RT journal article
T1 Speciation-controlled incipient wetness impregnation: A rational synthetic approach to prepare sub-nanosized and highly active ceria–zirconia supported gold catalysts
A1 del Río, Eloy
A1 Gaona, Diana
A1 Pérez Omil, José Antonio
A1 Hernández Garrido, Juan Carlos
A1 Calvino Gámez, José Juan
A1 García Basallote, Manuel
A1 Fernández-Trujillo Rey, María Jesús
A1 Gatica Casas, José Manuel
A2 Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica
K1 Supported Au catalysts
K1 Synthesis
K1 Speciation
K1 Incipient wetness impregnation
K1 CO oxidation
K1 High dispersion
AB On the basis of calculated thermodynamic species distribution diagrams and by appropriately controlling the pH of aqueous HAuCl4 solutions, it has been possible to prepare, using a Speciation-controlled Incipient Wetness Impregnation (ScIWI) approach, Au catalysts supported on ceria–zirconia mixed oxides featuring both high gold loadings and excellent metal dispersions. This rational synthesis method is carried out at room temperature. It is both much simpler, in equipment terms, and less expensive than widely used Deposition–Precipitation (DP). Moreover, the use of ScIWI allows overcoming the severe limitations of previously assayed impregnation methods. With this procedure it is possible to prepare active catalysts in CO oxidation with high efficiency in terms of gold precursor usage, i.e. minimizing Au losses during synthesis. Therefore this, quite amenable, novel strategy for the facile preparation of highly dispersed supported gold catalysts gathers the necessary requirements for both its use at lab scale and an easy scaling-up to industrial levels.
PB Elsevier
YR 2014
FD 2014
LK http://hdl.handle.net/10498/20479
UL http://hdl.handle.net/10498/20479
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 15-nov-2026