期刊
SMALL
卷 18, 期 16, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.202106893
关键词
defects; hydrodeoxygenation; nitrogen; oxygen co-doped; porous carbon nanospheres; selective hydrogenation; vanillin
类别
资金
- National Natural Science Foundation of China [21574042]
- Fundamental Research Funds for the Central Universities [40500-20104-222047]
Selective hydrogenation and hydrodeoxygenation of biomass to value-added products is a crucial step in the development of renewable energy resources. In this study, nitrogen/oxygen co-doped porous carbon nanospheres were used as the host matrix to encapsulate highly dispersed Pd nanoparticles, resulting in a catalyst that exhibited excellent catalytic activity and temperature-controlled selectivity for the hydrogenation and hydrodeoxygenation of vanillin derived from biomass.
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.
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