Self‐Anticoking of a Cobalt Surface by Subsurface Oxygen in the Fischer–Tropsch Synthesis. Issue 14 (14th February 2017)

• Record Type: Journal Article
• Authors: Xu, Lingshun; Jin, Yuekang; Wu, Zongfang; Xiong, Feng; Huang, Weixin
• Is Part Of: Chemistry. Volume 23:Issue 14(2017)
• Page Start: 3262
• Page End: 3266
• Publication Date: 2017-02-14
• Subjects: carbidic carbon -- graphitic carbon -- model catalysts -- cobalt -- surface chemistry; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201605577
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: Understanding the fundamental processes taking place on Co surfaces during the Fischer–Tropsch (FT) synthesis is of great interest and importance. We herein report a self‐anticoking mechanism of a cobalt surface by subsurface oxygen. The active carbidic carbon species for FT synthesis tends to transform into the inactive graphitic carbon species on clean Co(0001) and poisons the Co surface. Subsurface atomic oxygen on Co(0001) can stabilize the active carbidic carbon species and quench the transformation process. These results reveal, to the best of our knowledge, for the first time the reactivity of various surface species on Co surfaces that dynamically maintain a delicate balance to enhance the long‐term stability of Co catalysts during FT synthesis. Abstract : Healing your own wounds : The active carbidic carbon species on Co surfaces for Fischer–Tropsch (FT) synthesis tends to transform into the inactive graphitic carbon species. Subsurface atomic oxygen on Co(0001) can quench the transformation process and enhance the long‐term stability of Co catalysts during FT synthesis.