Ag@TiO2 as an Efficient Electrocatalyst for N2 Fixation to NH3 under Ambient Conditions

摘要

With the use of traditional Haber-Bosch N2 fixation, a huge amount of CO2 emission bring a huge burden to the environment. Electrochemical N2 reduction provides an environmental-friendly and sustainable alternative to NH3 synthesis at ambient conditions. Herein, we report our recent experimental finding that Ag composited with TiO2 can greatly improve the N2 reduction reaction performance of TiO2 toward ambient conversion. In 0.1 M Na2SO4 (pH = 7), such electrocatalyst achieves a large NH3 yield rate of 14.88 μg h~(-1) mg~(-1)_(cat) with a Faradaic efficiency of 6.2% at 0.70 V vs. reversible hydrogen electrode. Besides, it also demonstrates high electrochemical and structural stability for NH3 generation.