Surface spectroscopic characterization of Cu/Al2O3 catalysts
1985; Elsevier BV; Volume: 94; Issue: 2 Linguagem: Inglês
10.1016/0021-9517(85)90216-7
ISSN1090-2694
Autores Tópico(s)nanoparticles nucleation surface interactions
ResumoThe surface properties of a series of impregnated CuAl2O3 catalysts were investigated by a variety of spectroscopic techniques: X-ray photoelectron spectroscopy (ESCA or XPS), low-energy ion scattering spectroscopy (ISS), photoacoustic spectroscopy (PAS), and X-ray diffraction. The surface characteristics of the catalysts are affected by both metal loading and calcination temperature. At low Cu loadings (<10%), copper ions form a well-dispersed interaction species with the support. At higher copper contents, segregation of bulk-line CuO occurs. Reduction by H2 and sulfidation with 15% H2SH2 (350 °C), lead to formation of metallic Cu and Cu2S, respectively.
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