This work investigated the effect of Pt nanoparticles embedded into CeO₂ (Pt@CeO₂) and CeZrO₂ (Pt@CeZrO₂) on the carbon removal mechanism for the dry reforming of methane, in comparison to impregnated Pt/CeO₂. Morphological and structural characterization by TEM and Raman spectroscopy showed that Pt sintering is suppressed on both structures and the doping with Zr led to the CeZrO₂ solid solution formation. A combination of TPR, oxygen isotopic exchange and DRIFTS measurements demonstrated that embedded Pt nanoparticles interact more strongly with ceria than supported Pt, and as a consequence, reactive lattice oxygen becomes more abundant on the catalyst surface, promoting the mechanism of carbon gasification over Pt nanoparticle. The low availability of oxygen species on Pt/CeO₂ resulted in higher carbon formation, as demonstrated by TPO analysis. Therefore, the Pt@CeO₂ and Pt@CeZrO₂ catalysts were more resistant to coke formation due to the higher presence of reactive oxygen species at the metal-support interface, promoting the balance between the rates of carbon formation and carbon gasification over Pt nanoparticle.

与浸渍的Pt / CeO ₂相比，这项工作研究了嵌入CeO ₂（Pt @ CeO ₂）和CeZrO ₂（Pt @ CeZrO ₂）中的Pt纳米颗粒对甲烷干重整的脱碳机理的影响。通过TEM和拉曼光谱的形态和结构表征表明，在两种结构上均抑制了Pt烧结，并且Zr的掺杂导致了CeZrO _2。固溶体的形成。TPR，氧同位素交换和DRIFTS测量的结合表明，包埋的Pt纳米粒子与二氧化铈的相互作用比负载的Pt更强，因此，反应性晶格氧在催化剂表面上变得更加丰富，从而促进了碳气化的机理超过了Pt纳米粒子。 。TPO分析表明，Pt / CeO ₂上氧种类的低可用性导致较高的碳形成。因此，Pt @ CeO ₂和Pt @ CeZrO ₂催化剂对焦炭形成的抵抗力更高，因为在金属-载体界面上存在更高的活性氧种类，从而促进了碳形成速率与Pt纳米颗粒上的碳气化速率之间的平衡。 。