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Dissolution of Platinum Single Crystals in Acidic Medium.


ABSTRACT: Platinum single crystal basal planes consisting of Pt(111), Pt(100), Pt(110) and reference polycrystalline platinum Pt(poly) were subjected to various potentiodynamic and potentiostatic electrochemical treatments in 0.1?M HClO4 . Using the scanning flow cell coupled to an inductively coupled plasma mass spectrometer (SFC-ICP-MS) the transient dissolution was detected on-line. Clear trends in dissolution onset potentials and quantities emerged which can be related to the differences in the crystal plane surface structure energies and coordination. Pt(111) is observed to have a higher dissolution onset potential while the generalized trend in dissolution rates and quantities was found to be Pt(110)>P(100)?Pt(poly)>Pt(111).

SUBMITTER: Sandbeck DJS 

PROVIDER: S-EPMC6899853 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature

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