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近来,现代表面技术X-射线光电子能谱(XPS)与其他物理化学技术结合,表征高分散双金属催化剂,如Pt—Sn/Al_2O_3受到极大的注意。随着研究的深入,越来越多的数据表明,催化剂中的Sn仍是以氧化态存在,并非与Pt产生合金化作用。但是,无论是持Sn与Pt产生合金化作用观点的研究者,或是持有Sn并非以Sn(0)存在的科学研究人员,报道的试验结果还存在着不小的分岐。有时,即使所用的研究手段极其相似也存在着这种现象。我们认
Recently, modern surface technology X-ray photoelectron spectroscopy (XPS) in combination with other physicochemical techniques has drawn great attention for the characterization of highly dispersed bimetallic catalysts such as Pt-Sn / Al 2 O 3. With the deepening of the research, more and more data show that the Sn in the catalyst is still in the oxidation state, not with the alloying of Pt. However, no matter whether researchers who hold the viewpoint of alloying Sn and Pt or those who hold Sn and do not know Sn (0) exist, there are still many differences in the experimental results. Sometimes, this phenomenon exists even when the research methods used are extremely similar. We recognize