کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
52743 | 46885 | 2007 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Variable temperature FTIR study on the surface acidity of variously treated sulfated zirconias
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Variable temperature FTIR study on the surface acidity of variously treated sulfated zirconias Variable temperature FTIR study on the surface acidity of variously treated sulfated zirconias](/preview/png/52743.png)
چکیده انگلیسی
The acidity of three related sulfated zirconias has been compared by IR spectroscopy using CO and H2 as probe molecules. The parent material (SZ) was obtained by calcination of a commercial sulfated zirconium hydroxide. The other two samples, SZ-WW and SZ-SO3, were obtained from SZ by water washing and by sulfation with gaseous SO3, respectively. The labile sulfate groups responsible for alkane activation and associated with an IR band at 1406 cm−1 are removed by water washing and increased by SO3-sulfation. No remarkable differences in the strength of either Lewis or Brønsted acid sites have been observed between SZ and SZ-SO3. Water washing strongly weakens Brønsted acidity but only slightly weakens Lewis acidity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Communications - Volume 8, Issue 6, June 2007, Pages 865–870
Journal: Catalysis Communications - Volume 8, Issue 6, June 2007, Pages 865–870
نویسندگان
Olga V. Manoilova, Roberta Olindo, Carlos Otero Areán, Johannes A. Lercher,