Development of Ammonia Electrolysis System CsH2PO4/SiP2O7 in Solid Acid Cell
- Title
- Development of Ammonia Electrolysis System CsH2PO4/SiP2O7 in Solid Acid Cell
- Authors
- 김지훈
- Date Issued
- 2024
- Publisher
- 포항공과대학교
- Abstract
- Ammonia (NH3) has received much attention as a hydrogen carrier because it can be easily liquefied with a high hydrogen storage density and emits no greenhouse gas during the dihydrogen evolution process. The ammonia oxidation reaction (AOR) in an electrochemical system has an important merit in which a very high-purity dihydrogen gas can be obtained without an additional separation process that is typically needed for thermochemical decomposition processes. Herein, the electrochemical AOR was carried out in a solid acid electrolysis cell (SAEC) at an intermediate temperature around 250 ℃, in which a solid composite of CsH2PO4 mixed with SiP2O7 was used as an electrolyte and Pt/C-based electro-catalysts were employed as the electrode materials of both anode and cathode. The Pt/C electrode material was modified with the CsH2PO4/SiP2O7 electrolyte in order to enhance the electro-catalytic activity for the AOR with an improved H2 production rate. Over the SAEC system reported here, a high AOR performance was obtained with a current density of 67.1 mA/cm2 and Faradaic efficiency (FE) of 98.2%. This study can suggest the significant potential of SAEC for the carbon-free H2 production from the selective electrochemical oxidation of NH3.
- URI
- http://postech.dcollection.net/common/orgView/200000732142
https://oasis.postech.ac.kr/handle/2014.oak/123301
- Article Type
- Thesis
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