Understanding preparation variables in the synthesis of Au/Al 2O3 using EXAFS and electron microscopy

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

doi:10.1016/j.apcata.2004.11.052

Understanding preparation variables in the synthesis of Au/Al ₂O₃ using EXAFS and electron microscopy

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

Northwestern University

Research output: Contribution to journal › Article › peer-review

43 Citations (Scopus)

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	https://doi.org/10.1016/j.apcata.2004.11.052
Publication status	Published - Sep 12 2005

ASJC Scopus subject areas

Catalysis
Process Chemistry and Technology

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Yang, J. H., Henao, J. D., Costello, C., Kung, M. C., Kung, H. 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. (2005). Understanding preparation variables in the synthesis of Au/Al ₂O₃ using EXAFS and electron microscopy. Applied Catalysis A: General, 291(1-2), 73-84. https://doi.org/10.1016/j.apcata.2004.11.052

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, H. 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 › peer-review

Yang, JH, Henao, JD, Costello, C, Kung, MC, Kung, HH, Miller, JT, Kropf, AJ, Kim, JG, Regalbuto, JR, Bore, MT, Pham, HN, Datye, AK, Laeger, JD & Kharas, K 2005, 'Understanding preparation variables in the synthesis of Au/Al ₂O₃ using EXAFS and electron microscopy', Applied Catalysis A: General, vol. 291, no. 1-2, pp. 73-84. https://doi.org/10.1016/j.apcata.2004.11.052

Yang, J. H. ; Henao, J. D. ; Costello, C. ; Kung, M. C. ; Kung, H. 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. / Understanding preparation variables in the synthesis of Au/Al ₂O₃ using EXAFS and electron microscopy. In: Applied Catalysis A: General. 2005 ; Vol. 291, No. 1-2. pp. 73-84.

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title = "Understanding preparation variables in the synthesis of Au/Al 2O3 using EXAFS and electron microscopy",

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.",

author = "Yang, {J. H.} and Henao, {J. D.} and C. Costello and Kung, {M. C.} and Kung, {H. H.} and Miller, {J. T.} and Kropf, {A. J.} and Kim, {J. G.} and Regalbuto, {J. R.} and Bore, {M. T.} and Pham, {H. N.} and Datye, {A. K.} and Laeger, {J. D.} and K. Kharas",

note = "Funding Information: Use of the Advanced Photon Source was supported by the US Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. W-31-109-Eng-38. Work performed at MR-CAT is supported, in-part, by funding from the Department of Energy under grant number DE-FG02-04ER46106. The support of the National Science Foundation (CTS-9908181) is also gratefully acknowledged. Funding Information: Portions of this work were was performed at the DuPont-Northwestern-Dow Collaborative Access Team (DND-CAT) at Sector 5 of the Advanced Photon Source, which is supported by the E.I. DuPont de Nemours & Co., The Dow Chemical Company, the NSF through Grant DMR-9304725 and the State of Illinois through the Department of Commerce and the Board of Higher Education Grant IBHE HECA NWU 96. Use of the Advanced Photon Source was supported by the US Department of Energy, Basic Energy Sciences, Office of Energy Research under Contract No. W-31-102-Eng-38. Funding Information: Support of the work done at Northwestern University was provided by NSF-CTS-0121619. Support for the work done at UNM was provided by NSF grant CTS02-10835 and CTS 99-11174. ",

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AU - Kung, H. H.

AU - Miller, J. T.

AU - Kropf, A. J.

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AU - Regalbuto, J. R.

AU - Bore, M. T.

AU - Pham, H. N.

AU - Datye, A. K.

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AU - Kharas, K.

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