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Abstract
Electrocatalytic Nitrogen Reduction (NRR) under ambient conditions is a potential alternative artificial nitrogen fixation approach to the costly and unsustainable Haber-Bosch process. To realize the practical applications of NRR, it is necessary to develop cost-effective, high-activity electrocatalysts. In this paper, we report amorphous CeO2 doped NIiSb2O6 nanofibers as cathode for electrocatalytic NRR. The CeO2 doping exhibits a remarkable synergistic superiority with appropriate annealing temperature, inducing the transforming of NiSb2O6 into amorphous. Amorphous CeO2 doped NIiSb2O6 nanofibers benefit from the intrinsic defects of amorphization, showing outstanding electrocatalytic NRR performance with high average yield (NH3: 1.44 × 10-11mol s-1 cm-2, Faradaic efficiency: 12.47%). This work offers a novel approach to optimize the NH3 yields and Faradaic efficiencies by tuning the crystallinity of NRR electrocatalyst.
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