Nitrogen-Functionalized Active Carbon-Supported Non-Noble Nickel Nanoparticles with High Dispersity and Enhanced Catalytic Performance in Nitro Naphthalene Hydrogenation

摘要

Nitrogen-functionalized active carbons were prepared by posttreatment method and used as supports for loading nickel to prepare liquid-phase hydrogenation catalysts. The post-treatment conditions were investigated, and these nitrogen-functionalized active carbons supported nickel catalysts were characterized and used in the nitro naphthalene compounds hydrogenation. The characterization results show that the nitrogen-functionalized active carbon prepared at 800℃ (N-AC- 800) shows higher nitrogen content and pyridinic nitrogen species. And its supported nickel catalyst (Ni/N-AC-800) shows the most finely and extremely dispersion of nickel nanoparticles, the highest content of Ni~0, and the largest metallic surface areas and the best H2 uptake quantity. Moreover, Ni/NAC- 800 also shows the best catalytic performance in nitro compounds hydrogenation reaction. The yield of 1,5-diaminonaphthalene reaches to 94.75%, and the catalyst could be recycled for four times and maintained stable catalytic performance. Ni/N-AC-800 also shows good catalytic performance in 1- nitronaphthalene and 1,8-dinitronaphthalene hydrogenation.