废塑料的光热催化,通过Ni单原子位隔离效应将其转化为酸和
Shuai Yue1,2, Yixiao Liu1, Zhiyong Zhao1
1Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, People's Republic of China.
概括
太阳光热催化有效地将聚乙烯 (PE) 废物转化为酸和. 与集群相比,在 (Ni_SA/CeO_2) 上的原子分散具有更高的选择性和产量.
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.
- 可再生能源可再生能源是可再生能源.
背景情况:
- 通过太阳能回收聚乙烯 (PE) 成为有价值的化学品,在产品选择性和效率方面面临挑战.
- 中介物质的无效控制和充电动态不佳阻碍了PE光变.
研究的目的:
- 开发一种太阳能驱动的光热催化方法,用于选择性PE转化为酸和.
- 研究原子级催化剂设计在提高反应效率和选择性方面的作用.
主要方法:
- 在CeO2 (Ni_SA/CeO2) 上利用原子分散的Ni位点进行PE的太阳光热催化转化.
- 在CeO2 (Ni_NP/CeO2) 上使用Ni集群作为比较催化剂.
- 进行了涉及电子捕获,光热效应和中间反应通路的机制研究.
主要成果:
- Ni_SA/CeO2的酸产量达到331μmolh-1的酸产量,具有94.8%的选择性,优于Ni_NP/CeO2的1.6倍.
- Ni_SA/CeO2 证明了0.23 mmol h-1 的产量,具有稳定的长期性能.
- 机械学研究显示,Ni单个原子增强光热效应,抑制中间二分化,提高选择性.
结论:
- 原子级催化剂设计,特别是单个孤立的Ni原子,对于选择性PE转换至关重要.
- Ni_SA/CeO2催化剂为利用太阳能有效和选择性地利用PE废物提供了一个有前途的途径.
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