In Situ Fast Construction of Ni 3 S 4 /FeS Catalysts on 3D Foam Structure Achieving Stable Large-Current-Density Water Oxidation
By increasing the content of Ni , the catalytic activity of nickel-based catalysts for the oxygen evolution reaction (OER), which is still problematic with current synthesis routes, can be increased. Herein, a Ni -rich of Ni S /FeS on FeNi Foam (Ni S /FeS@FNF) via anodic electrodeposition to direct...
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Veröffentlicht in: | Small (Weinheim an der Bergstrasse, Germany) Germany), 2024-05, Vol.20 (22), p.e2308371 |
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Hauptverfasser: | , , , , , , , , |
Format: | Artikel |
Sprache: | eng |
Online-Zugang: | Volltext |
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Zusammenfassung: | By increasing the content of Ni
, the catalytic activity of nickel-based catalysts for the oxygen evolution reaction (OER), which is still problematic with current synthesis routes, can be increased. Herein, a Ni
-rich of Ni
S
/FeS on FeNi Foam (Ni
S
/FeS@FNF) via anodic electrodeposition to direct obtain high valence metal ions for OER catalyst is presented. XPS showed that the introduction of Fe not only further increased the Ni
concentration in Ni
S
/FeS to 95.02%, but also inhibited the dissolution of NiOOH by up to seven times. Furthermore, the OER kinetics is enhanced by the combination of the inner Ni
S
/FeS heterostructures and the electrochemically induced surface layers of oxides/hydroxides. Ni
S
/FeS@FNF shows the most excellent OER activity with a low Tafel slope of 11.2 mV dec
and overpotentials of 196 and 445 mV at current densities of 10 and 1400 mA cm
, respectively. Furthermore, the Ni
S
/FeS@FNF catalyst can be operated stably at 1500 mA cm
for 200 h without significant performance degradation. In conclusion, this work has significantly increased the high activity Ni
content in nickel-based OER electrocatalysts through an anodic electrodeposition strategy. The preparation process is time-saving and mature, which is expected to be applied in large-scale industrialization. |
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ISSN: | 1613-6810 1613-6829 |
DOI: | 10.1002/smll.202308371 |