The Preparation Of LSCCF, SCFN, SSM, SSCN Powders And Their Cathode Catalytic Perfor- Mance In Electrosynthesis Ammonia

In this paper, ammonia was synthesized with the as-prepared cathode material, anode material and Nafion proton exchange membrane at atmospheric pressure and room temperature. The three sections of the experiment are as follows:(1)The La0.7Sr0.3-xCaxCo1-yFeyO3-δ(LSCCF), SmCo0.8Fe0.2-xNixO3-δ(SCFN), Sm1.5Sr0.5 MO4-δ(SSM), Sm1.5Sr0.5Co1-xNixO4-δ(SSCN) cathode powders and the Ni-Ce0.8Sm0.2O2-δ(Ni-SDC) anode powder were synthesized by the gol-gel method. The physical characters were characterized by X-Ray Diffraction(XRD), Transmission Electron Microscopy (TEM) and ThermoGravimetric-Differential Thermal Analysis (TG-DTA).(2) Ammonia was synthesized by H2 and N2 as raw materials, Nafion membrane as a proton exchange membrane, Ni-SDC as anoder LSCCF as cathode, at atmospheric pressure and room temperature. The results show that the highest rate of evolution of ammonia is 3.92×10-9 mol·s-1·cm-2 at 0.5 V when x=0.1,y=0.1.(3) Ammonia was synthesized in a single cell reactor by electrochemical methods with N2 and H2O as raw materials, Nafion proton exchange membrane as electrolyte, Pt electrode as anode, SCFN, SSM and SSCN as cathode, respectively, at atmospheric pressure and room temperature. The results demonstrate that the optimum voltage is 2 V, and ammonia has been detected in both the cathode and anode productions.