Guo Wei, Zhao Guoqiang, Huang Zixiang, Luo Zhouxin, Zheng Xusheng, Gao Mingxia, Liu Yongfeng, Pan Hongge, Sun Wenping
School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310058, P. R. China.
Engineering Research Center of Nano-Geomaterials of Ministry of Education, China University of Geosciences, Wuhan, 430074, P. R. China.
Angew Chem Int Ed Engl. 2025 Jan 10;64(2):e202414516. doi: 10.1002/anie.202414516. Epub 2024 Oct 24.
Strong metal-support interaction (SMSI) plays a vital role in tuning the geometric and electronic structures of metal species. Generally, a high-temperature treatment (>500 °C) in reducing atmosphere is required for constructing SMSI, which may induce the sintering of metal species. Herein, we use molten salts as the reaction media to trigger the formation of high-intensity SMSI at reduced temperatures. The strong ionic polarization of the molten salt promotes the breakage of Ti-O bonds in the TiO support, and hence decreases the energy barrier for the formation of interfacial bonds. Consequently, a high-intensity SMSI state is achieved in TiO supported Ir nanoclusters, evidenced by a large number of Ir-Ti bonds at the interface, at a low temperature of 350 °C. Moreover, this method is applicable for triggering SMSI in various supported metal catalysts with different oxide supports including CeO and SnO. This newly developed SMSI construction methodology opens a new avenue and holds significant potential for engineering advanced supported metal catalysts toward a broad range of applications.
强金属-载体相互作用（SMSI）在调节金属物种的几何结构和电子结构方面起着至关重要的作用。通常，构建SMSI需要在还原气氛中进行高温处理（>500°C），这可能会导致金属物种烧结。在此，我们使用熔盐作为反应介质，在较低温度下引发高强度SMSI的形成。熔盐的强离子极化促进了TiO载体中Ti-O键的断裂，从而降低了界面键形成的能垒。因此，在350°C的低温下，TiO负载的Ir纳米团簇中实现了高强度的SMSI状态，界面处大量的Ir-Ti键证明了这一点。此外，该方法适用于在具有不同氧化物载体（包括CeO和SnO）的各种负载型金属催化剂中引发SMSI。这种新开发的SMSI构建方法开辟了一条新途径，对于设计用于广泛应用的先进负载型金属催化剂具有巨大潜力。
