Pt-Based Electrocatalyst Modified by CsH2PO4/SiP2O7 for Electrochemical Oxidation of NH3 to H2 in Solid Acid Electrolysis Cell

Ammonia (NH3) has received much attention as a hydrogen carrier because it can be easily liquefied with high storage density and emits no greenhouse gas during the dihydrogen evolution process. The ammonia oxidation reaction (AOR) in an electrochemical system important merit which very high-purity obtained without additional separation process that is typically needed for thermochemical decomposition processes. Herein, AOR was carried out solid acid electrolysis cell (SAEC) at intermediate temperature around 250 °C, composite of CsH2PO4 mixed SiP2O7 used electrolyte Pt/C-based electrocatalysts were employed electrode materials both anode cathode. Pt/C material modified CsH2PO4/SiP2O7 order to enhance electrocatalytic activity improved H2 production rate. Over SAEC reported here, performance current 67.1 mA/cm2 Faradaic efficiency (FE) 98.2%. This study suggest significant potential carbon-free from selective NH3.