Turning on ambient conditions hydrodeoxygenation of biobased aromatic alcohols through teaming 2D Pd (111) and P-coated carbon

Abstract

The ambient conditions HDO process is always expected to achieve economically viable conversions, it is of great significance to humans, but it remains a huge challenge. Herein, for the first time, a strategy for normal-temperature and pressure hydrodeoxygenation of biobased aromatic alcohols through teaming 2D Pd (111) and P-coated carbon was proposed for chemoselective HDO of various aromatic alcohols with excellent performance under normal conditions (20 °C, 1.0 bar H₂). The C-OH bonds were selectively cleaved while leaving the aromatic moiety intact, and conversions for the targeted compounds exceeding 99.9 % in most cases. Furthermore, we confirmed satisfactory reusability of the 3Pd(111)/AC-P catalyst, being used in up to ten consecutive cycles without significant loss of activity or selectivity significantly. The pronounced effect on the HDO performance is primarily attributed to the synergistic effect for the Pd⁰-Pd^δ+-P species, which enhance the ability of the alcohol hydroxyl group to break under normal temperature and pressure conditions. This work paves the way for efficient and selective HDO reactions of aromatic alcohols under normal condition by utilizing effective palladium facet catalysts.