Metal support interaction with carbonaceous electrodes as a heterogeneous catalyst is a trendy study area for boosting electrocatalysis with better conductivity, outstanding stability, and faster kinetics. By harnessing the power of defects caused by hetero-atom doping, interfacial effects, spatial confinement with a metal hydroxide, and the combination of two different dimensional materials, n-CDs@Gd(OH)3 exhibits an overpotential of 0.062 V with Tafel slope of 65 mV/dec at 10 mA/cm2 of current density, as well as a longer hydrogen evolution reaction endurance of 25 h. We attempted to relate it to heterogeneous material activity descriptors like surface potential and work function using a Scanning Kelvin Probe. This effect results in a 200-times reduction in resistance, particularly a 9.7 Ω reduction for 0.007 V change in charge transfer resistance. This study demonstrates that overcoming the primary challenges and enhancement of green hydrogen production can be achievable by rare earth metal combinations.