Electrolysis of ammonia for hydrogen production catalyzed by Pt and Pt-Ir deposited on nickel foam

作     者：Min Jiang Dandan Zhu Xuebo Zhao 

作者机构：The Qingdao Key Lab of Solar Energy Utilization and Energy Storage TechnologyQingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of Sciences 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2014年第23卷第1期

页      面：1-8页

核心收录：

学科分类：0820[工学-石油与天然气工程] 0808[工学-电气工程] 081705[工学-工业催化] 0817[工学-化学工程与技术] 08[工学] 0807[工学-动力工程及工程热物理] 0827[工学-核科学与技术] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China(No.21103215) the Applied Basic Research Projects of Qingdao City(No.11-2-4-8-3-jch) 

主　　题：ammonia elelctrolysis nickel electrode hydrogen produciton catalyst power consumption 

摘      要：Electrolysis of ammonia in alkaline electrolyte solution was applied for the production of hydrogen. Both Pt-loaded Ni foam and Pt-Ir loaded Ni foam electrodes were prepared by electrodeposition and served as anode and cathode in ammonia electrolytic cell, respectively. The electrochemical behaviors of ammonia in KOH solution were individually investigated via cyclic voltammetry on three electrodes, i.e. bare Ni foam electrode, Pt-loaded Ni foam electrode and Pt-Ir loaded Ni foam electrode. The morphology and composition of the prepared Ni foam electrode were analyzed by scanning electron microscopy(SEM) and X-ray diffraction(XRD). Effects of the concentration of electrolyte solution and temperature of electrolytic cell on the electrolysis reaction were examined in order to enhance the efficiency of ammonia electrolysis. The competition of ammonia electrolysis and water electrolysis in the same alkaline solution was firstly proposed to explain the changes of cell voltage with the electrolysis proceeding. At varying current densities, different cell voltages could be obtained from galvanostatic *** low cell voltage of 0.58 V, which is less than the practical electrolysis voltage of water(1.6 V), can be obtained at a current density of2.5 mA/cm2. Based on some experimental parameters, such as the applied current, the resulting cell voltage and output of hydrogen gas, the power consumption per gram of H2produced can be estimated.