Selective hydrogenation and hydrodeoxygenation (HDO) of biomass to value‐added products play a crucial role in the development of renewable energy resources. However, achieving a temperature‐controlled selectivity within one catalytic system while retaining excellent hydrogenation and HDO performance remains a great challenge. Here, nitrogen/oxygen (N/O) co‐doped porous carbon nanosphere derived from resin polymer spheres is synthesized as the host matrix to in situ encapsulate highly dispersed Pd nanoparticles (NPs). Through N/O co‐doping, the defects on the surface of carbon structure can serve as active sites to promote substrate adsorption. After a facile H2O2 post‐treatment process, the presence of abundant carboxyl groups on the porous carbon nanospheres can act as acidic sites to replace the use of acidic additives in the HDO process. Additionally, the increased surface oxygen‐containing groups improve hydrophilicity to disperse catalysts in aqueous solutions. Owing to the unique highly dispersed Pd NPs and abundant surface defects, the Pd@APF‐H2O2 (2.3 nm) catalysts exhibit excellent catalytic activity and temperature‐controlled selectivity for hydrogenation and HDO products of biomass‐derived vanillin.

No abstract

No abstract

The development of metal nanoparticles (MNPs) loaded on porous materials with high efficiency and stability is significant importance for heterogeneous catalysis. Herein, ultrafine Au NPs are prepared and anchored on hollow porous organic nanospheres (Au@HPONs) with polylactide-b-poly(4-vinylpyridine)-b-polystyrene (PLA-b-P4VP-b-PS) triblock copolymers as precursors and pyridine as the coordination group. In this strategy, pyridine functional groups can coordinate with the Au NPs and uniformly disperse them in the carrier. Due to its hollow porous structure, high specific surface area, and physicochemical stability, the obtained Au@HPONs nanocomposite shows excellent catalytic performance and cycling ability for the oxidation of benzyl alcohol and the reduction of 4-nitrophenol.

No abstract