Rapid mass production of iron nickel oxalate nanorods for efficient oxygen evolution reaction catalysis
The NiFe layered-double-hydroxide (NiFe-LDH) and the NiFe metal-organic framework (NiFe-MOF) demonstrate the best catalytic activity among NiFe-based materials for the oxygen evolution reaction (OER), which is important for efficient hydrogen production. However, the preparation processes of these m...
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Veröffentlicht in: | New journal of chemistry 2021-12, Vol.46 (1), p.328-333 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The NiFe layered-double-hydroxide (NiFe-LDH) and the NiFe metal-organic framework (NiFe-MOF) demonstrate the best catalytic activity among NiFe-based materials for the oxygen evolution reaction (OER), which is important for efficient hydrogen production. However, the preparation processes of these materials are usually cumbersome and have a low yield, which eliminates their most critical advantage of being low cost. We propose a method for rapidly and efficiently preparing porous (Ni
0.5
Fe
0.5
)C
2
O
4
nanorods with an excellent OER catalytic performance. The overpotential of (Ni
0.5
Fe
0.5
)C
2
O
4
is 266 mV at 20 mA cm
−2
under alkaline conditions, and the Tafel slope is 54.39 mV dec
−1
. Furthermore, analysis of the changes in the surface properties of the material before and after catalysis determined that the real active material is (Ni
0.5
Fe
0.5
)(OH)
x
(C
2
O
4
)
1−
x
. Using a simple scaled-up experiment, (Ni
0.5
Fe
0.5
)C
2
O
4
is mass-produced (40 g)
via
direct synthesis in 5 min. The composition and performance of the mass-produced sample are analysed under the same conditions, and (Ni
0.5
Fe
0.5
)C
2
O
4
still has a good catalytic performance and its composition has not changed. The efficient synthesis of (Ni
0.5
Fe
0.5
)C
2
O
4
nanorods with a porous structure provides a new option for the development of commercial catalysts using non-precious metals.
Using a coprecipitation method we synthesized an oxalate, which has a good catalytic performance for oxygen evolution in an alkaline electrolyte. This method can efficiently synthesize a large number of electrocatalysts in a short time. |
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ISSN: | 1144-0546 1369-9261 |
DOI: | 10.1039/d1nj04668c |