Electrode materials Response time (s) Detection limit (μM) Linear range (μM) Ref. Au/PPy/GCE - 0.2 1–500 27 Nano-Au/Ti - 42 500–4000 28 Hematoxylin multi-wall carbon nanotubes <2 0.68 2.0–122.8 29 Copper oxide nanoarray <5 0.17 - 30 BiHCF-modified CCE - 3 7.0–1010 31 Curcumin multi-wall carbon nanotubes <3 1.4 2–44 32 Carbon nanotubes and catechol derivatives <2 0.050 0.50–6.5 33 Nano-Au/Porous-TiO2 /GCE <3 0.5 2.5–500 34 PVP–A gNCs <2 1.1 5 to 460 35 Ni0.95-La0.05-RVC - 140 50–5000 36 TiO2-AuNP1 <2 0.020 0.010-1000 This work TiO2-AuNP2 <5 0.100 0.100-1000 This work

Table 1: A comparison of electrocatalytic detection of hydrazine using various type of modified electrode systems.