Journal Article

FZJ-2017-00110

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png On the mobility of carbon-supported platinum nanoparticles towards unveiling cathode degradation in water electrolysis

Paciok, P.FZJ* ; Schalenbach, M. ; Carmo, M. (Corresponding author)FZJ* ; Lüke, W. ; Stolten, D.FZJ*

2017
Elsevier New York, NY [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.jpowsour.2017.07.033

Abstract: This study investigates the influence of the hydrogen evolution reaction (HER) overpotential on the mobility of carbon-supported platinum particles. The migration of the platinum over the carbon support was analyzed by means of identical location transmission electron microscopy (IL-TEM). While at potentials of 0.1 and 0 V vs. reversible hydrogen electrode (RHE), no changes to the Pt/C material were observed. With a decrease of the overpotential to −0.1 V vs. RHE, an increase in the quantity of migrating platinum particles took place. At −0.2 V vs. RHE, a further rise in the particle migration was observed. The effect of the overpotential on the migration was explained by a higher hydrogen generation rate, the formation of a hydrogen monolayer on the platinum and the resulting changes of the platinum support distance. The mechanisms revealed in this study could describe a relevant source of degradation of PEM water electrolyzers.

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Contributing Institute(s):

1. Elektrochemische Verfahrenstechnik (IEK-3)

Research Program(s):

1. 134 - Electrolysis and Hydrogen (POF3-134) (POF3-134)

Appears in the scientific report 2017

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Database coverage:
; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF >= 5 ; JCR ; NCBI Molecular Biology Database ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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