Rare earth ion doping regulates the electronic structure of MIL-101 to promote electrocatalytic nitrogen reduction reaction
Electrocatalytic nitrogen reduction reaction(eNRR)is considered as an effective strategy for producing NH3/NH4+with low concentrations under environmental conditions,and designing appropriate catalysts is the key to efficiently driving eNRR.This study used a hydrothermal method to prepare MIL-101 catalyst and investigated the effects of hydrothermal temperature and Gd element doping on the eNRR performance of MIL-101 catalyst.The results show that 150-M-101 has the highest crystallinity and eNRR performance(NH3 yield of 11.5μg/(h·mg),Faraday efficiency of 30.5％).The surface of MIL-101-0.5Gd is concave,exposing the internal rough pore structure,improving the apparent activity of the catalyst.At the same time,the increase of oxygen vacancy concentration optimizes the characteristic activity of the catalyst,the NH3 yield and Faraday efficiency at 0.1 mol/L LiClO4 electrolyte and-1.3 V potential are 16.7 μg/(h·mg)and 37.6％,respectively,which are better than undoped 150-MIL-101.The catalyst also has good long-term stability.
rare earth iondefective engineeringelectrocatalytic nitrogen reductionmorphological controlelectronic transfer promotion
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维普
