Fe and Cu dual-doped Ni<subscript>3</subscript>S<subscript>4</subscript> nanoarrays with less low-valence Ni species for boosting water oxidation reaction.
In: Dalton Transactions: An International Journal of Inorganic Chemistry, Jg. 51 (2022-01-28), Heft 4, S. 1594-1602
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Zugriff:
Transition metal materials with high efficiency and durable electrocatalytic water splitting activity have attracted widespread attention among scientists. In this work, two cation co-doped Ni 3 S 4 nanoarrays grown on a Ni foam support were firstly synthesized through a typical two step hydrothermal process. Cu and Fe co-doping can regulate the internal electron configuration of the material, thus reducing the activation energy of the active species. Moreover, density functional theory calculations demonstrate that a low Ni 2+ amount improves the adsorption energy of H 2 O, which facilitates the formation and reaction of intermediate species in the water splitting process. The experimental results indicate that the Cu and Fe co-doped Ni 3 S 4 material has superior electrochemical activity for water oxidation reaction to pure Ni 3 S 4 , Fe doped Ni 3 S 4 and Cu doped Ni 3 S 4 . The Fe–Cu–Ni 3 S 4 material displays a significantly enhanced electrocatalytic performance with low overpotentials of 230 mV at 50 mA cm −2 and 260 mV at 100 mA cm −2 for the oxygen evolution reaction under alkaline conditions. It's worth noting that when Fe–Cu–Ni 3 S 4 was used as the anode and cathode, a small cell voltage of 1.59 V at 10 mA cm −2 was obtained to achieve stable overall water splitting. Our work will afford a novel view and guidance for the preparation and application of efficient and environmentally friendly water splitting catalysts. [ABSTRACT FROM AUTHOR]
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Titel: |
Fe and Cu dual-doped Ni<subscript>3</subscript>S<subscript>4</subscript> nanoarrays with less low-valence Ni species for boosting water oxidation reaction.
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Autor/in / Beteiligte Person: | Du, Xiaoqiang ; Li, Jiaxin ; Zhang, Xiaoshuang |
Zeitschrift: | Dalton Transactions: An International Journal of Inorganic Chemistry, Jg. 51 (2022-01-28), Heft 4, S. 1594-1602 |
Veröffentlichung: | 2022 |
Medientyp: | academicJournal |
ISSN: | 1477-9226 (print) |
DOI: | 10.1039/d1dt03902d |
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