415619996