Ru–Ni/GA-MMO composites as highly active catalysts for CO selective methanation in H2-rich gases

RuNi/MMO Catalysts Derived from a NiAl-NO3-LDH Precursor for CO Selective Methanation in H2-Rich Gases

“…Figure 1 shows the X-ray diffraction (XRD) patterns of the prepared LDH and MMO samples with different concentrations of HNO 3 ethanol solutions (0.03 M, 0.06 M, 0.09 M, and 0.12 M) in the acid-alcohol ion-exchange reaction. As shown in Figure 1a, the diffraction peaks of the LDHs-C samples at 11.4 • , 23.2 • , 35.2 • , and 62.1 • correspond to the (003), ( 006), (012), and (110) crystal planes of the LDHs (JCPDS , respectively [28]. The typical LDH crystal plane diffraction peaks of the LDHs-N samples were almost identical to those of the LDHs-C samples, indicating that the LDHs-N samples were formed and that the acid-alcohol ion-exchange reaction did not destroy their layered structure.…”

“…The low-temperature (50-300 • C) peak is ascribed to CO adsorbed weakly onto the catalyst surfaces [50]. The high-temperature (300-600 • C) peak is assigned to the bridgebonded adsorptive CO [28]; it is generally believed that bridged chemical adsorption contributes more to the formation of CH 4 than single-site chemisorption [51]. In contrast to the RuNi/MMO-C catalyst, the peak position of bridge-adsorbed CO shifted from 436 • C to 449 • C for RuNi/MMO-N, indicating a stronger interaction between the active sites of RuNi/MMO-N and CO [6].…”

Enhanced sensitivity towards hydrogen by a TiN interlayer in Pd-decorated SnO2 nanowires

“…Nowadays, due to high pollution and harms caused by the use of fossil resources, the development of sustainable and green energy is the general trend. 1 Hydrogen (H 2 ) is the most abundant element in the universe, 2 and its consumption does not generate toxic emissions. 3 It is, indeed, regarded as the most promising new fuel for vehicles.…”