Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Characterization of Electrochemical Ammonia Electrolysis Using a Platinum Electrode for Anodic Reaction

Pt포일 양극을 이용한 전기화학적 암모니아 수전해 특성 연구

  • CHOI, JEONGMIN (School of Mechanical Engineering, Pusan National University) ;
  • KIM, HAKDEOK (School of Mechanical Engineering, Pusan National University) ;
  • SONG, JUHUN (School of Mechanical Engineering, Pusan National University)
  • Received : 2022.07.22
  • Accepted : 2022.08.19
  • Published : 2022.08.30
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Abstract

In this study, a water electrolysis was studied to investigate the effect of ammonia on current density and H2 gas production. A H type cell with three electrodes was used and KOH solution was used as electrolyte. The conventional platinum foil was used for working electrode, whereas nickel foam was used for counter electrode. CV experiment was performed to see the activity of ammonia oxidation reaction. In addition, CP experiment was done to examine the dependence of Faraday efficiency of hydrogen on current density and NH3 concentration. The CV result shows the 0.5M NH3 concentration required for highest current density and reliable operation. The CP result shows the increased current density leads to higher H2 generation. The higher H2 production and subsequent energy efficiency was observed for 0.5M NH3 using a Pt/13%Rh coil for a cathode as compared to those in water electrolysis.

Keywords

Acknowledgement

이 과제는 부산대학교 기본연구지원사업(2년)에 의하여 연구되었다.

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