A Rare-Earth Samarium Oxide Catalyst for Electrocatalytic Nitrogen Reduction to Ammonia

A Rare-Earth Samarium Oxide Catalyst for Electrocatalytic Nitrogen Reduction to Ammonia

A new rare-earth Sm2O3 electrocatalyst was explored for an electrochemical dinitrogen reduction reaction (NRR). Theoretical calculations reveal that the surface-exposed Sm atoms of Sm2O3 could effectively catalyze the NRR and restrict hydrogen evolution. Experimentally, we prepared Sm2O3 nanoparticl...

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Veröffentlicht in:ACS sustainable chemistry & engineering 2020-09, Vol.8 (37), p.13908-13914
Hauptverfasser: Cheng, Yonghua, Nan, Haifeng, Li, Qingqing, Luo, Yaojing, Chu, Ke
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creator Cheng, Yonghua
Nan, Haifeng
Li, Qingqing
Luo, Yaojing
Chu, Ke
description A new rare-earth Sm2O3 electrocatalyst was explored for an electrochemical dinitrogen reduction reaction (NRR). Theoretical calculations reveal that the surface-exposed Sm atoms of Sm2O3 could effectively catalyze the NRR and restrict hydrogen evolution. Experimentally, we prepared Sm2O3 nanoparticles showing an NH3 yield of 27.2 μg h–1 mg–1 and a Faradaic efficiency of 11.5% at −0.6 V in 0.1 M Na2SO4, together with outstanding stability, thereby implying the potential of Sm2O3 and other rare-earth electrocatalysts for N2 electroreduction.
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