Abstract In the current study, four new catalysts were synthetized by using TUD-1 mesoporous material as a support for bi-metallic Noble metals nanoparticles. M-Au-TUD-1 (M = Rh, Pd, Pt, and Ag) were prepared with a total metals loading of 2 wt% by applying the ratio of 1Au:1M. Several physical and chemical characterizations were performed to understand the structure of the prepared catalysts. The characterization results showed the formation of bi-metallic alloys between Au and Pd, Rh or Ag, while the formation of alloy between Au and Pt was not confirmed under the applied synthesis conditions. The formed bi-metallic alloy nanoparticles were found to be highly distributed through the mesoporous silica and the average size of the formed nanoparticles was 15–30 nm. The prepared samples were investigated to catalyze the environmentally impacted reaction of carbon monooxide (CO) oxidation to carbon dioxide (CO2). The catalytic efficiency of Ag–Au catalyst was higher than the other investigated catalysts, 100% of CO gas was converted over Ag–Au catalyst at 25 °C. Moreover, Pt–Au and Pd–Au catalysts exhibited similar activity to bare Au nanoparticles. Moreover, the stability of the four investigated catalysts was investigated by using the same catalytic sample in ten consecutive reactions without treatment, Rh–Au-TUD-1 and Pt–Au-TUD-1 exhibited the highest stability, while, Ag–Au showed partial deactivation due to the oxidation of Ag to Ag2O.

中文翻译：

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一氧化碳在包含三维二氧化硅的双金属纳米粒子上的低温氧化

摘要 在目前的研究中，利用TUD-1 介孔材料作为双金属贵金属纳米粒子的载体合成了四种新型催化剂。M-Au-TUD-1（M = Rh、Pd、Pt 和 Ag）通过应用 1Au:1M 的比例制备，总金属负载量为 2 wt%。进行了一些物理和化学表征以了解所制备催化剂的结构。表征结果表明金和钯、铑或银之间形成了双金属合金，而在所应用的合成条件下，金和铂之间合金的形成没有得到证实。发现形成的双金属合金纳米颗粒高度分布在介孔二氧化硅中，形成的纳米颗粒的平均尺寸为 15-30 nm。研究制备的样品以催化一氧化碳 (CO) 氧化为二氧化碳 (CO2) 的环境影响反应。Ag-Au 催化剂的催化效率高于其他研究的催化剂，100% 的 CO 气体在 25°C 下通过 Ag-Au 催化剂转化。此外，Pt-Au 和 Pd-Au 催化剂表现出与裸金纳米颗粒相似的活性。此外，通过在 10 个连续反应中使用相同的催化样品来研究四种研究催化剂的稳定性，Rh-Au-TUD-1 和 Pt-Au-TUD-1 表现出最高的稳定性，而 Ag-Au 表现出最高的稳定性由于 Ag 氧化成 Ag2O 而部分失活。100% 的 CO 气体在 25 °C 下通过 Ag-Au 催化剂转化。此外，Pt-Au 和 Pd-Au 催化剂表现出与裸金纳米颗粒相似的活性。此外，通过在 10 个连续反应中使用相同的催化样品来研究四种研究催化剂的稳定性，Rh-Au-TUD-1 和 Pt-Au-TUD-1 表现出最高的稳定性，而 Ag-Au 表现出最高的稳定性由于 Ag 氧化成 Ag2O 而部分失活。100% 的 CO 气体在 25 °C 下通过 Ag-Au 催化剂转化。此外，Pt-Au 和 Pd-Au 催化剂表现出与裸金纳米颗粒相似的活性。此外，通过在 10 个连续反应中使用相同的催化样品来研究四种研究催化剂的稳定性，Rh-Au-TUD-1 和 Pt-Au-TUD-1 表现出最高的稳定性，而 Ag-Au 表现出最高的稳定性由于 Ag 氧化成 Ag2O 而部分失活。