期刊
ENERGIES
卷 15, 期 13, 页码 -出版社
MDPI
DOI: 10.3390/en15134645
关键词
NiFe layered double hydroxides (NiFe LDHs); oxygen evolution reaction (OER); anion exchange membrane water electrolyzer (AEMWE)
资金
- Key Program of the National Natural Science Foundation of China [22090032, 22090030]
- Joint Fund of the Yulin University and the Dalian National Laboratory for Clean Energy [YLU-DNL Fund 2021001]
In this study, a self-supporting NiFe LDHs nanoflower cluster OER electrode was synthesized by a one-step impregnation method, showing excellent activity and stability in a three-electrode system and as the anode of AEMWE. The electrode exhibited special morphological structure that facilitated active site exposure and mass transfer under high current density. The experimental results demonstrate the electrode's advantages of good activity and low cost, making it promising for industrial application.
The development of an efficient and durable oxygen evolution reaction (OER) electrode is needed to solve the bottleneck in the application of an anion exchange membrane water electrolyzer (AEMWE). In this work, the self-supporting NiFe layered double hydroxides (NiFe LDHs) nanoflower cluster OER electrode directly grown on the surface of nickel fiber felt (Ni fiber) was synthesized by a one-step impregnation at ambient pressure and temperature. The self-supporting NiFe LDHs/Ni fiber electrode showed excellent activity and stability in a three-electrode system and as the anode of AEMWE. In a three-electrode system, the NiFe LDHs/Ni fiber electrode showed excellent OER performance with an overpotential of 208 mV at a current density of 10 mA cm(-2) in 1 M KOH. The NiFe LDHs/Ni fiber electrode was used as the anode of the AEMWE, showing high cell performance with a current density of 0.5 A cm(-2) at 1.68 V and a stability test for 200 h in 1 M KOH at 70 degrees C. The electrocatalytic performance of NiFe LDHs/Ni fiber electrode is due to the special morphological structure of nanoflower cluster petals stretching outward to produce the tip effect, which is beneficial for the exposure of active sites at the edge and mass transfer under high current density. The experimental results show that the NiFe LDHs/Ni fiber electrode synthesized by the one-step impregnation method has the advantages of good activity and low cost, and it is promising for industrial application.
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