Narrowing High‐Valent Ni Formation Potential and Widening Urea Oxidation Window by Ni2P/MoP Hybrid Catalyst.
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| Title: | Narrowing High‐Valent Ni Formation Potential and Widening Urea Oxidation Window by Ni |
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| Authors: | Yin, Chun1 (AUTHOR), Yang, Fulin1 (AUTHOR), Liu, Terence2 (AUTHOR), Wang, Shuli3 (AUTHOR), Feng, Ligang1,3 (AUTHOR) ligang.feng@kust.edu.cn |
| Source: | Advanced Energy Materials. May2026, Vol. 16 Issue 20, p1-11. 11p. |
| Subject Terms: | *Electrocatalysts, *Hydrogen production, *Electrolytic oxidation, *Density functional theory, *Electrolysis, *Electrocatalysis, *Electron density |
| Abstract: | Achieving selective and energy‐efficient urea oxidation is a key challenge in urea‐assisted water electrolysis due to sluggish activation of nickel sites and their limited active potential range. Here, we construct Ni2P/MoP embedded in conductive carbon nanofibers (Ni2P/MoP/CNFs) that couple precise interfacial charge redistribution with synergistic electronic modulation to accelerate high‐valent Ni3+ sites formation (50 vs. 140 mV of Ni2P) and expand urea oxidation potential window (290 vs. 150 mV of Ni2P). Electronic coupling shifts the Ni d‐band center, promoting rapid Ni2+/Ni3+ transformation and optimizing intermediate adsorption–desorption. In situ Raman and FTIR analyses identify NiOOH as the active phase that facilitates early‐stage C─N bond cleavage and suppresses oxygen evolution up to 110 mV beyond its onset in the pure Ni2P system. Supported by density functional theory calculations, this interfacial modulation reduces the energy barrier for urea oxidation from 1.84 to 1.76 eV. Benefiting from this unique electronic structure, Ni2P/MoP/CNFs achieve a current density of 141.2 mA cm−2 at 1.54 V, 2.9 times that of the Ni2P/CNFs; and it also shows good stability in the urea electrolysis for hydrogen generation over 100 h. This work advances efficient hydrogen production via urea electrolysis by bridging Ni activation kinetics and oxidation selectivity. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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