制备具有高原子利用效率的多站点催化剂的定向光子诱导组装策略
Xiaoqiang An1, Tingcha Wei1,2, Peijia Ding3
1Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China.
Journal of the American Chemical Society
|January 6, 2023
概括
一种新的导向光子诱导组装策略通过在TiO2上创建多个黄金位点来增强单原子催化剂 (SAC). 这种方法显著提升了进化活动,为先进的催化提供了一个新的平台.
科学领域:
- 材料科学
- 催化剂
- 纳米技术
背景情况:
- 单原子催化 (SAC) 在精确调节原子级活点方面面临挑战.
- 整合多种反应场所是克服当前催化系统局限性的有希望的策略.
研究的目的:
- 为提高单原子催化剂 (SAC) 的原子利用效率制定新战略.
- 使用光子诱导组装方法在二氧化 (TiO2) 基板上构建多种金 (Au) 位.
主要方法:
- 使用导向光子诱导组合 (SPA) 策略.
- 使用Na+作为Au单个原子向TiO2的导向剂.
- 利用光诱导的电子转移进行Au纳米集群的自组装,并利用等离子体近场和肖特基结合效应.
主要成果:
- 在进化活动中取得了显著的改善,
- 对双位点光催化剂的高转换频率 (TOF) 为1533h-1.
- 通过等离子近场,Schottky结和氧空隙的协同作用来增强电荷分离.
结论:
- 该战略有效地提高了SAC的原子利用效率和催化性能.
- 开发的双位点光催化剂在模拟太阳光下显示出优异的演变活性.
- 该SPA方法具有多功能性,可以扩展到合成各种金属合纳米结构,用于各种催化应用.
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