With the surge of shale gas, propane dehydrogenation becomes increasingly important to synthesize propylene. Herein, a new type of ordered PtSnZn intermetallic clusters (∼0.9 nm) supported on Al₂O₃ was synthesized by a stepwise approach including electrostatic adsorption and temperature-programmed reduction. The structure of the PtSnZn clusters results from a kinetically controlled process, and Pt atoms in the PtSnZn clusters are well isolated by Sn and Zn with Pt−Sn and Pt−Zn pairs. The PtSnZn/Al₂O₃ catalyst exhibits excellent catalytic performance for propane dehydrogenation, which achieves ∼100% propylene selectivity and keeps a high propane conversion (>40%) during stability testing. The catalytic performance of PtSnZn/Al₂O₃ is also significantly higher than that of Pt/Al₂O₃, PtSn/Al₂O₃, and PtZn/Al₂O₃. Experiments and theoretical calculations indicate that the Sn 5p and Zn 4s orbitals are hybridized with Pt 5d by forming Pt−Sn and Pt−Zn pairs, which leads to the d band center of Pt deviating from Fermi level (−2.81 eV). The shift of the Pt d band center significantly decreases the adsorption energy of propylene and prohibits further dehydrogenation, resulting in high propylene selectivity and stability.

随着页岩气的激增，丙烷脱氢对于合成丙烯变得越来越重要。在此，通过包括静电吸附和程序升温还原在内的逐步方法合成了负载在 Al ₂ O ₃上的新型有序 PtSnZn 金属间簇 (~0.9 nm) 。PtSnZn 团簇的结构由动力学控制过程产生，PtSnZn 团簇中的 Pt 原子被具有 Pt-Sn 和 Pt-Zn 对的 Sn 和 Zn 很好地隔离。PtSnZn/Al ₂ O ₃催化剂表现出优异的丙烷脱氢催化性能，可实现～100% 的丙烯选择性，并在稳定性测试中保持较高的丙烷转化率（>40%）。PtSnZn/Al的催化性能₂ O ₃也明显高于Pt/Al ₂ O ₃、PtSn/Al ₂ O ₃和PtZn/Al ₂ O ₃。实验和理论计算表明，Sn 5p 和 Zn 4s 轨道通过形成 Pt-Sn 和 Pt-Zn 对与 Pt 5d 杂化，导致 Pt 的 d 带中心偏离费米能级 (-2.81 eV)。Pt d 带中心的移动显着降低了丙烯的吸附能并阻止进一步脱氢，从而导致丙烯的高选择性和稳定性。