Influence of copper modifying additive on state of gold in zeolites

Abstract

The influence of copper modifying additive on state of gold in NaY and NH₄-mordenite has been investigated. The presence of copper in Au/Cu/NM permits to stabilize fine gold particles (∼8 nm), while for Au/Cu/NaY large particles with unusual complex structure and size up to 80 nm were registered. Furthermore, copper favors the formation of gold particles at low temperature. It was revealed the interaction of gold with copper to facilitate the activation of sites at low temperature due to change of redox and electronic properties of gold species. Gold clusters or gold species with strong chemical interaction with copper ions are active in CO oxidation at low temperature being sensitive to sample pretreatment. Gold nanoparticles are active at high temperature and are less sensitive to reaction conditions.

Original language	English
Pages (from-to)	4256-4259
Number of pages	4
Journal	Surface Science
Volume	600
Issue number	18
DOIs	https://doi.org/10.1016/j.susc.2006.01.153
Publication status	Published - 15 Sep 2006

Keywords

Additive
Catalysts
Clusters
Copper
Gold
Zeolite

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Condensed Matter Physics
Surfaces and Interfaces

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10.1016/j.susc.2006.01.153

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@article{c06c601bbeb542d8a5f6282335dc1aa4,

title = "Influence of copper modifying additive on state of gold in zeolites",

abstract = "The influence of copper modifying additive on state of gold in NaY and NH4-mordenite has been investigated. The presence of copper in Au/Cu/NM permits to stabilize fine gold particles (∼8 nm), while for Au/Cu/NaY large particles with unusual complex structure and size up to 80 nm were registered. Furthermore, copper favors the formation of gold particles at low temperature. It was revealed the interaction of gold with copper to facilitate the activation of sites at low temperature due to change of redox and electronic properties of gold species. Gold clusters or gold species with strong chemical interaction with copper ions are active in CO oxidation at low temperature being sensitive to sample pretreatment. Gold nanoparticles are active at high temperature and are less sensitive to reaction conditions.",

keywords = "Additive, Catalysts, Clusters, Copper, Gold, Zeolite",

author = "E. Smolentseva and N. Bogdanchikova and A. Simakov and A. Pestryakov and I. Tusovskaya and M. Avalos and Far{\'i}as, {M. H.} and D{\'i}az, {J. A.} and V. Gurin",

year = "2006",

month = sep,

day = "15",

doi = "10.1016/j.susc.2006.01.153",

language = "English",

volume = "600",

pages = "4256--4259",

journal = "Surface Science",

issn = "0039-6028",

publisher = "Elsevier",

number = "18",

}

TY - JOUR

T1 - Influence of copper modifying additive on state of gold in zeolites

AU - Smolentseva, E.

AU - Bogdanchikova, N.

AU - Simakov, A.

AU - Pestryakov, A.

AU - Tusovskaya, I.

AU - Avalos, M.

AU - Farías, M. H.

AU - Díaz, J. A.

AU - Gurin, V.

PY - 2006/9/15

Y1 - 2006/9/15

N2 - The influence of copper modifying additive on state of gold in NaY and NH4-mordenite has been investigated. The presence of copper in Au/Cu/NM permits to stabilize fine gold particles (∼8 nm), while for Au/Cu/NaY large particles with unusual complex structure and size up to 80 nm were registered. Furthermore, copper favors the formation of gold particles at low temperature. It was revealed the interaction of gold with copper to facilitate the activation of sites at low temperature due to change of redox and electronic properties of gold species. Gold clusters or gold species with strong chemical interaction with copper ions are active in CO oxidation at low temperature being sensitive to sample pretreatment. Gold nanoparticles are active at high temperature and are less sensitive to reaction conditions.

AB - The influence of copper modifying additive on state of gold in NaY and NH4-mordenite has been investigated. The presence of copper in Au/Cu/NM permits to stabilize fine gold particles (∼8 nm), while for Au/Cu/NaY large particles with unusual complex structure and size up to 80 nm were registered. Furthermore, copper favors the formation of gold particles at low temperature. It was revealed the interaction of gold with copper to facilitate the activation of sites at low temperature due to change of redox and electronic properties of gold species. Gold clusters or gold species with strong chemical interaction with copper ions are active in CO oxidation at low temperature being sensitive to sample pretreatment. Gold nanoparticles are active at high temperature and are less sensitive to reaction conditions.

KW - Additive

KW - Catalysts

KW - Clusters

KW - Copper

KW - Gold

KW - Zeolite

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U2 - 10.1016/j.susc.2006.01.153

DO - 10.1016/j.susc.2006.01.153

M3 - Article

AN - SCOPUS:33748931142

VL - 600

SP - 4256

EP - 4259

JO - Surface Science

JF - Surface Science

SN - 0039-6028

IS - 18

ER -