Fig. 5: Durability performance of MoOxCy and the underlying mechanism.

a Chronoamperometric tests of HCP-MoOC, commercial Pt/C, and MoO2 catalysts. b Polarization curves of HCP-MoOC before and after 10,000 CV cycles. The resistivity of the catalyst (2.50 ± 0.02 Ω) remained stable throughout the cycling. Calculated Mo-O binding energy and bond length of c MoO2 and d HCP-MoOC.