Study of the State of Supported Silver Catalysts by Electronic Diffuse Reflectance Spectroscopy. II. State of Silver in Supported Silver Catalysts on Various Types of Silicon Dioxide Full article
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Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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Output data | Year: 1989, Volume: 29, Number: 4 pt 2, Pages: 784-792 Pages count : 9 | ||||
Tags | Granular Materials - Surface Measurement; Particle Size Analysis - Microscopic Examination; Silica - Surface Properties; Silver and Alloys - Spectroscopic Analysis; Spectroscopy, Electron | ||||
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Abstract:
The state of Ag in catalysts on various types of SiO2 has been studied with the aid of electronic diffuse reflectance spectroscopy. It has been shown that the character of the diffuse reflectance spectra depends on the distribution of Ag particles according to size, which is specified by the preparation method, the Ag content, and the specific surface of the support. For samples in which the contribution of the Ag particles measuring 1-7 nm is high, structureless absorption is observed; when particles with dimensions ranging from a few to several tens of nanometer predominate, bands of the plasma resonance absorption of the Ag crystallites are observed in the 350-410 nm range; in the case of samples containing coarsely divided silver with particles measuring more than 100 nm on their surfaces, an absorption band caused by the internal photoeffect of such particles is observed at 310-315 nm. It was also discovered that roasting in air at 773 °K results in the stabilization of such clusters on all the samples, regardless of the type of SiO2 and the distribution of the Ag particles according to size.
Cite:
Bogdanchikova N.E.
, Anufrienko V.F.
, Davydov A.A.
, Finn L.P.
, Zaikovskii V.I.
, Kolomiichuk V.N.
, Moroz E.M.
, Boldy'reva N.N.
Study of the State of Supported Silver Catalysts by Electronic Diffuse Reflectance Spectroscopy. II. State of Silver in Supported Silver Catalysts on Various Types of Silicon Dioxide
Kinetics and Catalysis. 1989. V.29. N4 pt 2. P.784-792. WOS Scopus РИНЦ
Study of the State of Supported Silver Catalysts by Electronic Diffuse Reflectance Spectroscopy. II. State of Silver in Supported Silver Catalysts on Various Types of Silicon Dioxide
Kinetics and Catalysis. 1989. V.29. N4 pt 2. P.784-792. WOS Scopus РИНЦ
Original:
Богданчикова Н.Е.
, Ануфриенко В.Ф.
, Давыдов А.А.
, Финн Л.П.
, Зайковский В.И.
, Коломийчук В.Н.
, Мороз Э.М.
, Болдырева Н.Н.
Изучение состояния нанесенных серебряных катализаторов методом электронной спектроскопии диффузного отражения (ЭСДО). II. Состояние серебра в нанесенных на различные типы диоксида кремния серебряных катализаторах
Кинетика и катализ. 1988. Т.29. №4. С.914-922. РИНЦ
Изучение состояния нанесенных серебряных катализаторов методом электронной спектроскопии диффузного отражения (ЭСДО). II. Состояние серебра в нанесенных на различные типы диоксида кремния серебряных катализаторах
Кинетика и катализ. 1988. Т.29. №4. С.914-922. РИНЦ
Dates:
Submitted: | May 4, 1987 |
Published print: | Feb 1, 1989 |
Identifiers:
Web of science | WOS:A1988U344200004 |
Scopus | 2-s2.0-0024613654 |
Elibrary | 31148861 |
Citing:
DB | Citing |
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Web of science | 1 |