Energy-efficient bifunctional CoB x /GDY catalyst for urea-assisted hydrogen production via electrochemical urea oxidation and hydrogen evolution

W4415655308 · 수집 2026-10-04 18:16:49

T10030 Electrocatalysts for Energy Conversion

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Efficient and durable bifunctional electrocatalysts for the urea oxidation reaction (UOR) and hydrogen evolution reaction (HER) are vital for sustainable hydrogen production coupled with wastewater remediation. Herein, we present a CoB x /GDY catalyst electrode that delivers outstanding activity and stability for both reactions. CoB x /GDY requires only 1.41 V vs. RHE to achieve 50 mA cm-2 for UOR, while for HER it exhibits an overpotential of 118 mV at 10 mA cm-2 with a Tafel slope of 97.2 mV dec-1. The superior performance is attributed to the conductive π-conjugated GDY framework, which provides abundant accessible active sites and facilitates rapid electron transfer. These results highlight CoB x /GDY as a promising bifunctional catalyst for energy-efficient hydrogen production from urea-rich wastewater and offer a general strategy for designing advanced transition-metal/graphdiyne hybrid electrocatalysts.

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Energy-efficient bifunctional CoB <sub> <i>x</i> </sub> /GDY catalyst for urea-assisted hydrogen production <i>via</i> electrochemical urea oxidation and hydrogen evolution

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