The crossover effect is in the case of direct methanol fuel cell (DMFC) much more significant in comparison with PEMFC. Proof that the methanol crossover is a big issue in this field is a fact that there exist lots of publications describing the innovative procedures how to diminish this phenomenon [1-4].

In this work we present the investigation of influence of methanol crossover on the cathode catalyst. The durability of cathode catalyst exposed by methanol is studied. Moreover, the regenerative behavior after exposition has been found.

The comparison of commercial catalyst with our own sputtered Pt, Pt-Co and Pt-Ru thin film as a catalyst is presented. Additionally, the technic enabling measurement of the crossover in DMFC using micro-reactor and mass-spectrometry is introduced.

[1] ARICÒ, Antonino S., et al., Membranes, 2015, 5.4: 793-809.

[2] SUDAROLI, B. Mullai; KOLAR, Ajit Kumar.. Energy, 2016, 98: 204-214.

[3] MEENAKSHI, S., et al. Electrochimica Acta, 2013, 89: 35-44.

[4] WAN, Nianfang, et al.. Journal of power sources, 2007, 163.2: 725-730.