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Variable Temperature Study of Au and Au-Pt Nanoparticles on Selected Oxide Supports

Published online by Cambridge University Press:  01 February 2011

D. Barrett ,
P. Franklyn  and
M. Scurrell
D. Barrett
Affiliation:
School of Chemistry, University of the Witwatersrand, Johannesburg, South Africa, P O Wits, South Africa, 2050. E-mail: michael.scurrell@wits.ac.za
P. Franklyn
Affiliation:
School of Chemistry, University of the Witwatersrand, Johannesburg, South Africa, P O Wits, South Africa, 2050. E-mail: michael.scurrell@wits.ac.za
M. Scurrell
Affiliation:
School of Chemistry, University of the Witwatersrand, Johannesburg, South Africa, P O Wits, South Africa, 2050. E-mail: michael.scurrell@wits.ac.za
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Abstract

We report on the size relationship of Au and Au-Pt nanoparticles that were synthesised on silica and anatase phase titania supports. Deposition-precipitation (DP) of metal chlorides with the addition of urea and ammonium hydroxide was used to produce the nanoparticles. The relative particle size relationship of the Au and Au-Pt nano particles (NP's) was investigated, relating the Pt concentration and the support polymorph over a temperature range. It was found, with the use of in-situ variable temperature powder X-ray diffraction (VT-PXRD) and transmission electron microscopy (TEM), that the addition of Pt to the Au system corresponded to a reduction in particle size over a broad temperature range.

Keywords

Au-Pt nanoparticlesDeposition-precipitationin situ XRDRietveld
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1279: New Catalytic Materials , 2010 , 40
Copyright
Copyright © Materials Research Society 2010

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References

(1) Haruta, M., Chem. Rec. 3 (2003) 75.Google Scholar
(2) Chen, M. S., Goodman, D. W., Science 306 (2004) 252.Google Scholar
(3) Falsig, H., Hvolbæk, B., Kristensen, I. S., Jiang, T., Bligaard, T., Christensen, C. H., NØrskov, J. K., Angew. Chem, Int Ed. 47 (2010) 4835 Google Scholar
(4) Liu, X., Wang, J., Zhang, T., Mou, C. H., Su, D. H., Li, J., Chem. Mater. 21 (2), (2009) 410–418 Google Scholar
(5) Haruta., M. Catal. Today 36 (1997) 153 Google Scholar
(6) Hermans, S, Devillers, M., Catal. Lett. 99 (2005) 55.Google Scholar
(7) Liu, X., Wang, A., Wang, X., Mou, C. H., Zhang, T., Chem. Commun. (2010) 3187 Google Scholar
(8) Mott, D., Luo, J., Smith, A., Njoki, P. N., Wang, L., Zhong, C-J., Nanoscale Res Lett 2 (2007) 12–16.Google Scholar
(9) Haruta, M., Catal. Surveys Jpn. 61. (1997).Google Scholar
(10) Haruta, M., The abilities and potential of gold as a catalyst, Report of the Osaka National Research Institute 393 (1999) 1–93.Google Scholar
(11) Zanella, R., Delannoy, L., Louise., C Appl Catal A, 291, (2005) 62–72.Google Scholar