Heterogeneous Fe-Doped Ni(OH)2 Grown on Nickel Mesh by Electrodeposition for Efficient Alkaline Oxygen Evolution Reaction.
Chemistry
; 29(69): e202302055, 2023 Dec 11.
Article
em En
| MEDLINE
| ID: mdl-37720979
ABSTRACT
Designing highly excellent and stable catalysts for alkaline oxygen evolution reaction (OER) is gradually pivotal for clean energy development. In this work, a heterogeneous Fe-doped Ni(OH)2 (Ni/Fe-0.1) was developed via simple one-step electrodeposition onto nickel mesh. The heterogeneous interface structure generates sufficient active sites, significantly improving OER performance with an overpotential of 174â
mV at 10â
mA cm-2 (η10 ), while Tafel slope is only 43.0â
mV dec-1 . In particular, Ni/Fe-0.1 is still able to operate stably at a current density of 1â
A cm-2 for 100â
h without obvious potential decay. The oxidation of Ni2+ to Ni3+ was detected by X-ray photoelectron spectroscopy, proving that the heterogeneous catalyst could stabilize the high-valence state of nickel as active sites to its superior OER performance. This work provides a convenient synthetic strategy for forming heterogeneous catalysts toward efficient water electrolysis.
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MEDLINE
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En
Ano de publicação:
2023
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Article