Av. Bulatov et al., DISTRIBUTION OF IRIDIUM BY THE DEPTH OF IRIDIUM-CONTAINING PARTICLES OF IR-GAMMA-AL2O3 CATALYST, Kinetics and catalysis, 34(1), 1993, pp. 171-173
Measurement of the integral intensities of the x-ray photoelectron lin
es Ir4f, Ir4d5/2, and Ir4p3/2 showed that an iridium concentration gra
dient is characteristic of iridium-containing particles of Ir/gamma-Al
2O3 catalyst: the concentration of iridium is lower in the upper layer
s than in deep layers.