Shape and Crystal-Plane Effects of Nanoscale Ceria on the Activity of Au-CeO2 Catalysts for the Water–Gas Shift Reaction


  • Grant support from the DOE/BES-Hydrogen Fuel Initiative program (DE-FG02-05ER15730) and the NSF-NIRT program (grant 0304515) is gratefully acknowledged.


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A two-step synthesis method is used to prepare gold-on-ceria nanorods, nanocubes, and nanopolyhedra (see picture), and a strong shape-effect of CeO2 on the water–gas shift reaction activity of the catalysts is identified. Gold on the (110) facets of ceria nanorods shows the highest activity.