This work is devoted to the study of the role of both metals in the intermetallic Pt_xCu_y/ $\text{γ}$ Al₂O₃ catalysts commonly employed in CO-PROX reaction. Therefore, monometallic Pt and Cu based catalysts and PtCu intermetallic compound with different molar ratios (Pt₃Cu₁ and Pt₁Cu₃) supported catalysts were carefully synthesized and deeply characterized. Room temperature CO adsorptions by FTIR spectroscopy were carried out on the mono- and intermetallic catalysts being the monometallic catalyst determinant for the study. From the analysis of the nature of the platinum surface in Pt/ $\text{γ}$ Al₂O₃, we have demonstrated that the role of Pt sites is based in the CO dissociation for the CO₂ formation and also how the platinum surface is partially blocked by leftovers from the synthesis. Moreover, the study of the Cu/ $\text{γ}$ Al₂O₃ and the bimetallic catalysts Pt_xCu_y/ $\text{γ}$ Al₂O₃ allowed elucidating the effect of the copper in the metallic site and support interphase as well as the role of copper in the hydrocarbon oxidation.

这项工作致力于研究两种金属在金属间化合物Pt _x Cu _y /中的作用。$\text{γ}$通常在CO-PROX反应中使用的Al ₂ O ₃催化剂。因此，精心合成了具有摩尔比（Pt ₃ Cu ₁和Pt ₁ Cu ₃）的PtCu单金属催化剂和PtCu金属间化合物。FTIR光谱法在室温下对单金属和金属间催化剂进行了吸附，该金属和金属间催化剂是本研究的单金属催化剂决定因素。根据铂表面铂/金的性质分析$\text{γ}$Al ₂ O ₃，我们已经证明Pt位点的作用是基于CO的离解而形成的CO ₂，以及铂表面如何被合成的残留物部分地阻断。此外，对Cu /的研究$\text{γ}$Al ₂ O ₃和双金属催化剂Pt _x Cu _y /$\text{γ}$Al ₂ O ₃可以阐明铜在金属位点中的作用并支持相间作用，以及铜在烃氧化中的作用。