创建一个高度活跃的小基催化剂,来自铜层双氧化物,支持α-Al2O3,用于无受体的酒精脱
Febi Yusniyanti1, Takayoshi Hara1, Kohei Makishima2
1Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University, 1-33 Yayoi, Inage, Chiba, 263-8522, Japan.
一个新的铜氧化物催化剂支持氧化物被合成为酒精脱. 这种催化剂表现出高活性和稳定性,在反应过程中铜纳米粒子在现场形成.
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.
- 纳米技术纳米技术
背景情况:
- 层状双氧化物 (LDH) 是混合金属氧化物的多功能前体.
- 开发有效的催化剂,用于无受体酒精脱,对于绿色化学至关重要.
- 在惰性表面上支持活性物种可以提高催化性能和稳定性.
研究的目的:
- 在α-表面合成高度分散的铜-层复合氧化物.
- 为了研究材料在化后的结构变化.
- 为了评估由此产生的铜氧化物对酒精脱的催化活性.
主要方法:
- 合成CuAl LDH@α-Al2O3.3.的共同沉方法
- 在1073K的空气中化.
- 使用粉末X射线衍射 (XRD) 和X射线吸收近边缘结构 (XANES) 的表征.
- 现场温度编程同步仪XRD (tp-SXRD) 用于监测结构变化.
- 催化试验用于各种酒精的无受体脱.
主要成果:
- 成功合成了 CuAl LDH@α-Al2O3 具有高分散性.
- 化在α-Al2O3表面产生CuO纳米粒子和CuAl2O4 (CuAlO@α-Al2O3).
- 层层的结构在473K消失;氧化物阶段在更高的温度下形成.
- CuAlO@α-Al2O3对酒精脱具有很高的活性,对于1-乙醇的营业额 (TON) 为163.
- 观察到CuO在反应过程中从CuO中在现场形成活性Cu0物种.
结论:
- CuAlO@α-Al2O3催化剂对于无受体的酒精脱非常有效.
- 与未得到支持的催化剂相比,支持显著增强了催化活性.
- 在现场将CuO降解为活性Cu0物种,简化了催化过程.
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