Pt基团簇催化剂设计策略在丙烷脱氢中的研究进展

Advances in Pt-based cluster catalyst design strategies for propane dehydrogenation

丙烷脱氢制丙烯(PDH)技术作为一种高效的丙烯生产途径,具备满足全球日益增长丙烯需求的潜力。然而,PDH反应的高吸热性限制了平衡转化,即便是高活性和高选择性的Pt基催化剂在高温条件下也会由于烧结和结焦问题而失活,进而影响催化剂的稳定性和寿命。综述了Pt基团簇催化剂的几何结构和电子特性对催化性能的影响,探讨了提升Pt基团簇稳定性的设计策略。还总结了从传统液相合成、后处理技术到原子层沉积(ALD)等方法在调控Pt基催化剂结构及抑制失活方面的最新进展。最后,展望了通过ALD技术设计结构明确的Pt基催化剂的潜力,以深入理解催化剂活性位点的性质,并探讨在分子筛限域中进一步稳定Pt基团簇的可能性。这些研究方向为开发新一代高效、稳定的PDH催化剂提供了新的思路与启示。

Propane dehydrogenation(PDH)technology presents an efficient route to meet the increasing global demand for propylene.However,the high endothermic nature of the PDH reaction limits equilibrium conversion,and even highly active and selective Pt-based catalysts are prone to deactivation at elevated temperatures due to sintering and coking,affecting their stability and lifespan.how the geometric structure and electronic properties of Pt-based cluster catalysts impact their catalytic performance was examined and strategies to enhance the stability of these clusters was discussed.recent advancements in controlling the structure of Pt-based catalysts was summarized and preventing deactivation through various approaches,including traditional liquid-phase synthesis,post-processing techniques,and atomic layer deposition(ALD).Additionally,highlight future research directions focusing on designing well-defined Pt-based catalysts with ALD technology,aiming to gain a deeper understanding of active site characteristics and exploring methods to further stabilize Pt clusters within molecular sieve-constrained environments.These insights provide new perspectives for developing the next generation of efficient and stable PDH catalysts.