Ni-Pt nanoparticles supported on MIL-101 as highly efficient catalysts for hydrogen generation from aqueous alkaline solution of hydrazine for chemical hydrogen storage

摘要

Highly dispersed bimetallic Ni-Pt nanoparticles with different compositions supported on MIL-101 have been successfully synthesized by a simple liquid impregnation method. The as-synthesized NPs in an average of 1.9 ± 0.4 nm could be isolated by certification and characterized by using PXRD, TEM, EDX, XPS, BET, and ICP-AES. Catalytic activity of the Ni -Pt@MIL-101 was tested in the hydrogen generation from aqueous alkaline solution of hydrazine. These catalysts were composition dependent for the catalytic activity. Among all the Ni-Pt@MIL-101 catalysts tested, the Ni_(88)Pt_(12)@MIL-101 exhibited the highest catalytic activity, with the turnover frequency (TOF) value of 350 mol_(H_2) mol_(metal)~(-1)h~(-1) at 50 ℃, which is the highest among all the previously reported catalysts.