The hydrogen safety issue is spotlighted as the hydrogen process is extended. For this reason, we studied catalysts for H₂ oxidation at room temperature to ensure hydrogen safety. Catalysts were prepared by different preparation methods and compared to evaluate the role of Pt and Pd in Pt–Pd/TiO₂ catalysts. The catalytic activity was significantly enhanced when activity metal size was small and it was exposed to catalyst surface to a high Pd ratio. For the 0.1%Pt-0.9%Pd/TiO₂ catalyst, high hydrogen conversion of 90% was obtained under the condition of 0.5% hydrogen injection. To understand the correlation between activity and characteristics of catalyst, the physicochemical characteristics of the various catalysts were investigated by X-ray photoelectron spectroscopy (XPS), temperature-programmed oxidation and reduction (TPOR) and Field Emission-Transmission Electron Microscope (FE-TEM) analysis. From these analysis, it was found that Pt served the role of highly dispersion of active metal (Pt–Pd) and as with increasing Pd ratio of active metal, hydrogen activity was increased, which indicates that hydrogen oxidation had proceeded on the Pd site. Finally, the valence state of the Pd influenced hydrogen oxidation activity of Pt–Pd/TiO₂, which increased with increasing ratio of Pd⁰/Pd_Total.

随着氢工艺的扩展，氢安全问题成为人们关注的焦点。因此，我们研究了在室温下用于H ₂氧化的催化剂，以确保氢的安全性。通过不同的制备方法制备了催化剂，并进行了比较，以评估Pt和Pd在Pt-Pd / TiO ₂催化剂中的作用。当活性金属尺寸较小并且以高Pd比例暴露于催化剂表面时，催化活性显着增强。对于0.1％Pt-0.9％Pd / TiO ₂在0.5％氢气注入的条件下，获得了90％的高氢气转化率。为了了解催化剂活性与特性之间的关系，通过X射线光电子能谱（XPS），程序升温氧化还原（TPOR）和场发射-透射电子显微镜（FE-TEM）研究了各种催化剂的理化特性。 ）分析。从这些分析中发现，Pt起到了活性金属高度分散的作用（Pt–Pd），并且随着活性金属Pd比例的增加，氢活度也增加了，这表明氢氧化已在Pd部位进行了。最后，Pd的价态影响了Pt–Pd / TiO _2的氢氧化活性，并随着Pd比例的增加而增加。⁰ / Pd_总计。