Tuning Brønsted and Lewis acidity on phosphated titanium dioxides for efficient conversion of glucose to 5-hydroxymethylfurfural

Tunable Lewis and Brønsted acid sites on P–TiO2 tandem catalysts for glucose-to-HMF conversion providing high HMF yield (72%) and selectivity (83%).

On the location of Lewis acidic aluminum in zeolite mordenite and the role of framework-associated aluminum in mediating the switch between Brønsted and Lewis acidity

Framework-associated aluminum is demonstrated to facilitate a reversible switch between Lewis and Brønsted acidity in zeolites with the Lewis acid sites preferentially populating the side-pockets in the case of mordenite.

Dehydrative etherification of carbohydrates to 5-ethoxymethylfurfural over SBA-15-supported Sn-modified heteropolysilicate catalysts

Introduction of Sn into heteropoly silicate led to generate Lewis acidity. Conversion of carbohydrates to EMF requires both Brønsted and Lewis acidity to yield more EMF. The activity increased with increase in Lewis acidity of the Sn0.75STA/SBA-15 catalysts.