Platinum Dissolution and Redeposition from Pt/C Fuel Cell Electrocatalyst at Potential Cycling. Issue 6 (1st January 2018)

• Record Type: Journal Article
• Authors: Pavlišič, Andraž; Jovanovič, Primož; Šelih, Vid Simon; Šala, Martin; Hodnik, Nejc; Gaberšček, Miran
• Is Part Of: Journal of the Electrochemical Society. Volume 165:Issue 6(2018)
• Page Start: F3161
• Page End: F3165
• Publication Date: 2018-01-01
• Subjects: electrocatalysis -- fuel cell -- stability; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0191806jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : Extremely sensitive on-line detection of metal ions concentration was used to investigate potential-resolved platinum dissolution from commercial fuel cell electrocatalyst. The experiments were carried out in an electrochemical flow cell connected to inductively coupled plasma mass spectrometer. A variety of electrochemical treatments using different voltage scan rates confirmed the previously observed primary platinum degradation mechanism - the so-called "transient dissolution". Importantly, the redeposition of dissolved platinum is now shown to play an important role in the overall effective Pt dissolution. Pt redeposition trends exhibit a significant dependence on voltage scan rate.