Zhang Jian, Zhu Dezhi, Yan Jianfeng, Wang Chang-An
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China.
State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China.
Nat Commun. 2021 Nov 18;12(1):6665. doi: 10.1038/s41467-021-27000-5.
Supported metal catalysts play a crucial role in the modern industry. Constructing strong metal-support interactions (SMSI) is an effective means of regulating the interfacial properties of noble metal-based supported catalysts. Here, we propose a new strategy of ultrafast laser-induced SMSI that can be constructed on a CeO-supported Pt system by confining electric field in localized interface. The nanoconfined field essentially boosts the formation of surface defects and metastable CeO migration. The SMSI is evidenced by covering Pt nanoparticles with the CeO thin overlayer and suppression of CO adsorption. The overlayer is permeable to the reactant molecules. Owing to the SMSI, the resulting Pt/CeO catalyst exhibits enhanced activity and stability for CO oxidation. This strategy of constructing SMSI can be extended not only to other noble metal systems (such as Au/TiO, Pd/TiO, and Pt/TiO) but also on non-reducible oxide supports (such as Pt/AlO, Au/MgO, and Pt/SiO), providing a universal way to engineer and develop high-performance supported noble metal catalysts.
负载型金属催化剂在现代工业中起着至关重要的作用。构建强金属-载体相互作用（SMSI）是调节贵金属基负载型催化剂界面性质的有效手段。在此，我们提出一种超快激光诱导SMSI的新策略，该策略可通过在局部界面限制电场在CeO负载的Pt体系上构建。纳米受限场本质上促进了表面缺陷的形成和亚稳态CeO的迁移。通过用CeO薄覆盖层覆盖Pt纳米颗粒并抑制CO吸附来证明SMSI。该覆盖层对反应物分子具有渗透性。由于SMSI，所得的Pt/CeO催化剂对CO氧化表现出增强的活性和稳定性。这种构建SMSI的策略不仅可以扩展到其他贵金属体系（如Au/TiO、Pd/TiO和Pt/TiO），还可以扩展到不可还原的氧化物载体（如Pt/AlO、Au/MgO和Pt/SiO），为设计和开发高性能负载型贵金属催化剂提供了一种通用方法。
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