RESEARCH / A0587
Unveiling Atomic-Scale Product Selectivity at the Cocatalyst-TiO2 Interface Using X-Ray Techniques: Insights into Interface Reactivity
Read the original paper · 10.1002/smtd.202301120 ↗
Source figures may contain other techniques and soft X-ray spectra. C, N and O measurements are outside our current hard-XAFS testing range.
Figure 2. Elucidation of the alterations in the chemical environment at the interface between the cocatalyst and TiO2 single crystal facets through the utilization of X-ray detection techniques. a) Illustration demonstrating the influence of atom position on the intensity of XRD diffraction peaks. b) Schematic representation showcasing the transformation of Ti6c─O bonds into Ti6c─O─Pt bonds within the inner atomic layer of the corresponding crystal facet. Oxygen is depicted as red balls, titanium as blue balls, and platinum as silvery balls. c) Enlarged image of the highlighted area in (b), exhibiting the elongation of the Ti6c─O chemical bond length due to the presence of the PtO phase. d) Relative peak ratio of (200)/(101) for the M/TiO2 series. e) Relative peak ratio of (004)/(101) for the M/TiO2 series. f) EPR spectroscopy analysis for Pt/TiO2-010. g) Ti L2,3-edge NEXAFS spectra of the M/TiO2-010 series. h) Second derivatives of the NEXAFS spectra.