A Pd/MnO2 Electrocatalyst for Nitrogen Reduction to Ammonia under Ambient Conditions

Catalysts

Chang Sun¹  Yuxin Wang¹  Yingxin Mu¹ 

[1] State Key Laboratory of Chemical Engineering, School of Chemical Engineering, Tianjin University, Tianjin 300350, China;

关键词: electrochemical synthesis of ammonia;    palladium;    ambient conditions;    MnO₂;    synergistic catalytic;   

DOI  :  10.3390/catal10070802

来源: DOAJ

【 摘 要 】

Electrochemical ammonia synthesis, which is an alternative approach to the Haber–Bosch process, has attracted the attention of researchers because of its advantages including mild working conditions, environmental protection, and simple process. However, the biggest problem in this field is the lack of high-performance catalysts. Here, we report high-efficiency electroreduction of N₂ to NH₃ on γ-MnO₂-supported Pd nanoparticles (Pd/γ-MnO₂) under ambient conditions, which exhibits excellent catalytic activity with an NH₃ yield rate of 19.72 μg·mg⁻¹_Pd h⁻¹ and a Faradaic efficiency of 8.4% at −0.05 V vs. the reversible hydrogen electrode (RHE). X-ray diffraction (XRD) and transmission electron microscopy (TEM) characterization shows that Pd nanoparticles are homogeneously dispersed on the γ-MnO₂. Pd/γ-MnO₂ outperforms other catalysts including Pd/C and γ-MnO₂ because of its synergistic catalytic effect between Pd and Mn.

【 授权许可】

Unknown