The performance of durability in direct methanol fuel cell (DMFC) is of great significance. In this study, NiCo 2 O 4 with three-dimensional ordered hierarchical pore was applied as oxygen reduction reaction electrocatalyst to enhance the longterm stability in passive DMFC. The peak power densities of NiCo 2 O 4 -based DMFC were 14.78 and 26 mW cm À 2 at 15 and 40°C, respectively. In the durability test, NiCo 2 O 4 -based DMFC could operate continually for 1406 hours, which is approx-imately 6 times higher than the highest values reported in literature. And the outstanding durability could be mainly ascribed to the interconnected and ordered macropores channel in NiCo 2 O 4 , which could act as a structural buffer to mitigate the structural changes in porous nano-catalysts, and also significantly facilitate the mass transport and the rapid elimination of cathodic product to solve the problem of "water flooding" at the cathode.
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