The effect of coating TiO2 on the CO oxidation of the Pt/γ-alumina catalysts was observed through activity tests and surface characterization spectroscopy by X-ray photoelectron spectroscopy (XPS ...

The Pt 4d 5/2 spectra indicates the peak bind- ing energy of different Pt species observed at the binding energy of Pt 0 (314.02-314.07 eV) and Pt 4+ (318.10 eV) was recognized by XPS database at ...

1988年6月1日 · Analysis of Pt supported on alumina by XPS is complicated by overlapping Al2p and Pt4f lines. The interference problem is eliminated when the Pt4d 5 2 lines are used instead. Although these lines are relatively broad, they can be used to discriminate between particulate and dispersed phase Pt on alumina.

The high-resolution Pt4d spectrum showed two strong peaks at 315.48 and 331.58 eV, which were from Pt4d5/2 and Pt4d3/2, respectively (Fig. 4b) [27]. The high-resolution Zn2p spectrum presented two ...

Download scientific diagram | XPS spectra of the Pt 4d or Pt 4f levels with the corresponding BE values observed over the prepared catalysts. from publication: Glycerol to Glyceraldehyde Oxidation ...

2019年5月5日 · Based on the experimental observations of XPS measurements (Fig. 4), the active oxygen species over Pt@TMO/3DOM-Al 2 O 3 catalysts are mainly derived from the core-shell interfaces, and the core-shell boundaries serve as a reservoir for oxygen species in soot oxidation. It is concluded that the catalytic performances of catalysts depend on the ...

2003年8月1日 · XPS results revealed an increased formation of a highly oxidized Pt species over sulfated 1%Pt/γ-Al 2 O 3 that suggests that the promoting effect on the propane combustion is due to the interaction of surface sulfates with surface highly oxidized Pt atoms that can be ascribed to Pt 4+ at the edge of the Pt particles.

在 XPS测试 谱图中，对于带2p、3d、4f标识的元素，比如S2p、Ba3d、Pb4f等元素；由于 自旋劈裂效应 ，当这些元素存在一种 化学态 时，就会劈裂成两个不同属性的峰，对应XPS谱图通常会存在两个峰（过渡族元素除外，因其存在各类型伴峰，谱图比较复杂）。

xps能谱仪，掌握材料性质，为生产和分析实验室提供出色结果，了解详情 ››

The XPS spectrum of Pt4f7/2 and Pt4f5/2 is fitted with the binding energies of 75.5 and 78.5 eV, respectively, as shown in Figure 5b, which has been found for Pt 4+ ionization, as reported ...