分散的稀有金属对Pt/CeO2的协同作用,用于用CO2进行氧化脱
Jiulong Wang1, Fang Wang1, Longyang Li1
1State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University (NPU), Shaanxi Joint Laboratory of Graphene Xi'an 710072 China hongqiang.wang@nwpu.edu.cn.
RSC advances
|January 27, 2025
概括
在Pt/CeO2催化剂上分散的稀有金属氧化物覆盖层显著增强了用CO2氧化的氧化脱,将的选择性提高到88.24%,并使工业过程更加绿色.
科学领域:
- 催化剂是一种催化剂.
- 绿色化学 绿色化学
- 材料科学 材料科学 材料科学
背景情况:
- 用二氧化碳 (CO2-ODP) 氧化氧化是一种可持续的途径.
- 在氧化 (Pt/CeO2) 催化剂上支金的催化剂显示出希望,但由于非特异性键激活,选择性面临挑战.
- 在Pt/CeO2上同时发生的C-H,C-C和C-O键裂变,可能会阻碍烯生产的选择性C-H激活.
研究的目的:
- 为CO2-ODP反应开发高度选择性的催化剂.
- 为了研究分散的稀有金属氧化物 (SRO) 覆盖层对Pt/CeO2催化剂的影响.
- 了解增强催化性能背后的机制.
主要方法:
- 用SRO修改的Pt/CeO2催化剂的合成 (SRO=Ga,In).
- 在CO2-ODP反应中测试催化剂性能,测量和CO2转化以及的选择性.
- 进行机制研究以阐明SRO覆盖层的作用.
主要成果:
- SRO-Pt/CeO2催化剂显著提高了对CO2-ODP的活性和选择性.
- 使用SRO-Pt/CeO2.2,气转化达到38.13%,二氧化碳转化达到67.72%.
- 烯的选择性从33.28%大幅增加到88.24%,相当于最先进的PtSn/CeO2催化剂.
结论:
- 在 Pt/CeO2 上的 SRO 覆盖层有效调节催化剂的表面特性.
- SRO 覆盖层增强了 C-H 债券的激活,并平衡了 C-H/C-O 债券的分离率,从而实现了更高的选择性.
- 这种SRO修改的Pt/CeO2策略为通过CO2-ODP的高度选择性生产提供了一条新的途径.
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