PtCoCr/C electrocatalysts for fuel cells with proton-conducting polymer electrolyte

There were works to develop the advanced catalyst systems (PtCoCr/C) with a core-shell structure, where the core – a metal alloy, and the shell is rich in platinum. The works were made in Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences. Reduction of surface coverage of Pt in the shell by firmly chemisorbed oxygen is a novel feature of the catalyst providing corrosion resistance, activity, selectivity with O2 recovery to water. Architecture of cathode OIE was developed using PtCoCr/C, its tests were conducted (resource and accelerated stress testing) in TE with proton-conducting polymer electrolyte. It has been shown that achieved characteristics are not inferior to those characteristics on Pt/C catalyst, using PtCoCr/C (30 wt.% Pt) and
Pt reduction at the cathode twice. Furthermore, in the test conditions, the efficiency of use Pt in PtCoCr/C system was considerably higher than in Pt/C. These results open the possibility of transition to the next phase – the organization of production of modern low-temperature fuel cells with characteristics corresponding to the world standards, using local materials.

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