ISSN:
1040-0397
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The oxidation of adsorbed SPO33- during the positive potential scan at a gold electrode is a major contributor to the total anodic signal that is catalyzed by formation of surface oxide. The number of electrons for oxidation of SPO33- in both the adsorbed (nads) and solution (nsoln) states was determined to be 6 equiv mol-1 on the basis of double-step chronocoulometry in a thin-layer cell. The products are concluded to be PO32- and SO43- on the basis of these n values, 31P NMR spectra, and a positive BaCl2 test for sulfate. The adsorption of SPO33- on Au is concluded to be consistent with the Langmuir isotherm to a coverage of θ = ca. 0.9, which is achieved for 0.6 mM Na3SPO3.
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/elan.1140010207
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