Understanding the role of Ni-Sn interaction to design highly effective CO2 conversion catalysts for dry reforming of methane

Activity of La0.75Sr0.25Cr0.5Mn0.5O3−δ, Ni3Sn2and Gd-doped CeO2towards the reverse water-gas shift reaction and carburisation for a high-temperature H2O/CO2co-electrolysis

“…The mechanism of the heterogeneous RWGS reaction still remains unclear; meanwhile, two main interpretations prevail. Pekridis et al 21 suggested that at Pt, CO production occurs via formation of formate adsorbate on the catalyst surface according to reactions (9)(10)(11)(12)(13)(14)(15). This mechanism was also supported by FT-IR spectra published by Sun et al, 22…”

“…14 Interestingly, this material exhibited excellent stability against carbon formation over more than 650 h at 850 C; this was explained by the occupation of carbon nucleation sites by Sn atoms in the vicinity of Ni atoms. 15 Therefore, the intermetallic Ni 3 Sn 2 phase was considered as a possible cathode material for co-electrolysis.…”

Recent Progresses in the Design and Fabrication of Highly Efficient Ni-Based Catalysts With Advanced Catalytic Activity and Enhanced Anti-coke Performance Toward CO2 Reforming of Methane

“…In addition to this, Sn can also improve the dispersion of the metallic Ni and promote the oxidation of key reaction intermediates on the surface of the catalyst. Thereby, the formation of the final product will be facilitated (Bobadilla et al, 2016;Guharoy et al, 2018). Stroud et al (2018) found that the addition of Sn could greatly promote the catalytic activities and stabilities over the investigated Ni-Sn/Al 2 O 3 and Ni-Sn/CeO 2 -Al 2 O 3 catalysts toward CRM reaction.…”

“…This is because Sn atom has an electronic structure similar to C atom. This will facilitate the interaction between the p orbital of Sn and the 3d electron of Ni and thereby slow down the formation of coke (Guharoy et al, 2018). In addition to this, Sn can also improve the dispersion of the metallic Ni and promote the oxidation of key reaction intermediates on the surface of the catalyst.…”

Advantages of Yolk Shell Catalysts for the DRM: A Comparison of Ni/ZnO@SiO2 vs. Ni/CeO2 and Ni/Al2O3

“…This could be through many methods; obstruction of the metal active sites, the collapse of the catalyst support and the encapsulation of metal nanoparticles [14]. These reactions typically occur up to 700 • C, which is why typical reforming reactions are completed at higher temperature [10,15], although in DRM the decomposition of methane (Equation 7) is the largest cause of coke deposition at temperatures above 700 • C [16]. Plausible catalysts should be impervious to carbon accumulation as a form of deactivation.…”