Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 73-84 |
| Number of pages | 12 |
| Journal | Applied Catalysis A: General |
| Volume | 291 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - Sep 12 2005 |
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ASJC Scopus subject areas
- Catalysis
- Process Chemistry and Technology
Cite this
Understanding preparation variables in the synthesis of Au/Al 2O3 using EXAFS and electron microscopy. / Yang, J. H.; Henao, J. D.; Costello, C.; Kung, M. C.; Kung, Harold H; Miller, J. T.; Kropf, A. J.; Kim, J. G.; Regalbuto, J. R.; Bore, M. T.; Pham, H. N.; Datye, A. K.; Laeger, J. D.; Kharas, K.
In: Applied Catalysis A: General, Vol. 291, No. 1-2, 12.09.2005, p. 73-84.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Understanding preparation variables in the synthesis of Au/Al 2O3 using EXAFS and electron microscopy
AU - Yang, J. H.
AU - Henao, J. D.
AU - Costello, C.
AU - Kung, M. C.
AU - Kung, Harold H
AU - Miller, J. T.
AU - Kropf, A. J.
AU - Kim, J. G.
AU - Regalbuto, J. R.
AU - Bore, M. T.
AU - Pham, H. N.
AU - Datye, A. K.
AU - Laeger, J. D.
AU - Kharas, K.
PY - 2005/9/12
Y1 - 2005/9/12
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=23844473787&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=23844473787&partnerID=8YFLogxK
U2 - 10.1016/j.apcata.2004.11.052
DO - 10.1016/j.apcata.2004.11.052
M3 - Article
AN - SCOPUS:23844473787
VL - 291
SP - 73
EP - 84
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
SN - 0926-860X
IS - 1-2
ER -