Microcalorimetric Study of CO2and NH3Adsorption on Rb- and Sr-Modified Catalyst Supports

Autor:	Shailendra V. Bordawekar, Eric J. Doskocil, Robert J. Davis
Rok vydání:	1998
Předmět:	Isothermal microcalorimetry Strontium Catalyst support Inorganic chemistry chemistry.chemical_element Surfaces and Interfaces Condensed Matter Physics Heterogeneous catalysis Catalysis Rubidium Adsorption chemistry Electrochemistry General Materials Science Carbon Spectroscopy
Zdroj:	Langmuir. 14:1734-1738
ISSN:	1520-5827 0743-7463
DOI:	10.1021/la9709960
Popis:	Acid−base characteristics of a series of rubidium- and strontium-modified materials were studied using adsorption microcalorimetry of ammonia and carbon dioxide. The samples were prepared by impregnation and decomposition of acetate precursors at 773 K on γ-alumina, titania, carbon, and silica. Microcalorimetric measurements showed that the incorporation of rubidium and strontium neutralized acid sites and created new base sites on the supports. However, the extent of these modifications depended on the compositions of both the basic additive and the support. Rubidium was more effective than strontium at altering the acid/base character of all the supports studied. The fewest base sites were found on modified silica, presumably due to the formation of surface silicate phases.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4d1892bdcdb6cfd401f4f16be836cce1 https://doi.org/10.1021/la9709960 Zobrazit plný text záznamu