Escomel Léon, Abbott Daniel F, Mougel Victor, Veyre Laurent, Thieuleux Chloé, Camp Clément
Université de Lyon, Institut de Chimie de Lyon, Laboratory of Catalysis, Polymerization, Processes & Materials, CP2M UMR 5128 CNRS-UCB Lyon 1-CPE Lyon, CPE Lyon 43 Bd du 11 Novembre 1918, F-69616 Villeurbanne, France.
Laboratorium für Anorganische Chemie, ETH Zürich, Vladimir-Prelog-Weg 1, CH-8093 Zürich, Switzerland.
Chem Commun (Camb). 2022 Jul 21;58(59):8214-8217. doi: 10.1039/d2cc02139k.
The grafting of an iridium-aluminium precursor onto silica followed by thermal treatment under H yields small (<2 nm), narrowly distributed nanoparticles used as catalysts for methane H/D exchange. This Ir-Al/SiO catalyst demonstrated enhanced catalytic performances in comparison with the monometallic Ir/SiO analogue (TOFs of 339 h 117 h respectively), highlighting the promoting effect of aluminium. TON up to 900 is obtained after 9 hours, without evidence of catalyst deactivation, and identical performances are achieved after air exposure, underlining the good robustness of both Ir-Al/SiO and Ir/SiO catalytic materials.
将铱 - 铝前驱体接枝到二氧化硅上，然后在氢气气氛下进行热处理，可得到尺寸小（<2纳米）、分布窄的纳米颗粒，用作甲烷H/D交换的催化剂。与单金属铱/二氧化硅类似物相比，这种铱 - 铝/二氧化硅催化剂表现出更高的催化性能（分别为339 h和117 h的TOF值），突出了铝的促进作用。9小时后获得高达900的TON值，且没有催化剂失活的迹象，在空气暴露后也能实现相同的性能，这突出了铱 - 铝/二氧化硅和铱/二氧化硅催化材料的良好稳定性。
