稳定原子分散的Au与相邻的Pt用于空间精确的分子识别
Rui Tang1, Xiangyu Xiao2, Jingyi Yao1
1Key Laboratory of Organic Compound Pollution Control Engineering (MOE), School of Environmental and Chemical Engineering, Shanghai University, Shanghai, P. R. China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|March 9, 2026
概括
引入 (Pt) 原子可以在 (CeO2) 催化剂上稳定单个金 (Au) 原子. 这种辅助邻的策略增强了与复杂分子的相互作用,以改善选择性催化.
科学领域:
- 不同质的催化剂.
- 材料科学 材料科学 材料科学
- 表面化学 表面化学
背景情况:
- 原子分散黄金 (Au) 催化剂提供了明确的活性位点,但结构稳定性不佳.
- 现有的Au催化剂与结构复杂的多功能分子 (SCMM) 相互作用有限,阻碍了选择性催化.
- 稳定单原子催化剂 (SAC) 和提高它们对复杂基质的识别是关键的挑战.
研究的目的:
- 开发一种可通用的策略,用于在 (CeO2) 支器上稳定单个Au原子.
- 通过多站点识别,增强AU催化剂和SCMM之间的相互作用.
- 为了提高SCMMs的电化学催化性能.
主要方法:
- 合成富含缺陷的CeO2支持单个AU原子修改Pt (Au1Pt1-CeO2) 的合成.
- 实验性表征 (例如,光谱,显微镜) 和计算分析 (例如,DFT).
- 使用诺夫洛素 (NOR) 作为模型的电化学催化性能评估SCMM.
主要成果:
- 通过加强Au-O轨道合和电子再分配,Pt结合通过抑制金属Au°形成来稳定Au单个原子.
- Au1Pt1-CeO2催化剂具有多中心的配置,可以与NOR的功能组 (F, -COOH, -C=O) 进行合作相互作用.
- 这导致增强的电化学催化活性和SCMMs的空间精确识别.
结论:
- 靠近辅助的策略有效地稳定了单个Au原子,并促进了SCMM的多站点识别.
- 的电子调制是稳定性的关键,这一原理可扩展到其他组金属 (PGM).
- 这项工作为设计复杂分子的强大,以识别为导向的催化剂提供了新的视角.
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