A system investigation on Ru-MOF-74 with efficient photocatalytic nitrogen fixation performance

Dielectric barrier discharge plasma-assisted catalytic ammonia synthesis: synergistic effect of Ni-MOF-74 catalyst and nanosecond pulsed plasma

“…A magnified view (40°-80°) of figure 2(a) is presented in figure 2(b). Analysis based on Ni-PDF#04-0850 revealed prominent peaks of metal nickel at 44.5°, 51.8°, and 76.3° in the spent catalyst, indicating that plasma discharge induced defects in the crystal structure of Ni-MOF-74, then resulting in the release of some metal nodes and the formation of free metal particles [32]. Figure 2(c) shows the infrared spectrum of the Ni-MOF-74 catalyst.…”

“…Ligand-unsaturated metal vacancies are then exposed, which are usually the active sites for catalytic reactions. Calleja et al [32] utilized Cu-MOF-74 to improve the catalytic efficiency of the Friedel-Crafts acylation reaction of p-anisole. Yan et al [33] designed and synthesized Ru-MOF-74, which demonstrated significantly enhanced photocatalytic nitrogen fixation activity under visible light irradiation.…”

Mechanism Comprehension and Design of MOF Catalysts for Photocatalytic Ammonia Production

“…Consequently, a nitrogen fixation activity of approximately 315 μmol·h –1 ·g –1 was achieved by this strategy, which is three times higher than that of unmodified samples. Yan et al adopted a similar strategy, as depicted in Figure B, in which a series of MOF-74 modified with Ru was designed for NRR . The incorporation of Ru into MOF-74 not only reduced crystallinity but also stimulated the development of crystal planes between 35° and 38° (Figure B).…”

“…(B) Doping Ru in MOF-74 for enhancing NRR: (i) NRR mechanism for Ru-MOF-74, (ii) XRD patterns of the series of Ru-MOF-74, and (iii) energy band gaps for the series Ru-MOF-74. Reprinted with permission from ref . Copyright 2022 Elsevier.…”

Au Nanoparticle-Loaded UiO-66 Metal–Organic Framework for Efficient Photocatalytic N2 Fixation

“…In recent years, many nanoparticle-scale (NP) catalysts have been successfully prepared using MOFs as carriers, exhibiting high photocatalytic properties [36][37][38][39]. For the photocatalytic nitrogen fixation reaction (NRR), MOF-based NPs have the following advantages: (i) MOF carriers have high N 2 adsorption ability to enrich the N 2 concentration around the active NP sites; and (ii) the metal-carrier interactions between the NPs and the MOFs significantly accelerate the charge transfer, which enhances the catalytic properties by providing a suitable electronic environment [32,36,40,41]. Among them, gold (Au) is considered an excellent catalyst for ammonia synthesis [42][43][44].…”