CHARACTERIZATION OF BIMETALLIC Pt-Ru ON ALUMINA, SILICA AND MCM-41
Keywords:
Pt-Ru,, alumina, silica, MCM-41Abstract
Bimetallic Pt-Ru on alumina, silica and MCM-41 were prepared by impregnating each support with a solution mixture of H2PtCl6.6H2O and RuCl3.3H2O followed by drying and calcination at 400 C for 2 h. The metal loading in each material confirmed by X-ray fluorescence spectroscopy was not different from the pre-calculated values. Hydrogen adsorption was carried out to determine metal particle size. The adsorption capacity indicated that the dispersion of Pt was higher than Ru on all supports while those of the bimetallic materials were between the values of monometal. In addition, metal dispersion on Al2O3 was higher than on SiO2 and MCM-41. From the temperature-programmed reduction, Pt and Ru did not form bimetallic particles.
References
Antos, G.A., Aitani, A.M., and Parera, J.M., (1995). Catalytic Naphtha Reforming. Marcel
Dekker, NY, p. 96.
Ballinger, T.H., and Chen, H.-Y. (2001). The horizons of platinum metals catalysis. Platinum Metals Rev., 45(4):164-165.
Bergeret, G., and Gallezot, P., (1997). Handbook of Heterogeneous Catalysis, VCH Verlag GmbH, Weiheim, Germany, p. 439-446.
Chandler, B.D., and Pignolet, L.H. (2001). DRIFTS studies of carbon monoxide coverage on highly dispersed bimetallic Pt-Cu and Pt-Au catalysts. Catal. Today, 65:39-50.
Farrautao, R.J., and Bartholomew, C.H. (1997). Industrial Catalytic Processes. Blachie Academic & Professional, London, p. 88,145-147.
Hills, C.W., Nashner, M.S., Frenkel, A.I., Shapley, J.R., and Nuzzo, R.G. (1999). Carbon support effects on bimetallic Pt-Ru nanoparticles formed from molecular precursors. Langmuir, 15(3):690-700.
Ichikawa, M. (2000). "Ship-in-Bottle" catalyst technology. Platinum Metals Rev., 44(1): 3-14.
Kumar, D., Schumacher, K., du Fresne von Hohenesche, C., Grün, M., and Unger, K.K. (2001). MCM-41, MCM-48 and related mesoporous adsorbents: their synthesis and characterization. Colloids and Surfaces A: Physicochem. Eng. Aspects., 187-188: 109-116.
Martins, R.L., Baldanza, M.A.S., and Schmal, M. (2001). An infrared study of NO and CO adsorption on zeolite-supported Ru and Ru-Pt catalysts. J. Phys. Chem. B., 105(42): 10,303-10,307.
Nashner, M.S., Frenkel, A.I., Adler, D.L., Shapley, J.R., and Nuzzo, R.G. (1997). Structure characterization of carbon-supported platinum-ruthenium nanoparticles from molecular cluster precursor PtRu5C(CO)16 J. Am. Chem. Soc., 119(33):7, 760-7, 771.
Nashner, M.S., Frenkel, A.I., Somerville, D., Hills, C.W., Shapley, J.R., and Nuzzo, R.G. (1998). Core shell inversion during nucleation and growth of bimetallic Pt/Ru nanoparticles. J. Am. Chem. Soc., 120(32):8,093-8,101.
Niemantsverdriet, J.W. (2000). Spectroscopy in Catalysis. 2nd ed. Wiley-VCH Verlag GmbH, Weiheim, Germany, p. 11-19.
Rajesh, B., Thampi, K.R., Bonard, J.-M., and Viswanathan, B. (2000). Preparation of a Pt-Ru bimetallic system supported on carbon nanotubes. J. Mater. Chem., 10:1,757-1,759.
Suriyakrai, W., Wittayakun, J., and Grisdanurak, N. (2002). Adsorption Behavior of Chlorinated Volatile Organic Compounds in an Aqueous Solution by Mesoporous Molecular Sieves. Proceeding of the 3rd National Symposium on Graduate Research; Jul 18-19, 2002; Nakhon Ratchasima, Suranaree University of Technology, Thailand, p. 335-336.
