Study on the metal-support interaction in the Ru/C catalysts under reductive conditions

Ammonia Synthesis Activity of Alumina-Supported Ruthenium Catalyst Enhanced by Alumina Phase Transformation

“…However, the presence of Ru species would catalyze carbon methanation, , which was usually considered to be the key reason for the deactivation of Ru/C catalysts. Iost et al proposed that the oxygen-containing carbon species were much more easily gasified to form methane than other carbon species . Lin et al reported that besides carbon methanation, carbon oxidation to form CO was also observed during heat treatment carbon-supported Ru catalysts, consequently affecting the activity and stability of Ru/C catalysts .…”

“…Iost et al proposed that the oxygen-containing carbon species were much more easily gasified to form methane than other carbon species. 15 Lin et al reported that besides carbon methanation, carbon oxidation to form CO was also observed during heat treatment carbon-supported Ru catalysts, consequently affecting the activity and stability of Ru/C catalysts. 16 Compared to alkali compounds, Ba is catalytically less active for carbon gasification (CH 4 and CO), 17,18 thus a Ru/C catalyst of high stability can be prepared by using Ba as promoter.…”

“…16 Compared to alkali compounds, Ba is catalytically less active for carbon gasification (CH 4 and CO), 17,18 thus a Ru/C catalyst of high stability can be prepared by using Ba as promoter. However, the presence of oxygen surface groups not only facilitated the dispersion of Ru species, 15 but also changes the properties of adsorbed hydrogen species. 19 In such a case, the removal of oxygen surface groups could lead to conflict between catalytic activity and catalyst stability, and the excellence of carbon-supported Ru catalysts for ammonia synthesis cannot be fully realized.…”

Reaction of H2 with polyoxometalate supported Rhodium(0) and Iridium(0) nanoparticles in aqueous suspensions: a kinetic study

“…The metalhydrogen interactions are crucial, especially in the advancement of fuel cells and hydrogen technologies. 5 Numerous studies have been conducted on the interaction of H 2 on transition metal surfaces, especially on the interaction of hydrogen with palladium, [6][7][8][9][10] platinum, [11][12][13] iron, 14,15 ruthenium, [16][17][18][19] tungsten [20][21][22] and nickel [23][24][25] as well as other transition metals. 26 The mechanisms of these processes involve the adsorption of hydrogen on the metal catalyst followed by dissociation and often by migration of H atoms to the support and reactions at remote surface sites.…”

Investigation of Local Structure and Enhanced Thermal Stability of Ir-Doped PdRu Nanoparticles for Three-Way Catalytic Applications

“…Ruthenium (Ru) nanoparticles (NPs) are known to display excellent catalytic properties for the oxidation of CO/hydrocarbons and NO x reduction. − Recently, numerous investigations have been devoted to enhancing the catalytic performance of Ru NPs . It has been demonstrated that the catalytic properties of bimetallic alloys such as PdRu show drastic improvement in CO oxidation capability relative to individual Pd/Ru NPs. − Although Pd and Ru are an immiscible system in bulk form, solid-solution alloy NPs form because of the distinct thermodynamics activity in the NP state .…”