Quantitative Operando Detection of Electro Synthesized Ammonia Using Mass Spectrometry

In this work the successful operando detection of synthesized ammonia from nitrogen reduction in non-aqueous electrolytes with an electron-ionization mass spectrometer was reported. Using selective ionization at 22 eV together a highly sensitive micro-chip-based electrochemistry spectrometry set-up, quantitative produced down to few pmol s?1 as well aqueous demonstrated. The well-defined electrochemical and transport environment thin-layer cell allowed for fundamental studies process, which shown produce faradaic efficiencies 49±3 % ambient pressure. Moreover, through capabilities developed method, it that production proceeded even after lithium electroplating had been terminated This potentially explained why higher mediated synthesis were observed under dynamic cycling conditions. Two possible mechanisms behavior proposed outlook towards future research given.