Pt/CeO₂ catalysts were prepared with 0.5 and 1 wt% of Pt loadings by an alcohol-reduction process using a solution of ethylene glycol and water as a reducing agent and solvent. The obtained catalysts were characterized by energy-dispersive X-ray spectroscopy, X-ray diffraction, and transmission electron microscopy. Transmission electron micrographs showed Pt nanoparticles with average sizes of 2.2 and 2.4 nm for Pt content of 0.5 and 1 wt%, respectively. The preferential oxidation of carbon monoxide in hydrogen-rich stream (CO-PROX reaction) was studied in the temperature range of 25–150 °C. Pt/CeO₂ catalysts showed maximum CO conversions in the range of 80–98% and CO₂ selectivity in the range of 50–70% at 50 °C.

中文翻译：

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通过醇还原工艺制备的活性Pt / CeO 2催化剂，用于低温CO-PROX反应

通过使用乙二醇和水的溶液作为还原剂和溶剂的醇还原法，以0.5和1重量％的Pt负载量制备Pt / CeO ₂催化剂。通过能量分散X射线光谱，X射线衍射和透射电子显微镜对所获得的催化剂进行表征。透射电子显微照片显示，Pt含量分别为0.5和1 wt％的Pt纳米颗粒的平均尺寸为2.2和2.4 nm。在25–150°C的温度范围内研究了富氢物流中一氧化碳的优先氧化（CO-PROX反应）。在50°C下，Pt / CeO ₂催化剂的最大CO转化率在80-98％范围内，CO ₂选择性在50-70％范围内。