Developing two-dimensional solid superacids with enhanced mass transport, extremely high acid strength and superior catalytic performance

Abstract

2D hybrid solid superacids with extremely high acid strength and outstanding mass transfer properties were prepared and exhibit superior activities for biomass conversion.

Meso‐macroporous Carbons Decorated with Ample Nitrogen Sites as Bifunctional Catalysts in CO2 Catalytic Conversion and Oxygen Reduction Reaction

“…The morphology and micro‐nanostructures of 3D‐NHPC‐x were investigated by electron microscopic techniques (Figures 3 and 4). As shown in Figure 3, all 3D‐NHPC‐x reveal a graphene‐like 2D layered hierarchical structures, along with ample randomly aggregated and folded carbon nanosheets, consequently forming abundant and hierarchical meso‐ and macropores [56,57] . Meanwhile, the representative nanosheets appear as loose and soft agglomerates micrometer in size.…”

Functionalized Biochar with Superacidity and Hydrophobicity as a Highly Efficient Catalyst in the Synthesis of Renewable High-Density Fuels

“…The 31 P MAS NMR spectra of trimethylphosphine oxide over the acidic biochar are displayed in Figure C. − It is well known that a low-field observed 31 P chemical shift value represents a stronger acidic strength. Agreed with our previous work, 3.67 wt % B-SO 3 H-67° (75.0 ppm) shows a low chemical shift than that of Amberlyst-15 (81.0 ppm) and 4.94 wt % B-PhSO 3 H-57° (84.5 ppm).…”

Highly Efficient Alkylation Using Hydrophobic Sulfonic Acid-Functionalized Biochar as a Catalyst for Synthesis of High-Density Biofuels

“…The 31 P MAS NMR spectra of TEPO chemically adsorbed on the acid sites were used to determine the acidity of the functionalized biochar. − A higher acid strength can cause a larger 31 P chemical shift. As shown in Figure , the 31 P NMR spectra of 3.28wt%B-SO 3 H-67°, 7.88wt%B-PhSO 3 H-18°, 7.45wt%B-PhSO 3 H-110°, and Amberlyst-15 exhibit signals at 84.2, 86.3, 86.1, and 87.7 ppm, respectively.…”