Alkyne Semihydrogenation over Pd Nanoparticles Embedded in N,S-Doped Carbon Nanosheets

作者：Long Feng, Wenxiu Yang, Yimiao Hou, Zhiyi Sun, Yaning Hu, Xiaoyan Li, Xuemin Hu, Shuo Zhang, Shuo Wang, Wenxing Chen · 发表于：ACS Applied Nano Materials · 年份：2021 · DOI：10.1021/acsanm.1c01643 · 被引用次数：16 · 研究领域：MXene and MAX Phase Materials、Electrocatalysts for Energy Conversion、Supercapacitor Materials and Fabrication

A strategy using biological materials to prepare N,S-doped carbon covering Pd nanoparticles (Pd/N,S-C) from natural silk fibroin was developed. Wet chemical reduction and carbonization were used to synthesize the Pd/N,S-C catalyst. The as-prepared catalyst showed high activity (>99%) with satisfactory selectivity (86–99%) for semihydrogenation of varied alkynes to corresponding alkenes. In addition, this work also demonstrated that the PdC x species disappeared and the effect of electron transfer between Pd and N,S-C enhanced when Pd/N,S-F (N,S-doped silk fibroin covering Pd nanocrystals) was calcined to form Pd/N,S-C, which was beneficial to improve its performance for hydrogenation. Meanwhile, the increase of specific surface area after carbonization and the embedded structure could also improve the catalytic activity of Pd/N,S-C and stereoselectivity to cis -alkenes.