Design and Preparation of Impregnated Catalysts

Evolution of the electrochemical interface in high-temperature fuel cells and electrolysers

“…Impregnation, or infiltration, is a technique that has been used extensively in the field of heterogeneous catalysis to immobilise high surface area catalytic particles onto ceramic support materials, such as alumina, silica and zirconia 68,69 . To this end, precursor solutions of the catalytically active materials are used to wet the surface of the support (see Figure 6).…”

Understanding the Influence of the Pretreatment Procedure on Platinum Particle Size and Particle-Size Distribution for SiO2 Impregnated with [Pt2+(NH3)4](NO3−)2: A Combination of HRTEM, Mass Spectrometry, and Quick EXAFS

“…A disadvantage of H 2 PtCl 6 is that the presence of chlorine alters the acidity of the support material (17) and can poison the catalyst. Platinum acetylacetonate [Pt(acac) 2 ] is reported to result in highly dispersed particles (12). A disadvantage of this precursor is the use of organic solvents, which can result in carbonaceous residues on the catalyst and organic waste.…”

“…Commonly used precursors for Pt are H 2 PtCl 6 (8)(9)(10)(11)(12)(13), Pt(NH 3 ) 4 (NO 3 ) 2 (14), and Pt(acac) 2 (12,15,16). Each precursor has its own unique properties.…”

“…A straightforward method for loading a metal precursor of a supported heterogeneous transition-metal catalyst is incipient wetness impregnation (1,2). Typically, a metal precursor is dissolved in an aqueous solution and brought into the pores of the support.…”

Envisaging the Physicochemical Processes during the Preparation of Supported Catalysts: Raman Microscopy on the Impregnation of Mo onto Al2O3 Extrudates

“…Over the years, models have been developed to describe the physicochemical processes that take † Utrecht University. place during the preparation of supported catalyst bodies, [20][21][22][23][24][25][26][27] but in all cases characterization was carried out after drying and/or calcination. Spectroscopic studies that focus on the interaction between metal precursors and the support have generally been carried out on powder supports.…”