▎ 摘　　要

We are reporting a facile in situ electrodeposition approach to prepare a rational design of M-Al (M: Ni, Co) layered double hydroxide (LDH)/reduced graphene oxide (G) hybrids and its superior electrocatalytic activity towards the electrooxidation of dopamine. Comparatively, the worm like interconnected nano-chain networks of as-prepared NiAl-LDH/G hybrid modified electrode exhibits better performance than the CoAl-LDH/G hybrid modified electrode. The enhanced electrocatalytic activity is because of its morphological evolution, which is due to its enhanced reduction rate, attachment pathway and incorporation or heterogeneous combination of Al3+ in the bimetallic LDHs/G hybrid. The satisfactory results are obtained for modified electrodes for the real-time quantitative detection of dopamine in the real injectable medicine as well as human blood serum samples and it has also shown good reproducibility, stability and anti-interference. This cost-effective and facile in situ electrodeposition approach will give insights to design high performing hybrid materials and its application to non-invasive electrochemical sensing which will be useful for daily diagnosis of neurological disorder.