Raman spectroscopy was used to confirm the presence of MoS 2 QDs on the MoS 2 @NiFeCo-Mo(doped)-LDH and MoS 2 @NiFeCo-LDH electrodes (Figure ). The Raman spectra of MoS 2 @NiFeCo-Mo(doped)-LDH and MoS 2 @NiFeCo-LDH samples exhibit two vibrational modes at around 385.1 and 428.4 cm -1 . These correspond to the E 2 g and A 1 g modes of MoS 2 , respectively. The Raman and XRD spectra together conclusively demonstrate that crystalline MoS 2 QDs have successfully been deposited on the LDH matrix. As Figure shows, the intensity of both the A 1 g and E 2 g peaks is weaker for MoS 2 @NiFeCo-Mo(doped)-LDH than for MoS 2 @NiFeCo-LDH, which is likely due to the smaller MoS 2 nanosheets on NiFeCo-Mo(doped)-LDH. The Raman peaks around 458, and 552 cm -1 for MoS 2 @NiFeCo-Mo(doped)-LDH and MoS 2 @NiFeCo-LDH correspond to Fe 3+ /Ni 2+ /Co 3+ -O-Ni 2+ /Co 3+ and Fe 3+ -O-Fe 3+ bonds (M-O-M), respectively. The broad band around 920cm -1 corresponds to Mo-O and indicates that Mo may be oxidized. Altogether, the Raman spectra, XRD, and HR-TEM analysis conclusively show that crystalline MoS 2 QDs have been successfully synthesized on the NiFeCo-LDH and NiFeCo-Mo(doped)-LDH substrates.