Room temperature O2 plasma treatment of SiO2 supported Au catalysts for selective hydrogenation of acetylene in the presence of large excess of ethylene

Understanding the synergistic effects of gold bimetallic catalysts

“…Recently, Mou's group developed a mild method for removing surfactant by employment of nonthermal O 2 plasma [33,65], which could effectively alleviate the particle sintering induced by high temperatures. Since most surfactants can be extracted by suitable solvents under mild conditions, efforts in this direction may also be rewarded [66].…”

Catalysis by gold: New insights into the support effect

“…could greatly improve the overall catalytic activity of the Au Reprinted from Refs. [84,122] with permission by Elsevier.…”

“…3) [80,122]. The size of GNPs could remain at ∼3 nm after plasma treatment and the NH 2 at the top of gold NP was removed efficiently while the NH 2 at the Au-silica interface still provides the metal-support interaction [122] Thus, the mild oxygen plasma treatment could be potentially useful in combination with encapsulated GNPs to enhance the metal-support interaction. This method would also be a promising Figure 6 Stable GNP in hollow silica nanospheres for corking and uncorking of CO oxidation.…”

In-situ regeneration of Au nanocatalysts by atmospheric-pressure air plasma: Significant contribution of water vapor

“…electrons, ions and radicals) with Au catalyst could effectively remove the accumulated carbonate species from catalyst surface at low temperature. Although various plasma techniques have been employed to prepare or modify Au catalysts [22,23], few works on plasma regeneration of Au catalysts were reported [17,24]. Our previous work demonstrated that pure oxygen plasma is a fast and effective approach to in-situ regenerate Au/TiO 2 nanocatalyst [24].…”