What are the economic and non-toxic oxidation methods of CO into CO2 at 80-200℃? e.g.using CeO. How to lower the oxidation temperature? Thank you very much!
Dear Hao,
The following publication discusses the use of catalysts to remove the residual CO in hydrogen feeds through selective oxidation for large-scale applications of hydrogen proton exchange membrane fuel cells. In this study a methodology that anchors high concentration oxygen vacancies at interface by designing a CeO2–x/Cu hybrid catalyst with enhanced preferential CO oxidation activity is discussed:
Anchoring High-Concentration Oxygen Vacancies at Interfaces of CeO2–x/Cu toward Enhanced Activity for Preferential CO Oxidation
Shaoqing Chen, Liping Li, Wanbiao Hu, Xinsong Huang, Qi Li, Yangsen Xu, Ying Zuo, and Guangshe Li*
Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, People’s Republic of China
ACS Appl. Mater. Interfaces, 2015, 7 (41), pp 22999–23007
DOI: 10.1021/acsami.5b06302
Publication Date (Web): October 07, 2015
Copyright © 2015 American Chemical Society
Catalysts are urgently needed to remove the residual CO in hydrogen feeds through selective oxidation for large-scale applications of hydrogen proton exchange membrane fuel cells. We herein propose a new methodology that anchors high concentration oxygen vacancies at interface by designing a CeO2–x/Cu hybrid catalyst with enhanced preferential CO oxidation activity. This hybrid catalyst, with more than 6.1% oxygen vacancies fixed at the favorable interfacial sites, displays nearly 100% CO conversion efficiency in H2-rich streams over a broad temperature window from 120 to 210 °C, strikingly 5-fold wider than that of conventional CeO2/Cu (i.e., CeO2 supported on Cu) catalyst. Moreover, the catalyst exhibits a highest cycling stability ever reported, showing no deterioration after five cycling tests, and a super long-time stability beyond 100 h in the simulated operation environment that involves CO2 and H2O. On the basis of an arsenal of characterization techniques, we clearly show that the anchored oxygen vacancies are generated as a consequence of electron donation from metal copper atoms to CeO2 acceptor and the subsequent reverse spillover of oxygen induced by electron transfer in well controlled nanoheterojunction. The anchored oxygen vacancies play a bridging role in electron capture or transfer and drive molecule oxygen into active oxygen species to interact with the CO molecules adsorbed at interfaces, thus leading to an excellent preferential CO oxidation performance. This study opens a window to design a vast number of high-performance metal-oxide hybrid catalysts via the concept of anchoring oxygen vacancies at interfaces.
http://pubs.acs.org/doi/abs/10.1021/acsami.5b06302?src=recsys&journalCode=aamick
Hoping this will be helpful,
Rafik
Dear Rafik,
Thank you sooooooooooo much for your help. actually we are considering how to achieve CO Oxidation in the burning process of cigarettes. Your answer is helpful to us, and we hope to have further communication with you and your research work.
With best regards!
Sincerely,
Hao