TY  - JOUR
AU  - Paciok, Paul
AU  - Schalenbach, Maximilian
AU  - Carmo, Marcelo
AU  - Lüke, Wiebke
AU  - Stolten, Detlef
TI  - On the mobility of carbon-supported platinum nanoparticles towards unveiling cathode degradation in water electrolysis
JO  - Journal of power sources
VL  - 365
SN  - 0378-7753
CY  - New York, NY [u.a.]
PB  - Elsevier
M1  - FZJ-2017-00110
SP  - 53 - 60
PY  - 2017
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000412379200008
DO  - DOI:10.1016/j.jpowsour.2017.07.033
UR  - https://juser.fz-juelich.de/record/825808
ER  -