Suppression of phosphine-protected Au₉ cluster agglomeration on SrTiO₃ particles using a chromium hydroxide layer

Abstract

Gold clusters have been shown to have great potential for use as co-catalysts in photocatalytic water splitting. Agglomeration of Au clusters deposited onto semiconductor surfaces into larger particles is a...

Au9 nanocluster adsorption and agglomeration control through sulfur modification of mesoporous TiO2

“…The range of binding energies of 83.7-84.4 eV with an FWHM of 1.0 AE 0.2 eV is attributed to agglomerated and large Au 9 NCs named low binding peak (LBP). [53][54][55][56]51 is best suited to determine the size of Au clusters deposited onto porous materials compared to scanning techniques like AFM 57 and electron microscopy 56 unless flat substrates can be used for AFM or substates transparent for electron microscopy. XPS further has an advantage over microscopic techniques that is analysis large surface areas.…”

Enhanced Photocatalytic Degradation of Methyl Orange Using Nitrogen‐Functionalized MesoporousTiO2 Decorated with Au9 Nanoclusters

“…[23,71,76] Non-agglomerated (namely high binding peak, HBP) and agglomerated (namely low binding peak, LBP) Au 9 NCs exhibit binding energies between 84.6-85.2 and 83.7-84.4 eV, respectively. [24,48,77,78] Thus, cluster peaks are generally shifted to higher binding energies in comparison with larger NPs. Therefore, the Au peak in Figure 6e is assigned to non-agglomerated Au 9 clusters attached to the black MNTiO 2 .…”

Gold photocatalysis in sustainable hydrogen peroxide generation

“…Additionally, the aggregation of Au nanoparticles on supports might conceal the true nature of the catalytic active sites. Several approaches to prepare highly stable and resistant Au catalysts against sintering have been reported such as the use of porous supports, transformation of supports, epitaxial overgrowth, overlayer coating, and encapsulation of Au nanoparticles in the porous support cavity [74][75][76][77][78]. An alternative is to explore atomically-precise Au clusters with definite size and structure and/or single Au atom catalysts [79][80][81][82][83].…”