Journal
SURFACES AND INTERFACES
Volume 12, Issue -, Pages 102-107Publisher
ELSEVIER
DOI: 10.1016/j.surfin.2018.05.006
Keywords
NiFe-LDH; Ni foam; Nanosheet; Nonenzymatic; H2O2; Sensor
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Here, NiFe-LDH grown on Ni foam was successfully synthesized through a facile one-step hydrothermal approach and then directly applied as the electrode for nonenzymatic H2O2 sensor. The structure and morphology, of the as-synthesized NiFe-LDH were firstly characterized by X-ray diffraction (XRD), scanning electronic microscopy (SEM) and transmission electron microscopy (TEM). It is found that NiFe-LDH nanosheets assemble differently on inner and outer Ni foam with different Fe contents. The subsequent electrochemical measurements showed that the NiFe-LDH/Ni foam electrode exhibited remarkable electrocatalytic activity towards H2O2 oxidation with a high sensitivity of 1704 mu A mM(-1) cm(-2) (0.5 mu M to 0.84 mM) and low limit of detection (0.5 mu M). These impressive performances indicate that the NiFe-LDH nanosheets is a promising candidate for nonenzymatic H2O2 sensors.
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