Nitrogen substitution induced lattice contraction in nickel nanoparticles for electrochemical hydrogen evolution from simulated seawater.
Chem Commun (Camb)
; 59(40): 6084-6087, 2023 May 16.
Article
em En
| MEDLINE
| ID: mdl-37128969
ABSTRACT
Herein, we demonstrate a facile method for the introduction of nitrogen in the lattices of nickel nanoparticles to form NiNx (x = 0.13, 0.20, 0.27). X-ray absorption spectroscopy reveals the contraction of the Ni-Ni bond and modulated coordination environment after nitrogen introduction. The NiN0.20 required 87 mV overpotential for -10 mA cm-2 cathodic current density in simulated seawater. The density functional theory calculations revealed favorable EH2Oads and ΔGHads after N-introduction.
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MEDLINE
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En
Ano de publicação:
2023
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Article