光催化H2生成:基于Pt-TCPP平面吸附在TiO2上的单原子共催化剂的控制和优化分散
Shanshan Qin1, Nikita Denisov1, Hyesung Kim1
1Department of Materials Science WW4-LKO, Friedrich-Alexander-University of Erlangen-Nuremberg, Martensstrasse 7, 91058, Erlangen, Germany.
Angewandte Chemie (International ed. in English)
|January 18, 2024
概括
研究人员开发了一种方法,在TiO2表面精确控制单个原子 (SAs),以增强光催化生成. 这种技术优化了SA密度,以实现高效和稳定的催化活性.
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:
- 在半导体表面实现均的单原子 (SA) 分布对于光催化是至关重要的,但也是具有挑战性的.
- 单个原子 (SAs) 在光催化 (H2) 生产中起到有效的联合催化剂的作用.
研究的目的:
- 开发一种方法,在TiO2表面上对单个原子 (SAs) 进行空间控制的装饰.
- 为了优化SA表面密度,增强光催化H2进化.
主要方法:
- 采用四氧化 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - (TCPP) 和其模拟物 (Pt-TCPP) 在解剖酶TiO2.2上进行平面吸附.
- 在共吸附过程中通过调整 Pt-TCPP 与 TCPP 的比率来控制表面 Pt SA 密度.
- 在空气中采用热处理来保持SA分布和状态.
主要成果:
- 证明了对Pt SA表面密度的精确控制,最高可达2.6×10^5原子μm^-2.
- 确定了一个优化的SA密度和Pt状态,用于有效的光催化H2演化.
- 证实了SA分布和热处理后状态的稳定性.
结论:
- 协同吸附方法使得TiO2.2上可调和且分散良好的单个原子成为可能.
- 优化 Pt SA 负载显著提高光催化 H2 生产效率.
- 开发的方法为单原子催化提供了一个稳定有效的平台.
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