近日，天津大学巩金龙团队实现了用原子萃取法充分利用贵金属进行丙烷脱氢。这一研究成果于2025年9月25日发表在《科学》杂志上。

最大限度地利用贵金属的原子是高效工业催化的关键。

研究组证明了通过原子萃取可以实现丙烷脱氢（PDH）的最小铂（Pt）负载。当Pt与铜（Cu）的负荷较低时，二氧化硅或其他氧化物载体上的还原形成了纳米颗粒（NPs），其中Pt主要分散在体中。在合金中加入锡（Sn）导致表面形成Pt₁Sn₁二聚体。与Cu相比，Sn的原子半径更大，将其推向表面，与Pt的相互作用更强，将其从体相中抽离出来。单金属Pt原子稳定在完全开放的表面上，导致几乎100%的表面暴露。这种结构降低了丙烷脱氢的铂热，提高了催化稳定性。

附：英文原文

Title: Full utilization of noble metals by atom abstraction for propane dehydrogenation

Author: Guodong Sun, Ran Luo, Donglong Fu, Kexin Wu, Xianhui Wang, Xiaoqing Bian, Zhenpu Lu, Xin Chang, Zhi Wang, Siwei Huang, Yihan Zhu, Jihan Zhou, Sai Chen, Chunlei Pei, Zhi-Jian Zhao, Jinlong Gong

Issue&Volume: 2025-09-25

Abstract: Maximizing atomic utilization of noble metals is crucial for efficient industrial catalysis. We demonstrate that minimal platinum (Pt) loading for propane dehydrogenation (PDH) can be achieved through atom abstraction. At low loadings of Pt with copper (Cu), reduction over silica or other oxide supports formed nanoparticles (NPs) with Pt mainly dispersed in the bulk. Addition of tin (Sn) to the alloy led to formation of surface Pt1Sn1 dimers. The larger atomic radius of Sn compared to Cu drove it to the surface, and its stronger interactions with Pt abstracted it from the bulk. Single metallic Pt atoms were stabilized on fully open surfaces, resulting in nearly 100% surface exposure. This configuration reduced Pt usage by one order of magnitude for propane dehydrogenation and improved catalytic stability.

DOI: adw3053

Source: https://www.science.org/doi/10.1126/science.adw3053