Abstract
Hydrogen evolution reaction (HER) is important for hydrogen generation. Due to the scarcity and high cost of noble metal-based electrocatalysts, it is eager to develop non-precious metal electrocatalysts. In this work, atomic cobalt decorated on N-doped three-dimensional graphene (Co SA/3D-NG) electrocatalyst has been synthesized. Due to the hierarchical porous structure of three-dimensional graphene by coupling effects between Co and N, the Co SA/3D-NG electrocatalyst exhibits an enhanced HER activity. The potential is -180 mV at -10 mA cm−2 and the Tafel slope is 102.53 mV dec−1. It also presents highly electro-catalytic stability in acidic electrolytes. The work reveals a facile pathway to synthesizing efficient HER electrocatalysts.
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