清源创新实验室鲍晓军研究组取得一项新突破。他们的最新研究提出了高耐久丙烷脱氢用自再生Pt/Ge-MFI沸石。该研究于2025年4月10日发表于国际一流学术期刊《科学》杂志上。

研究团队发现多种Pt前驱体在Ge-MFI分子筛中自发分散，与Ostwald成熟现象相反，生成了自再生的Pt/Ge-MFI丙烷脱氢催化剂。这些催化剂在还原反应和氧化再生条件下可逆地在铂原子和铂单原子之间切换。这种环境适应性使它们能够在丙烷脱氢的110多个反应再生循环中完全自我再生。当暴露在800摄氏度的空气中暴露10天后，它们表现出前所未有的抗烧结性。这种自发金属分散在锗沸石上的方法是制造各种铑、钌、铱和钯金属催化剂的一种既灵活又通用的方法。

据悉，负载型贵金属催化剂通常在恶劣的条件下工作，包括在还原和氧化气氛之间切换，引发催化剂结构的不可逆转变，从而导致永久失活。

附：英文原文

Title: A self-regenerating Pt/Ge-MFI zeolite for propane dehydrogenation with high endurance

Author: Huizhen Hong, Zhikang Xu, Bingbao Mei, Wende Hu, Paolo Fornasiero, Chuanming Wang, Tinghai Wang, Yuanyuan Yue, Tiesen Li, Chen Yang, Qingyan Cui, Haibo Zhu, Xiaojun Bao

Issue&Volume: 2025-04-10

Abstract: Supported noble metal cluster catalysts are typically operated under severe conditions involving switches between reducing and oxidizing atmospheres, causing irreversible transformation of catalyst structure and thereby leading to permanent deactivation. We discovered that various Pt precursors spontaneously disperse in Ge-MFI zeolite, which opposes the Ostwald ripening phenomenon, producing self-regenerating Pt/Ge-MFI catalysts for propane dehydrogenation. These catalysts reversibly switch between Pt clusters and Pt single-atoms in response to reducing reaction and oxidizing regeneration conditions. This environmental adaptability allows them to completely self-regenerate over 110 reaction-regeneration cycles in propane dehydrogenation. They exhibited unprecedented sintering-resistance when exposed to air at 800°C for 10 days. Such spontaneous metal dispersion in Ge-zeolites is a robust and versatile methodology for fabricating various Rh, Ru, Ir and Pd cluster catalysts.

DOI: adu6907

Source: https://www.science.org/doi/10.1126/science.adu6907