%0 Journal Article
%A Paciok, Paul
%A Schalenbach, Maximilian
%A Carmo, Marcelo
%A Lüke, Wiebke
%A Stolten, Detlef
%T On the mobility of carbon-supported platinum nanoparticles towards unveiling cathode degradation in water electrolysis
%J Journal of power sources
%V 365
%@ 0378-7753
%C New York, NY [u.a.]
%I Elsevier
%M FZJ-2017-00110
%P 53 - 60
%D 2017
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000412379200008
%R 10.1016/j.jpowsour.2017.07.033
%U https://juser.fz-juelich.de/record/825808