本研究展示了如何通过蒸汽处理（750°C）活化氧化铈（CeO2）上原子分散的离子铂（Pt2+ ），使其在具有出色的水热稳定性的同时，实现实现一氧化碳（CO）低温氧化活性的目标。 在 Pt2+ 附近的 CeO2上形成了一种新型活性位点，从而提高了反应活性。

2013年3月1日 · In particular, the amount of active oxygen released at 200–400 ï‚°C plays an important role in improving combustion performance. Doping CeO2 with structure promoter metals will mainly improve its moderate†temperature redox properties, which leads to a higher combustion rate without affecting soot ignition temperature.

近日， 大连理工大学曲振平教授团队 在 ACS Catalysis 上以题为 “Construction of CuO/CeO2 Catalysts via the Ceria Shape Effect for Selective Catalytic Oxidation of Ammonia” 发表了最新成果。 报道了以纳米棒和立方体CeO2为载体的CuO/CeO2催化剂用于选择性催化氧化氨气，Cu/Ce-NR催化剂的 (T100 = 240°C, N2 selectivity > 90%, Ea = 37.18 kJ mol–1 )催化性能明显高于Cu/Ce-NC (T100 = 270°C, N2 selectivity > 90%, Ea =86.57 kJ mol–1 )。

2024年11月4日 · Pt/CeO 2 catalysts were studied depending on Pt loading using TPR-H 2 method. TPR-H 2 curves are capable to distinguish Pt 2+ -SA sites and PtOx cluster. Abnormally narrow peaks (ANCP-H 2) were observed due to 2D- and 3D-PtO x clusters. ANCP-H 2 are well simulated on the base of the autocatalytic stages of PtO x reduction.

2024年10月8日 · In this study, we evaluated the kinetics of H2 consumption over CeO2 and Pt/CeO2 with varying Pt loadings and structures to identify the elementary steps probed by H2-TPR. Literature often attributes changes in H2-TPR characteristics with Pt addition to increased CeO2 reducibility.

2020年7月15日 · Herein, a modified ordered porous catalyst with high coke-resistance performance was developed by introducing oxygen vacancies (OVs) into CeO2 through simple redox and steam treatment (ARCeO 2), and applied in efficiently photothermocatalytic degradation of VOCs.

... reduction (H2-TPR) analysis has been conducted to investigate the reduction behavior of CeO2 supports and Co/CeO2 catalysts, as shown in Figure 9. The centers of the reduction peaks of...

2025年3月10日 · Cerium dioxide (CeO2) with different morphologies was synthesized via a hydrothermal method and applied to the carbonylation of glycerol with CO2. Subsequent characterization through H2-TPR and catalytic activity tests demonstrated that CeO2 nanorods exhibited the highest oxygen storage/release capacity as well as enhanced catalytic performance compared to other morphologies. CeO2 nanorods ...

2023年5月16日 · H2-TPR是指在一定温度范围内，将催化剂和氢气充分混合，再升高温度，观察氢气被催化剂表面吸附和还原反应的程度。 在CeO2上进行H2-TPR实验可以得到以下特征：

Three Ru/CeO2 catalysts with different morphologies of CeO2 (cube spheres, microspheres and nano rods) were used to evaluate the support-morphology-dependent ammonia synthesis activity.