Reasons for the deactivation of Pt0/TiO2 photocatalyst treated by inert gas N2

Early-Stage Deactivation of Platinum-Loaded TiO2 Using In Situ Photodeposition during Photocatalytic Hydrogen Evolution

“…The resulting decrease in accessible active surface area is responsible for a partial or complete loss of catalytic activity (“decoration model”). An additional contribution may stem from interfacial charge transfer between the metal and the reduced metal oxide (“electronic model”), which has been observed after reduction at temperatures as low as 473 K. ,− This phenomenon has not been reported in ambient conditions so far, and very few reports have discussed SMSI in the broader context of photocatalysis (e.g., refs − ). Indeed, we have observed Pt nanoparticles that did contain a thin shell of presumably TiO 2 , thus suggesting metal encapsulation (see Figures S11–14 in the Supporting Information).…”

Stability study of ultra-low Pt thin film on TiO 2 –C core–shell structure and TiO 2 encapsulated in carbon nanospheres as cathode catalyst in PEMFC

“…This interaction has been shown to form in a numerous system containing fine metal particles well dispersed on the surface of inorganic oxide support. In separated works, Wang, Zhang, Berko et al studied simulation and experimental effect of SMSI in Pt-TiO 2 [36][37][38].…”

Enhanced photocatalytic activity of titania nanotube array films supported with highly dispersed Pt nanoparticles

“…In our previous study, the effect of different atmosphere (air, N 2 or H 2 ) and temperature on the photocatalytic activity on Pt/TiO 2 was investigated through in situ X-ray photoelectron spectroscopy (XPS) depth profiling with argon ion sputtering. [11][12][13] We found that two different effects, i.e., diffusion effect and encapsulation effect, could take place along with strong interaction under H 2 atmosphere. Such a strong interaction between Pt and TiO 2 under H 2 atmosphere may decrease the photocatalytic activity.…”