Abstract
Tungsten carbide (WC) is widely studied as a non-noble metal catalyst due to its surface electron structure similar to Pt. However, the synergistic effect between Pt and WC is still a controversial issue for methanol electro-oxidation reaction (MOR). Herein, we demonstrate that hydrogen overflow effect and bi-functional mechanism are responsible for the outstanding electrochemical properties of Pt-WC/C catalyst. Moreover, benefiting from the unique double layer structure of ionic liquids (ILs), the Pt-WC/C catalyst exhibits the excellent cycling life towards MOR. This study may offer new insights for the development of WC and ionic liquids in the field of fuel cells.
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