Flocculent-structured high-entropy-alloy anode electrocatalyst for direct ethylene glycol fuel cells

The Pt-based alloys catalysts with special morphology attract great attention. Herein, a flocculent-structured high-entropy-alloy (HEA) (named as F-PtBiCuCoMo/C) electrocatalyst is prepared by co-reduction, which can greatly improve the overall catalytic performance and reduce Pt-usage. In ethylene glycol oxidation reaction (EGOR), it has mass activity of 1.08Amg-1Pt, which also has a good durability with high residual current density (0.27Amg-1Pt after 3000s). Notably, the power density reached 17.9mWcm-2 in as-assembled direct ethylene glycol fuel cells (DEGFC), which exceeded commercial Pt/C references by 2.4 times. Thence, this F-PtBiCuCoMo/C electrocatalyst would be a good option for the advancement of DEGFC technology.