Kinetics of hydrogen adsorption and Desorption on silica-supported Pt, Rh, and Ru catalysts studied by solid state H-1 NMR

Date

2002-05-14

Author

Savargaonkar, N
Üner, Deniz
Pruski, M
King, TS

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The kinetics of adsorption and desorption of hydrogen on the multifaceted surfaces of silica-supported Pt, Rh, and Ru catalysts were studied by means of solid state H-1 NMR. Experiments with selective inversion of 1H magnetization and the formalism developed by Engelke et al. [J. Chem. Phys. 1994, 101 (9), 7262] were used to extract the adsorption and desorption rate constants and the apparent sticking coefficient. The sticking coefficients of hydrogen measured at 333 K at a surface coverage of 0.4 over 5% Pt/SiO2, 4% Ru/SiO2, and 3% Rh/SiO2 were determined to be 0.014, 0.12, and 0.52, respectively. The corresponding activation energies for desorption were 66, 43, and 79 kJ/mol, respectively.

Subject Keywords

Fischer-tropsch synthesis, Alkali promoters, Ru/sıo2 surfaces, Carbon-monoxide, Metal-catalysts, Ruthenıum, Chemisorption, Nı(111), Rh(111), Model

URI

https://hdl.handle.net/11511/36809

Journal

LANGMUIR

DOI

https://doi.org/10.1021/la0157263

Collections

Department of Chemical Engineering, Article

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Citation Formats

N. Savargaonkar, D. Üner, M. Pruski, and T. King, “Kinetics of hydrogen adsorption and Desorption on silica-supported Pt, Rh, and Ru catalysts studied by solid state H-1 NMR,” LANGMUIR, pp. 4005–4009, 2002, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/36809.