| 초록 |
The size controlled Ni nanoparticles were synthesized in the presence of organic surface capping agents. The organic molecules were strongly adsorbed on Ni surface and acted as ligands. They were used to selective hydrogenation of unsaturated furanic aldehydes to their corresponding alcohols. The 6.8 nm capped Ni nanoparticles showed the highest yield of unsaturated furanic alcohols. In the case of selective hydrogenation of furfural (FFR), the 6.8 nm capped Ni nanoparticles showed a high furfuryl alcohol (FFA) yield of 96%. Whereas, significant over-hydrogenation was occurred over uncapped (clean surface) Ni/SiO2 with similar sized Ni nanoparticles. The steric hindrance of the organic ligands led to selective hydrogenation of FFR to FFA. The capped Ni nanoparticles could be reused repeatedly without any significant loss of catalytic activity and selectivity. They also catalyzed the selective hydrogenation of other unsaturated furanic aldehydes to unsaturated furanic alcohols with high selectivity (> 90%). |
