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- W4236059059 abstract "Temperature programmed desorption (TPD) was used to compare nitric oxide dissociation on Pt(100), Pt(411) and Pt(211). These three faces were chosen for study because they possess sites with nearly the same orbital symmetries. However, the site densities are different on the three faces. It was found that all three faces show nearly identical reactivity for NO dissociation. Measured dissociation fractions were 66, 70 and 66% on the Pt(100), Pt(411) and Pt(211) surfaces respectively. NO dissociation on Pt(100) was inhibited by a (1 × 1) → (1 × 5) reconstruction, which creates a less active surface during the desorption process. However, the activation energy for N2 formation was nearly identical (28 kcalmol) on Pt(211) and Pt(411). Of course many of the features of the TPD spectra varied from face to face. Pt(100) displays a complicated TPD spectrum, due to the presence of surface reconstructions during desorption process. The binding energy of NO on the (100) steps on Pt(211) was found to be unusually strong. However, examination of the data indicates that, except for some minor effects, the variations in reactivity with changing crystal face were as expected from an examination of the symmetries of the orbitals available for reaction, and do not scale with the site density." @default.
- W4236059059 created "2022-05-12" @default.
- W4236059059 creator A5008673985 @default.
- W4236059059 creator A5024055494 @default.
- W4236059059 date "1989-02-01" @default.
- W4236059059 modified "2023-09-23" @default.
- W4236059059 title "A TPD study of nitric oxide decomposition on Pt(100), Pt(411) and Pt(211)" @default.
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- W4236059059 doi "https://doi.org/10.1016/0039-6028(89)90057-5" @default.
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