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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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Dissolution of Platinum Single Crystals in Acidic Medium.

Sandbeck Daniel J S DJS   Brummel Olaf O   Mayrhofer Karl J J KJJ   Libuda Jörg J   Katsounaros Ioannis I   Cherevko Serhiy S  

Chemphyschem : a European journal of chemical physics and physical chemistry 20191108 22


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 HClO<sub>4</sub> . 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  ...[more]

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