Abstract
Developing highly efficient hydrogen evolution catalysts with low cost has been a big challenge in industrial applications. Herein, we developed non-metallic heteroatoms doped waste cypress biomass-derived biochar via a facile one-step pyrolysis route. By utilizing defect engineering and charge carriers facilitation, we have constructed appropriated defects with numerous charge carriers for manufacturing efficient catalysts for Hydrogen Evolution Reaction (HER). Through N(0.75), S(0.25)-CBC, we attained a low over-potential value of 122 mV at the current density of 10 mA cm−2 and minimized the Tafel slope value of 112 mV dec−1 in 1 M KOH solution for HER. Furthermore, it attained robust chemical stability of over 50,000 s without any degradation. Hence, this work provides a practical pathway to synthesize cost-effective, non-metallic heteroatoms doped efficient catalysts for hydrogen generation.
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