Design of high efficiency electrolysis cell for liquid ammonia utilization as hydrogen storage carrier

为设计高效液氨制氢电解槽，研究了电极形态和材料对液氨电解过电压的影响。对于电沉积法制备的铂黑电极，过电压降低与电极表面积无关，而与铂沉积量和沉积铂颗粒的大小有关。使用铂板电极进行电解时，阳极过电压是阴极过电压的5倍。采用铂-Ru电极可以降低阳极过电压，在理论电解电压0.1V左右进行氨气电解放出氢气。

The overvoltage reduction effects of electrode morphology and materials on liquid ammonia electrolysis were investigated to design high efficiency electrolysis cell for generating hydrogen from liquid ammonia. For Pt-black electrodes prepared by electrodeposition, it is clarified that the overvoltage reduction does not relate to the electrode surface area, but relates to both of Pt deposition amount and size of deposited Pt particles. For the electrolysis by using Pt plate electrode, anode overvoltage is five times as large as cathode one. Ammonia electrolysis with the emission of hydrogen gas was performed at 0.1 V around theoretical electrolysis voltage by adapting Pt-Ru electrode which can reduce the anode overvoltage.