Tetrameric silver clusters in rho zeolite stable above room temperature - ESR studies

Jacek Michalik; Jarosław Sadło; Jong Sung Yu; Larry Kevan

doi:10.1016/0927-7757(96)03598-4

Tetrameric silver clusters in rho zeolite stable above room temperature - ESR studies

Jacek Michalik, Jarosław Sadło, Jong Sung Yu, Larry Kevan

Department of Energy and Science and Engineering

Research output: Contribution to journal › Conference article › peer-review

17 Scopus citations

Abstract

Cationic silver clusters formed in γ-irradiated Ag⁺ -exchanged zeolite rho have been studied by electron spin resonance (ESR) spectroscopy. It was found that dehydrated Ag-rho zeolites show a remarkable tendency for stabilization of Ag₄³⁺ clusters. In dehydrated samples tetrameric silver is stable for months at room temperature and is still observed at 100°C. It is postulated that Ag₄³⁺ clusters are located in distorted octagonal prisms which appear to be very effective trapping sites. In hydrated rho zeolite framework distortions are removed and silver tetramers decay below room temperature.

Original language	English
Pages (from-to)	239-247
Number of pages	9
Journal	Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volume	115
DOIs	https://doi.org/10.1016/0927-7757(96)03598-4
State	Published - 30 Aug 1996
Event	Proceedings of the 1996 7th International Symposium on Magnetic Resonanace in Colloid and Interface Science - Madrid, Spain Duration: 11 Sep 1996 → 15 Sep 1996

Bibliographical note

Funding Information:
This researchw as supportedb y the US-Poland Maria Sktodowska-Curie Joint Foundation It (grant No. PAA/NSF-92-91), the Robert A. Welch Foundation, the Institute of Nuclear Chemistry and TechnologyF undamentalR esearchProgram, the US National Science Foundation and the Korean Science and Engineering Foundation (KOSEF).

Keywords

molecular adsorbates
radiolysis
silver clusters
zeolite rho

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10.1016/0927-7757(96)03598-4

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title = "Tetrameric silver clusters in rho zeolite stable above room temperature - ESR studies",

abstract = "Cationic silver clusters formed in γ-irradiated Ag+ -exchanged zeolite rho have been studied by electron spin resonance (ESR) spectroscopy. It was found that dehydrated Ag-rho zeolites show a remarkable tendency for stabilization of Ag43+ clusters. In dehydrated samples tetrameric silver is stable for months at room temperature and is still observed at 100°C. It is postulated that Ag43+ clusters are located in distorted octagonal prisms which appear to be very effective trapping sites. In hydrated rho zeolite framework distortions are removed and silver tetramers decay below room temperature.",

keywords = "molecular adsorbates, radiolysis, silver clusters, zeolite rho",

author = "Jacek Michalik and Jaros{\l}aw Sad{\l}o and Yu, \{Jong Sung\} and Larry Kevan",

note = "Funding Information: This researchw as supportedb y the US-Poland Maria Sktodowska-Curie Joint Foundation It (grant No. PAA/NSF-92-91), the Robert A. Welch Foundation, the Institute of Nuclear Chemistry and TechnologyF undamentalR esearchProgram, the US National Science Foundation and the Korean Science and Engineering Foundation (KOSEF).; Proceedings of the 1996 7th International Symposium on Magnetic Resonanace in Colloid and Interface Science ; Conference date: 11-09-1996 Through 15-09-1996",

year = "1996",

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doi = "10.1016/0927-7757(96)03598-4",

language = "English",

volume = "115",

pages = "239--247",

journal = "Colloids and Surfaces A: Physicochemical and Engineering Aspects",

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TY - JOUR

T1 - Tetrameric silver clusters in rho zeolite stable above room temperature - ESR studies

AU - Michalik, Jacek

AU - Sadło, Jarosław

AU - Yu, Jong Sung

AU - Kevan, Larry

N1 - Funding Information: This researchw as supportedb y the US-Poland Maria Sktodowska-Curie Joint Foundation It (grant No. PAA/NSF-92-91), the Robert A. Welch Foundation, the Institute of Nuclear Chemistry and TechnologyF undamentalR esearchProgram, the US National Science Foundation and the Korean Science and Engineering Foundation (KOSEF).

PY - 1996/8/30

Y1 - 1996/8/30

N2 - Cationic silver clusters formed in γ-irradiated Ag+ -exchanged zeolite rho have been studied by electron spin resonance (ESR) spectroscopy. It was found that dehydrated Ag-rho zeolites show a remarkable tendency for stabilization of Ag43+ clusters. In dehydrated samples tetrameric silver is stable for months at room temperature and is still observed at 100°C. It is postulated that Ag43+ clusters are located in distorted octagonal prisms which appear to be very effective trapping sites. In hydrated rho zeolite framework distortions are removed and silver tetramers decay below room temperature.

AB - Cationic silver clusters formed in γ-irradiated Ag+ -exchanged zeolite rho have been studied by electron spin resonance (ESR) spectroscopy. It was found that dehydrated Ag-rho zeolites show a remarkable tendency for stabilization of Ag43+ clusters. In dehydrated samples tetrameric silver is stable for months at room temperature and is still observed at 100°C. It is postulated that Ag43+ clusters are located in distorted octagonal prisms which appear to be very effective trapping sites. In hydrated rho zeolite framework distortions are removed and silver tetramers decay below room temperature.

KW - molecular adsorbates

KW - radiolysis

KW - silver clusters

KW - zeolite rho

UR - https://www.scopus.com/pages/publications/0342502053

U2 - 10.1016/0927-7757(96)03598-4

DO - 10.1016/0927-7757(96)03598-4

M3 - Conference article

AN - SCOPUS:0342502053

SN - 0927-7757

VL - 115

SP - 239

EP - 247

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

T2 - Proceedings of the 1996 7th International Symposium on Magnetic Resonanace in Colloid and Interface Science

Y2 - 11 September 1996 through 15 September 1996

ER -

Tetrameric silver clusters in rho zeolite stable above room temperature - ESR studies

Abstract

Bibliographical note

Keywords

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