Catalysts, Journal Year: 2024, Volume and Issue: 14(8), P. 496 - 496

Published: Aug. 1, 2024

The electrocatalytic oxidation of urea combined with wastewater splitting is considered a promising approach for sustainable hydrogen production, characterized by minimal energy consumption. However, its evolution greatly hindered the shortage efficient and easily accessible materials. Here, facile electrochemical activation strategy was conceived proposed to construct Cu-doped NiOOH nanolayer encapsulated on Cu2O nanodendrites Cu mesh substrate (Cu-NiOOH/Cu2O/CM) from electrodeposited Ni/Cu2O/CM heterostructured precatalyst. It verified that incorporation not only facilitates rapid formation Ni(III) species but also contributes Cu-Ni(III) bifunctional active sites. Benefiting dual sites, high surface area, good hydrophilic aerophobic properties superior electrical conductivity substrate, as-prepared Cu-NiOOH/Cu2O/CM exhibits enhanced abilities reaction (UOR) (HER). Particularly, Cu-NiOOH/Cu2O/CM||Cu-NiOOH/Cu2O/CM configuration toward UOR||HER coupled system, significantly reduced cell voltage 1.43 V vs. RHE @ 10 mA·cm−2 obtained. observed conventional overall water approximately 190 mV higher than splitting. This study proposes viable achieve optimize UOR/HER performance species, which holds significant importance stable generation urea-contaminated substandard water.

Language: Английский