Perovskite-Derived Pt–Ni/Zn(Ni)TiO3/SiO2 Catalyst for Propane Dehydrogenation to Propene
Platinum-based catalysts are promising materials for the propane dehydrogenation (PDH). The Pt sintering and carbon deposition are still the urgent problems to be solved in this system. This paper investigates an investigation of effect of perovskite-type oxide (PTO) lattice confinement on the catalytic performance of Zn(Ni)TiO3/SiO2 supported Pt–Ni bimetallic catalysts for PDH. The supported PTO precursors and derived catalysts were analyzed by XRD, H2-TPR, TEM, XPS and TG techniques. The results show that the Pt–Ni alloy nanoparticles (NPs) are formed and highly dispersed on Zn(Ni)TiO3/SiO2. The optimized Pt loading amount is 0.4 wt%, which enhances the propane conversion to 38.6% and propene selectivity of 96.6%. The superior catalytic performance and anti-sintering and carbon deposition ability of Pt–Ni/Zn(Ni)TiO3/SiO2 catalyst are ascribed to the addition of appropriate Pt amount, which is beneficial to being confined in PTO lattice and building the abundant Pt–Ni alloy sites and moderate Pt–Ni interaction. The unconfined Pt coming from excessive Pt addition and impregnated Pt can result in Pt sintering and carbon formation.
KeywordsPerovskite lattice confinement Propane dehydrogenation Pt–Ni alloy Carbon deposition Pt sintering
This study was supported by the National Natural Science Foundation of China (No. 21776214) and State Key Laboratory of Chemical Resource Engineering.
Compliance with Ethical Standards
Conflict of interest
The authors declare no conflict of interest.
- 3.Mcgregor J, Huang ZY, Parrott EPJ, Zeitler JA, Nguyen KL, Jeremy MR, Rawson JM, Carley A, Hansen TW, Tessonnier JP, Su DS, Teschner D, Vass EM, Knop-Gericke A, Schlogl R, Gladden LF (2010) Active coke: carbonaceous materials as catalysts for alkane dehydrogenation. J Catal 269:329–339CrossRefGoogle Scholar
- 21.Dai H, Qiu YP, Dai HB, Wang P (2018) Ni–Pt/CeO2 loaded on granular activated carbon: an efficient monolithic catalyst for controlled hydrogen generation from hydrous hydrazine. ACS Sustain Chem Eng 26:1–23Google Scholar