Αποτελέσματα Αναζήτησης
27 Δεκ 2021 · Here, we have developed model Pt/TiO 2 catalysts based on the deposition of colloidal Pt nanoparticles and studied their atomic and electronic structures before and after a postdeposition treatment that induces catalytic activity using aberration-corrected scanning transmission electron microscopy, electron energy loss spectroscopy, and first ...
SP-ICP-MS measurements were correlated with the information gained using other characterization techniques, i.e. transmission electron microscopy (TEM) and small angle X-ray scattering (SAXS). The particle surface as an important descriptor of NMs was analyzed by X-ray diffraction (XRD).
1 Ιουν 2023 · The results of the XPS Pt 4 f measurements listed in Table S2 reveal that the different ratios between the Pt(II) and Pt(0) oxidation states occur for the investigated TiO 2 +Pt catalysts. Depending on the TiO 2 support used, different amounts of metallic Pt and Pt oxides are thus formed on the catalyst surface exhibiting different reduction ...
23 Ιουλ 2019 · X-ray diffraction (XRD) patterns for samples of nanoparticles having different sizes and shapes can look different, and careful analysis of the XRD data can provide useful information and also help correlate microscopic observations with the bulk sample.
The experimental XRD pattern agrees with the JCPDS card no. 21-1272 (anatase TiO2) and the XRD pattern of TiO2 nanoparticles other literature [8]. The 2θ at peak 25.4° confirms the TiO2 anatase structure [9]. Strong diffraction peaks at 25° and 48° indicating TiO2 in the anatase phase [10].
5 Μαΐ 2021 · Pt/TiO 2 catalysts were fabricated by dispersing uniform Pt colloids of 3.0 nm on TiO 2 nanosheets that preferentially exposed the {001} facets; the chemical nature of the metal–support interaction was examined by hydrogen treatment at 473–773 K.
1 Ιουλ 2022 · Abstract. For more than 20 years, Pt/TiO 2 represents the benchmark photocatalyst/co-catalyst platform for photocatalytic hydrogen (H 2) generation. Here, single atom (SA) Pt is decorated on different polymorphs of TiO 2 (anatase, rutile, and the mixed phase of P25) using a simple immersion anchoring approach.
