Effects of particle size on surface electronic and electrocatalytic properties of Pt/TiO₂nanocatalysts

Abstract

Size-controlled Pt nanocatalysts embedded in TiO(2) were successfully synthesized by simultaneous dual-gun sputtering and were found to exhibit unique electronic properties depending on their size, which affected the potential of zero total charge, CO-bulk oxidation, and methanol oxidation reaction.

Nanoparticulate TiO2-promoted PtRu/C catalyst for methanol oxidation

“…The proposed reason for this improvement is that on TiO 2 -PtRu/ C, OH species can easily form on the surface of TiO 2 during the MOR process, which facilitates the conversion of the poisonous CO into CO 2 [22].…”

“…Similar to Pt catalyst, the OH species, which are present on the surface of TiO 2 in aqueous solutions, cause a greater shift in the surface oxidation of Pt (Pt-OH formation). Therefore, the presence of TiO 2 facilitates the removal of CO-like intermediates from the surface of PtRu catalyst and reduces the poisoning of the PtRu catalysts during MOR [22].…”

Preparation and characterization of Pt/TiO 2 nanofibers catalysts for methanol electro-oxidation

“…TiO 2 [21,22], MoO x [23], SnO 2 [24], CeO 2 [25,26], and WO 3 [27,28] have been employed as supports to enhance the activity and stability of the electro-catalysts for methanol oxidation. The transition metal oxides have high chemical stability, good corrosion resistance and strong metalsupport interaction, which can enhance the activity of the catalysts.…”

CeO2 nanorods with high energy surfaces as electrocatalytical supports for methanol electrooxidation

“…Recently, a series of Pt/metal-oxide/C catalysts with excellent electrocatalytic activity such as Pt/CeO 2 /C [7][8][9][10], Pt/TiO 2 /C [11][12][13], Pt/RuO 2 /C [14] and Pt/SnO 2 /C [15,16] have been synthesized for methanol electrooxidation. Among various metal oxide co-catalysts/support, CeO 2 has received widespread attention for its abundant O-vacancy defects, lower price, better redox (Ce 4+ /Ce 3 + ) property and anti-corrosion ability in acid media [7].…”