The electropositive nature of carbon plays a pivotal role in enhancing the HER efficiency, particularly in catalytic systems where carbon materials are employed. As carbon atoms become electropositive, they exhibit a stronger affinity for protons (H + ) due to the electrostatic attraction, facilitating the adsorption of protons onto the catalyst surface. This step is critical in lowering the activation energy of the HER, as it accelerates protonation and sets the stage for the subsequent electron transfer and hydrogen generation processes.