Presented in Figure S3 and be calculated NiO and 725 nm. Table
Presented in Figure S3 and be calculated NiO and 725 nm. Table 1. As noticed S3, NiO characteristic bands can thefound at 290, 430band gaps inIn addition, a shift in Figure S3, NiO 1st band toward higher wavelengths at 290, 430 and 725 Ni-Li/USY on thecharacteristic bands can be located (redshift) could be observed fornm. Moreover, a shift on specially, for Ni-K/USY. greater wavelengths (redshift) with all the presence for and,the initial band toward This displacement could be associatedcan be observed of Ni-Li/USY aggregated NiO particles in these samples displacement might be related together with the presence and, specially, for Ni-K/USY. This [413], which is in agreement with the crystallite sizes presented in particles in these to this, NiO[413], whichdetermined, as of aggregated NiO Table 1. Furthermore samples band gaps had been is in agreement with all the they’re able to be indicators of your electronic properties from the catalysts as well because the degree of crystallite sizes presented in Table 1. Along with this, NiO band gaps had been determined, metals agglomeration. Li- and K-containing catalysts presented decrease values, which could as they’re able to be indicators with the electronic properties of the catalysts also because the degree of be as a result of the presence of larger NiO particles on these samples. metals agglomeration. Li- and K-containing catalystsH2-TPR profiles (Figure three), which may In terms of reducibility, characterized by the collection of presented reduced values, be because of the incorporated alkali metal particles on these samples. the nature of thepresence of bigger NiOsignificantly influenced NiO redox properties. Within the profile of Ni/USY, the reduction of NiO situated around the external surface 2 -TPR profiles (Figure three), When it comes to reducibility, characterized by the collection of H of your zeolite (350nature with the USY mesoporous cavities (500significantly influencedRegarding the) and inside incorporated alkali metal) might be observed [22]. NiO redox properties. the the profile of Ni/USY, the reduction of NiOfollowed the order: Ni-K/USY Ni- with the zeolite In bimetallic samples, the reducibility below 470 located around the external surface Cs/USY Ni-Li/USY. As seen, K incorporation strongly weakened the interaction among (350 C) and inside USY mesoporous cavities (500 C) may be observed [22]. Regarding NiO plus the support, with a lot of the nickel oxides species reduction occurring beneath the bimetallic samples, the reducibility below 470 C followed the order: Ni-K/USY 500 , with this behavior confirmed in the literature [13].Processes 2021, 9,Ni-Cs/USY Ni-Li/USY. As observed, K incorporation strongly weakened the interaction between NiO and the assistance, with most of the nickel oxides species reduction occurring 7 of 19 under 500 C, with this behavior confirmed inside the literature [13].Figure three. H2-TPR profiles obtained for Ni-A/USY catalysts. Note that for Ni-K/USY, the experiment Figure three. H2 -TPR profiles obtained for Ni-A/USY catalysts. Note that for Ni-K/USY, the experiment was carried till 650 to prevent the eventual reaction of K compounds using the quartz reactor. was carried till 650 C to stop the eventual reaction of K compounds with all the quartz reactor.3.1.two. Decreased Catalysts Characterization Lowered catalysts have been characterized by XRD, plus the Pinacidil In stock benefits are exhibited in Figure 1. In agreement using the final results for calcined catalysts, no peaks SC-19220 Cancer ascribed towards the USY zeolite support have been located in the bimetallic samples, when the presence of Ni0 phases.
