کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9608088 | 46036 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Spatially resolved mass spectrometry as a fast semi-quantitative tool for testing heterogeneous catalyst libraries under reducing stagnant-point flow conditions
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Spatially resolved mass spectrometry as a fast semi-quantitative tool for testing heterogeneous catalyst libraries under reducing stagnant-point flow conditions Spatially resolved mass spectrometry as a fast semi-quantitative tool for testing heterogeneous catalyst libraries under reducing stagnant-point flow conditions](/preview/png/9608088.png)
چکیده انگلیسی
A calibrated quadrupole mass spectrometer (QMS) is combined with a home-made positioning unit deriving from scanning electrochemical microscopy (SECM) to sequentially address 25 catalysts, which are placed in wells. Highly reproducible catalytic data are obtained under stagnant-point flow conditions by means of coupled gas feed and QMS capillaries. The reaction array can be heated and is fully sealed from the atmosphere by a covering glass lid. Additionally, the reaction chamber is flushed with argon making it possible to study the structure-insensitive hydrogenation of ethene over SiO2-supported palladium catalysts unimpaired by oxygen poisoning. Since the derived semi-quantitative degree of conversion is proportional to the Pd metal area under fixed reaction conditions, spatially resolved mass spectrometry provides a novel method for rapidly estimating the metal surface areas of a Pd catalyst library.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis A: General - Volume 281, Issues 1â2, 18 March 2005, Pages 115-120
Journal: Applied Catalysis A: General - Volume 281, Issues 1â2, 18 March 2005, Pages 115-120
نویسندگان
Kathrin Eckhard, Oliver Schlüter, Volker Hagen, Barbara Wehner, Thomas Erichsen, Wolfgang Schuhmann, Martin Muhler,