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

Ming Yang; Sha Li; Yuan Wang; Jeffrey A. Herron; Ye Xu; Lawrence F. Allard; Sungsik Lee; Jun Huang; Manos Mavrikakis; Maria Flytzani-Stephanopoulos

doi:10.1126/science.1260526

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

Ming Yang, Sha Li, Yuan Wang, Jeffrey A. Herron, Ye Xu, Lawrence F. Allard, Sungsik Lee, Jun Huang, Manos Mavrikakis, Maria Flytzani-Stephanopoulos

Nuclear Energy Materials Microanalysis

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Abstract

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

Original language	English
Pages (from-to)	1498-1501
Number of pages	4
Journal	Science
Volume	346
Issue number	6216
DOIs	https://doi.org/10.1126/science.1260526
State	Published - Dec 19 2014

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

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

author = "Ming Yang and Sha Li and Yuan Wang and Herron, \{Jeffrey A.\} and Ye Xu and Allard, \{Lawrence F.\} and Sungsik Lee and Jun Huang and Manos Mavrikakis and Maria Flytzani-Stephanopoulos",

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doi = "10.1126/science.1260526",

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T1 - Catalytically active Au-O(OH)x- species stabilized by alkali ions on zeolites and mesoporous oxides

AU - Yang, Ming

AU - Li, Sha

AU - Wang, Yuan

AU - Herron, Jeffrey A.

AU - Xu, Ye

AU - Allard, Lawrence F.

AU - Lee, Sungsik

AU - Huang, Jun

AU - Mavrikakis, Manos

AU - Flytzani-Stephanopoulos, Maria

PY - 2014/12/19

Y1 - 2014/12/19

N2 - We report that the addition of alkali ions (sodium or potassium) to gold on KLTL-zeolite and mesoporous MCM-41 silica stabilizes mononuclear gold in Au-O(OH)x-(Na or K) ensembles. This single-site gold species is active for the low-temperature (<200° C) water-gas shift (WGS) reaction. Unexpectedly, gold is thus similar to platinum in creating -O linkages with more than eight alkali ions and establishing an active site on various supports.The intrinsic activity of the single-site gold species is the same on irreducible supports as on reducible ceria, iron oxide, and titania supports, apparently all sharing a common, similarly structured gold active site.This finding paves the way for using earth-abundant supports to disperse and stabilize precious metal atoms with alkali additives for the WGS and potentially other fuel-processing reactions.

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

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EP - 1501

JO - Science

JF - Science

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ER -

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

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