低温氧化还原活性和酒精无氧化性能在Cu和Ru结合的Ceria催化剂上
Chaoqi Chen1, Satoru Ikemoto1, Gen-Ichi Yokota1
1Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan. muratsugu.satoshi.a5@f.mail.nagoya-u.ac.jp.
Physical chemistry chemical physics : PCCP
|May 30, 2024
概括
铜和联合的氧化 (Cu0.18Ru0.05CeO) 呈现出增强的低温氧化还原和催化醇无氧化性能. 这种材料从醇中选择性地产生酸,而减少的Cu/Ru物种是其活性的关键.
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.
- 无机化学 无机化学
背景情况:
- 基于氧化 (CeO) 的材料因其氧化还原特性而受到广泛研究.
- 过渡金属兴奋剂可以显著改变氧化的催化和氧化还原行为.
- 酒精无氧化是化合成的重要工业过程.
研究的目的:
- 为了合成和表征转化金属结合的氧化 (Cu0.18Ru0.05CeO).
- 为了研究合成材料的低温氧化还原性能 (<423 K).
- 为了评估Cu0.18Ru0.05CeO在醇氧化中的催化性能.
主要方法:
- 在过渡金属中含有氧化的制备 (Cu0.18Ru0.05CeO).
- 用温度编程的减氧/氧化 (H2/O2) 来研究氧化还原行为.
- 在现场X射线吸收细结构 (XAFS) 探测金属物种化和相互作用.
- 对醇无氧化发生催化试验.
主要成果:
- 该Cu0.18Ru0.05CeO材料证明了Cu,Ru和Ce在低温 (<423K) 上的可逆氧化还原行为.
- 鲁物种促进了铜和氧化物的激活,降低了它们的还原温度.
- 催化剂从醇中选择性地产生酸,而减少的形式显示出更高的活性.
结论:
- 在氧化中Cu和Ru的协同集成增强了低温氧化还原和催化无氧化性能.
- 类物种促进醇的转化,而铜类物种对于选择性酸生产至关重要.
- 降解状态的Cu0.18Ru0.05CeO对于无氧化反应特别活跃.
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