Xue Song,Pan Yang,Jingchuan Wang,Xiaochong Zhao,Yuanlin Zhou,Yintao Li,Lijun Yang
The exploration of highly efficient catalysts for the hydrolysis of hydrous hydrazine is of great significance for the achievement of future hydrogen economy. In this regard, herein, a catalyst with NiFePd loaded on the metal–organic framework (MOF) UiO-66 was successfully prepared by a simple and safe chemical impregnation method. Due to its high specific surface area, the as-prepared NiFePd/UiO-66 catalyst exhibited efficient catalytic performance for the generation of hydrogen from hydrous hydrazine in an alkaline solution. The results showed that the Ni0.25Fe0.25Pd0.5/UiO-66 catalyst exhibited optimal properties for the decomposition of hydrous hydrazine in an alkaline aqueous solution with a nearly 100% hydrogen selectivity, good activity, and the high total turnover frequency (TOF) value of up to 662.4 h−1 at 80 °C. Moreover, the Ni0.25Fe0.25Pd0.5/UiO-66 catalyst exhibited good durability, which slightly decreased after five cycles of catalytic reaction at 60 °C.
Kun Yang,Kangkang Yang,Shiliang Zhang,Yan Luo,Qilu Yao,Zhang-Hui Lu
Trimetallic NiFePd nanoparticles (NPs) anchored on metal-organic framework (MOF) MIL-101 have been facilely prepared via a simple impregnation method. The as-prepared NiFePd/MIL-101 catalysts have been characterized by powder X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM) equipped with energy dispersed X-ray detector (EDX) and selected area electron diffraction (SAED), inductively coupled plasma-atomic emission spectroscopy (ICP-AES), N 2 adsorption/desorption isotherms and X-ray photoelectron spectroscopy (XPS) techniques. And the as-synthesized catalysts have been applied for hydrogen generation from aqueous alkaline solution of hydrazine borane (HB, N 2 H 4 BH 3 ). Compared to the pure Ni 0.36 Fe 0.24 Pd 0.4 NPs, MIL-101 supported mono- and bi-metallic counterparts, the Ni 0.36 Fe 0.24 Pd 0.4 /MIL-101 catalyst exhibits much higher catalytic performance for complete conversion of N 2 H 4 BH 3 to H 2 with 100% selectivity at 323 K. The turnover frequency ( TOF ) value for the dehydrogenation of N 2 H 4 BH 3 in the presence of Ni 0.36 Fe 0.24 Pd 0.4 /MIL-101 catalyst reaches 60 h −1 . Remarkably, the Ni 0.36 Fe 0.24 Pd 0.4 /MIL-101 catalyst also shows high catalytic activity and 100% selectivity towards hydrogen generation from hydrous hydrazine (N 2 H 4 ·H 2 O) at 323 K with a TOF value of 40.8 h −1 . In addition, the durability tests exhibit that the Ni 0.36 Fe 0.24 Pd 0.4 /MIL-101 catalyst is still highly active in the complete dehydrogenation of N 2 H 4 BH 3 and decomposition of N 2 H 4 ·H 2 O with 100% hydrogen selectivity even after five recycles.
危险品化学品经营许可证（带存储）