Ternary AuPS Alloy Mesoporous Film for Efficient Electroreduction of Nitrogen to Ammonia
Zechuan Dai1, Wenjing Tian1, Ziqiang Wang1
1State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
Abstract:
Electrocatalytic nitrogen reduction is a promising strategy to produce ammonia with low energy consumption and an ambient operation condition. Owing to extreme difficulties in nitrogen activation, the design of high-efficiency electrocatalysts is still a great challenge. This work proposes a versatile electrodeposition strategy to construct P, S-codoped Au mesoporous film on carbon paper (mAuPS/CP) using polystyrene-b-poly (ethylene oxide) micelles as surfactants. The continuous mesoporous structure and nonmetal element doping can change the electronic structure and provide sufficient active sites, leading to enhanced N2 adsorption and reduced hydrogen evolution reaction (HER) process. Expectedly, the mAuPS/CP exhibits superior performance [NH3 yield: 58.2 μg h-1 mg-1cat.; Faradaic efficiency (FE): 25.7%] to the counterpart without doping in a neutral electrolyte. This research offers an ingenious method to directly synthesize P, S-codoped mesoporous noble metals for effective ammonia electrosynthesis.
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