A p-block dopant enables energy-efficient hydrogen production from biomass.

Herein, we develop innovative p-block Bi-doped Co 3 O 4 nanoflakes (Bi-Co 3 O 4 NFAs) on nickel foam, which exhibit excellent electrocatalytic activity for both glucose oxidation (GOR) and H 2 evolution reactions (HER). The two-electrode GOR-HER electrolyzer using Bi-Co 3 O 4 NFAs as both the cathode and anode shows a remarkable reduced operation voltage of 1.48 V at 10 mA cm -2 , superior to the 1.66 V of the OER-HER electrolyzer, demonstrating promising potential for advanced H 2 production featuring energy saving and simultaneously produced value-added chemicals.