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合成原子分散的催化剂的光化学途径

Pengxin Liu¹, Yun Zhao¹, Ruixuan Qin¹

¹State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Engineering Research Center for Nano-Preparation Technology of Fujian Province, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers, and Esters, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.

Science (New York, N.Y.)

|May 14, 2016

概括

研究人员使用光化学方法开发了一种稳定,原子分散的氧化物催化剂 (Pd1/TiO2). 这种先进的催化剂在化反应中显著提高了性能, 在催化效率方面取得了突破.

科学领域:

催化剂
材料科学
纳米技术

背景情况:

原子分散的贵金属催化剂具有高性能,但由于金属负载较低而受到限制,以防止烧结.
保持孤立的金属原子对于最大化催化活性和稳定性至关重要.

研究的目的:

开发具有高金属负载的稳定,原子分散的氧化物催化剂 (Pd1/TiO2).
在化反应中研究新型Pd1/TiO2催化剂的催化活性和稳定性.

主要方法:

在以乙烯糖 (EG) 稳定的超薄TiO2纳米片上使用光化学策略制造Pd1/TiO2催化剂.
评估C=C键和的催化性能
在多个反应周期中评估催化剂的稳定性.

主要成果:

达到高达1.5%的Pd1/TiO2催化剂,克服了典型的低负载限制.
与商业Pd催化剂相比,C=C键化的催化活性增加了9倍.
在20个催化周期内没有观察到活动衰变,表明非常好的稳定性.
由于通过Pd1/TiO2-EG系统的异质H2激活,阿尔德海德化得到了超过55倍的增强.

结论:

这种光化学策略使得在TiO2纳米板上制造出高度稳定的,原子分散的催化剂,具有前所未有的金属负载.
Pd1/TiO2-EG催化剂在化反应中表现出卓越的活性和稳定性,特别是通过独特的H2激活途径进行化.
这项工作为设计下一代单原子催化剂提供了有前途的方法,

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