中国科学院大连化学物理研究所包信和团队开发出氧化物载体与金属的相互作用是惰性的，而与氧化物的相互作用是活性的，反之亦然。相关论文于2025年4月9日发表于国际顶尖学术期刊《美国化学会杂志》上。

在这项工作中，小组发现小Pt在含H₂和含O₂气氛下都可以很好地稳定在CeO₂上，但在SiO₂上发生烧结，这表明CeO₂在Pt -载体相互作用中是活跃的，而SiO2是惰性的。另一方面，SiO₂负载的Co氧化物（CoO_x）无论在空气中还是在CO₂加氢成Co的过程中都能保持低价的Co²⁺态，表明CoO_x与SiO₂的相互作用很强。

而CoO_x层与CeO₂的相互作用较弱，在CO₂加氢反应生成CH₄过程中容易还原为金属Co。其中，SiO₂是活性的，而CeO₂对于CoO_x -载体的相互作用是惰性的，这与Pt/氧化物体系的常识相反。对不同氧化物载体上Pt和CoOx纳米催化剂稳定性行为的系统研究表明，氧化物载体的还原性可以用来描述催化剂-载体相互作用。具有高还原性或低金属-氧键强度的氧化物载体与Pt等金属相互作用强，具有较高的亲金属性。相反，还原性低或金属-氧键强度高的氧化物载体与CoO_x等氧化物的相互作用强，具有较高的亲氧性。

据悉，负载型金属或氧化物纳米结构催化了许多原位反应，其中金属或氧化物覆盖层与其载体的相互作用可以对催化性能产生实质性影响。

附：英文原文

Title: Oxide Support Inert in Its Interaction with Metal but Active in Its Interaction with Oxide and Vice Versa

Author: Cui Dong, Rongtan Li, Zhenping Qu, Yamei Fan, Jianyang Wang, Xiangze Du, Chengxiang Liu, Xiaohui Feng, Yanxiao Ning, Rentao Mu, Qiang Fu, Xinhe Bao

Issue&Volume: April 9, 2025

Abstract: Supported metal or oxide nanostructures catalyze many industrial reactions, where the interaction of metal or oxide overlayer with its support can have a substantial influence on catalytic performance. In this work, we show that small Pt species can be well stabilized on CeO2 under both H2-containing and O2-containing atmospheres but sintering happens on SiO2, indicating that CeO2 is active whereas SiO2 is inert in Pt–support interaction. On the other hand, Co oxide (CoOx) supported on SiO2 can maintain a low-valence Co2+ state both in air and during CO2 hydrogenation to CO, indicating a strong interaction of CoOx with SiO2. However, the CoOx overlayer has a weak interaction with CeO2 and is easily reduced to metallic Co during the CO2 hydrogenation reaction producing CH4. Thus, SiO2 is active, but CeO2 is inert for CoOx–support interaction, which is counter to the common sense from the Pt/oxide systems. Systematic studies in stability behaviors of Pt and CoOx nanocatalysts supported on various oxides show that the reducibility of the oxide supports can be used to describe the catalyst–support interaction. Oxide supports with high reducibility or low metal–oxygen bond strength interact strongly with Pt and other metals, showing high metalphilicity. Conversely, oxide supports with low reducibility or high metal–oxygen bond strength have strong interaction with CoOx and other oxides, having high oxidephilicity.

DOI: 10.1021/jacs.4c17075

Source: https://pubs.acs.org/doi/abs/10.1021/jacs.4c17075