Abstract
Gelidium-shaped NiCo2O4 nanomaterial is synthesized via a two-step process including hydrothermal synthesis and calcination. The NiCo2O4 nanomaterial has a unique hierarchical nanostructure which is constructed by a nanorod backbone and many tiny nanoneedles on the nanorod. The electrocatalytic performances of the NiCo2O4 nanomaterial for both methanol oxidation reaction (MOR) and oxygen reduction reaction (ORR) are tested. As for MOR, the NiCo2O4 nanomaterial delivers a high current density of 139 mA·mg−1 at 0.60 V (vs Ag/AgCl). As for ORR, the electrocatalytic activities of the NiCo2O4 nanomaterial are comparable to those of commercial Pt/C. The results reveal that the NiCo2O4 nanomaterial is a promising bifunctional electrocatalyst for DMFCs.
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