Zeolitic imidazolate frameworks (ZIFs) have attracted extensive research interests because of their porosity, large specific area, and adjustable aperture. In particular, a series of nanomaterials derived from ZIF-67 precursor has broad application prospects in energy and environment. In this paper, Co-ZIF nanocrystal was synthesized by solvothermal method, by introducing a second kind of transition metal Ni, the NixCo1-x-ZIF nanocrystals with single metal Co-ZIF structure were synthesized. NixCo1-x-O composites were obtained by oxidation of NixCo1-x-ZIF nanocrystals, and the electrocatalytic hydrogen evolution activity of composites modified glassy carbon electrode in 1 M KOH solution was tested. It is found that the Ni0.5Co0.5-O composites have the lowest overpotential compared with similar composites.
Hydroisomerization dewaxing is an advantageous process to improve lubricating oil quality. The bifunctional catalyst used in the hydrogenation isomerization reaction provides the isomerization function with the acidic site supported by molecular sieve, and the precious metals such as Pt and Pd provide the hydrogenation function for the metal site, which has the advantages of high activity, low production cost, and mature synthesis process. The ZSM-22 zeolite was hydrothermal synthesized using 1,6-diamino hexane (DAH) as templates in the presence of the seed, XRD, N2 adsorption-desorption and NH3-TPD Cha adsorption-desorption times. Finally, the hydroisomerization dewaxing performance of the Pt/ZSM-22 and Pt-Pd/ZSM-22 bifunctional catalysts were investigated on a high-pressure fixed-bed hydrogenation reactor. The results show that the hydroisomerization dewaxing performance of the Pt-Pd/ZSM-22 catalyst is better.
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