Design of a Highly Active Ir/Fe(OH)x Catalyst: Versatile Application of Pt-Group Metals for the Preferential Oxidation of Carbon Monoxide


  • Financial supports for this research work from the NSF of China (grant numbers 20803079, 21003119, 21076211, and 21103173). The electron microscopy work was conducted at the Oak Ridge National Laboratory′s High Temperature Materials Laboratory, sponsored by the U. S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Vehicle Technologies Program.


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With the right support: A Ir/Fe(OH)x catalyst was designed. The Fe(OH)x support stabilizes the metal catalyst used for the oxidation of carbon monoxide. The catalyst was highly active for the oxidation of carbon monoxide in the presence of excess hydrogen at room temperature and showed a wide temperature range for the total conversion of CO (see picture).