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Updated: Jan 12, 2026

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
Published on: December 6, 2021
Energy-efficient bifunctional CoB x /GDY catalyst for urea-assisted hydrogen production via electrochemical urea
Teng Liu1, Ting Wang1, Hao Niu1
1School of Chemistry & Chemical Engineering, Linyi University Linyi 276000 PR China yinxuepeng@lyu.edu.cn.
Abstract:
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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