Accession Number : ADA266717


Title :   Phosphine Chemistry on Mo(110) and Oxidized Mo(110)


Corporate Author : PITTSBURGH UNIV PA SURFACE SCIENCE CENTER


Personal Author(s) : Zhang, X ; Linsebigler, A ; Heiz, U ; Yates, J T , Jr


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a266717.pdf


Report Date : Jan 1993


Pagination or Media Count : 8


Abstract : The adsorption and desorption of phosphine and the oxidation of phosphorus on Mo(110) and oxidized Mo(110) have been studied by using Auger electron spectroscopy (AES), temperature-programmed desorption (TPD), and low- energy electron diffraction (LEED). Both molecular desorption and dissociative processes were observed on Mo(110), leaving adsorbed P(a) species in a c(4x1) overlayer structure. The P(a) species do not undergo diffusion into the bulk below 1000 K. On the oxidized Mo(110) surface, the phosphine adsorption and dissociation process was inhibited significantly. Phosphorus on the Mo(110) surface could be oxidized to produce PO(g) and PO2(g) species near 900 K, as detected by line-of-sight mass spectroscopy; neither P2O3(g) nor P2O5(g) was observed


Descriptors :   *MOLYBDENUM , *OXIDATION , *PHOSPHINE , REPRINTS , DESORPTION , AUGER ELECTRON SPECTROSCOPY , PHOSPHORUS , CATALYSIS , ADSORPTION


Subject Categories : Physical Chemistry


Distribution Statement : APPROVED FOR PUBLIC RELEASE