形态依赖于Cu+的稳定和金属支相互作用控制了对Cu/CeO的化的催化转移化
Yuan Gong1, Lingshuang Hu1, Yingdong Zhou1
1College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China.
催化剂形态显著影响了furfural到furfuryl酒精的转移化. 多面体Cu/CeO2催化剂由于优化氧空位和金属支相互作用,表现出卓越的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 化学工程是化学工程的重要组成部分.
背景情况:
- 催化转移化 (CTH) 对于生物质价值化至关重要.
- 醇 (FAL) 转化为醇 (FOL) 是一个关键步骤.
- 了解催化剂形态效应对于优化CTH至关重要.
研究的目的:
- 研究CeO2支形态对FAL CTH的Cu/CeO2催化剂的影响.
- 为了将催化剂特性 (氧气空缺,金属支相互作用,酸度) 与催化性能相关联.
- 为生物质转化设计高效的基于Cu的催化剂.
主要方法:
- 合成具有明显CeO2形态 (棒,立方体,多面体) 的Cu/CeO2催化剂.
- 催化剂性质的表征:表面积,O-空度,金属支相互作用,Cu氧化状态,表面酸度.
- 在FAL CTH到FOL中对催化性能的评估.
主要成果:
- CeO2形态决定了O-空隙度,金属支相互作用和表面酸度.
- 在Cu/CeO2-P (多面体) 中,表现出最大的表面积,Cu (111) /(200) 面暴露,O-空隙密度和Cu+物种.
- /CeO2-P表现出强烈的金属支相互作用,增强酸度,导致97.6%的FAL转化和98.5%的FOL选择性.
结论:
- CeO2形态是调整Cu/CeO2催化剂电子和催化性能的一个关键因素.
- +-OV-Ce3+界面结构和/CeO2-P中增强的酸度促进了高效的CTH.
- 这项研究为设计用于生物质价值化先进的基于的催化剂提供了见解.
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