کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9607856 | 46064 | 2005 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Understanding preparation variables in the synthesis of Au/Al2O3 using EXAFS and electron microscopy
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Understanding preparation variables in the synthesis of Au/Al2O3 using EXAFS and electron microscopy Understanding preparation variables in the synthesis of Au/Al2O3 using EXAFS and electron microscopy](/preview/png/9607856.png)
چکیده انگلیسی
The catalytic performance of Au/Al2O3 catalyst is highly sensitive to preparation procedure. EXAFS and TEM characterization of key steps in the preparation in conjunction with activity measurements result in deeper insights into precautions needed and the complex manner residual chloride impacts catalytic activity. Chloride affects the morphological (Au particle size), chemical (reducibility) as well as the catalytic (poisoning) properties of Au. Alternate preparation procedures to the conventional calcination of a catalyst prepared with deposition-precipitation at neutral pH were explored to increase Au loadings. It was found that low temperature H2 reduction of a catalyst prepared at low pH but washed with NaOH is an effective preparation method.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis A: General - Volume 291, Issues 1â2, 12 September 2005, Pages 73-84
Journal: Applied Catalysis A: General - Volume 291, Issues 1â2, 12 September 2005, Pages 73-84
نویسندگان
J.H. Yang, J.D. Henao, C. Costello, M.C. Kung, H.H. Kung, J.T. Miller, A.J. Kropf, J.-G. Kim, J.R. Regalbuto, M.T. Bore, H.N. Pham, A.K. Datye, J.D. Laeger, K. Kharas,