Abstract

Identifying the activity origin of noble metal-based catalysts is extremely important for fundamental research and practical application. We report single Au atoms on Co3O4 (Au1/Co3O4 SAC) exhibit excellent activity and stability for CO oxidation and the activity origin of Au1/Co3O4 SAC is an active area centered by Au1 atom with one nearby Co and O atoms (and/or O vacancy). The turnover frequency is 3.1 s-1 at -75 oC, to our knowledge, which makes Au1/Co3O4 one of the most active Au catalysts for CO oxidation. The activity can be maintained after 10 cycles of temperature-programmed reaction from -100 to 300 oC or storage in air for 1 year, indicating the high stability of Au1/Co3O4 SAC. The isotope, X-ray absorption, kinetics, and DFT results further demonstrate CO2 is produced through two reaction pathways, following Langmuir-Hinshelwood (predominant) and Mars-van Krevelen (minor) mechanisms, respectively. The present findings pave the way for better understanding supported metal catalysts.

https://pubs.acs.org/doi/10.1021/acscatal.0c01303

感谢娄教授，我这个挂名有点“名不符实”

这篇文章见证了娄从学生成长为教授的整个历程，走过了数个岁月的“磨练”和“洗礼”，好在Au总是会发光的，且一旦发光再也不会褪色。

祝娄教授回国后的科研顺风顺水、出更多扎实的成果，更重要的是“带我一起飞”