In‐situ Raman spectroscopy study of Ru/TiO₂ catalyst in the selective methanation of CO

Abstract

Raman spectroscopic technique has been used to characterize a Ru/TiO 2 catalyst and to follow in-situ their structural changes during the CO selective methanation reaction (S-MET). In order to a better comprehension of the catalytic mechanism, the in situ Raman study of the catalysts activation (reduction) process, the isolated CO and

Raman spectroscopy of zinc oxide nanoplatelets modified with ruthenium (II) complexes

“…In addition to the DSSC and biomedicine, other fields of application emerge as well. Ruthenium dyes have been successfully used to generate electrostatically stabilized gold colloides, whereas Ru/TiO 2 has been employed as a catalyst in the selective methanation of CO . A number of recent studies are devoted to the materials that incorporate ruthenium, for example, the ruthenium doped ZnO nanorods, amorphous silicon ruthenium thin films embedded with nanocrystals, Ru‐doped ZnS quantum dots, ruthenium complexes bound to CdSe nanoparticles, hybrid materials including the Zn (II)‐Ru (II) complexes, trinuclear ruthenium complex, Ru‐red, and isolated and agglomerated gold nanoparticles functionalized with a ruthenium dye …”

Policies and Motivations for the CO2 Valorization through the Sabatier Reaction Using Structured Catalysts. A Review of the Most Recent Advances

“…There are recent reviews on the catalytic hydrogenation of carbon dioxide [48,55]. Supported Ru-, Rh-, or Co-based catalysts on different support oxides (TiO 2 , SiO 2 , Al 2 O 3 , CeO 2 , ZrO 2 ) have been extensively studied for the hydrogenation of CO 2 [56,57]. However, Ni-based catalysts remain the most widely studied materials mainly due to their low cost [58] despite the highest turnover numbers of Ru-based catalysts [59].…”

“…The addition of alkaline or alkaline-earth cations promote dissociation and helps gasifying carbon deposits. The high oxygen storage capacity of reducible oxides, such as CeO 2 , the easiness of the reducibility of the active phase, the metal dispersion or the support basicity are key factors in the catalyst activity [56].…”

Recent advances in linear and non‐linear Raman spectroscopy. Part XI

“…Martinez Tejada used in situ Raman spectroscopy to study Ru/TiO 2 , a catalyst in the selective methanation of CO. Raman spectra show that the catalyst is composed by islands of TiO 2 ‐RuO 2 solid solutions, constituting Ru‐TiO 2 interphases in the form of Ru x Ti 1‐x O 2 rutile type solid solutions . Taddei, Pavoni, and Tsukada described the stability toward alkaline hydrolysis of B. mori silk fibroin grafted with methacrylamide.…”

“…[154] 15.6 | Solid surfaces, fibres, and thin films Martinez Tejada used in situ Raman spectroscopy to study Ru/TiO 2 , a catalyst in the selective methanation of CO. Raman spectra show that the catalyst is composed by islands of TiO 2 -RuO 2 solid solutions, constituting Ru-TiO 2 interphases in the form of Ru x Ti 1-x O 2 rutile type solid solutions. [155] Taddei, Pavoni, and Tsukada described the stability toward alkaline hydrolysis of B. mori silk fibroin grafted with methacrylamide. IR and Raman spectroscopy proved valid techniques to investigate the degradation mechanism and kinetics of grafted silk fibroin fibers and so for designing high-performance silk-based materials.…”