Catalytically active Au-O(OH) x - species stabilized by alkali ions on zeolites and mesoporous oxides

• DOI: 10.1126/science.1260526
• Publication Date: 2014-11-28T15:55:25Z
• Authors: Ming Yang; Sha Li; Yuan Wang; Jeffrey A. Herron; Ye Xu; Lawrence F. Allard; Sungsik Lee; Jun Huang; Manos Mavrikakis; Maria Flytzani-St...
• Keywords: 01 natural sciences; 0104 chemical sciences

We report that the addition of alkali ions (sodium or potassium) to gold on KLTL-zeolite and mesoporous MCM-41 silica stabilizes mononuclear in Au-O(OH)x-(Na K) ensembles. This single-site species is active for low-temperature (<200°C) water-gas shift (WGS) reaction. Unexpectedly, thus similar platinum creating -O linkages with more than eight establishing an site various supports. The intrinsic activity same irreducible supports as reducible ceria, iron oxide, titania supports, apparently all sharing a common, similarly structured site. finding paves way using earth-abundant disperse stabilize precious metal atoms additives WGS potentially other fuel-processing reactions.