Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Research and Development Trends in Seawater Electrolysis Systems and Catalysts

해수 수전해 시스템 및 촉매 연구 개발 동향

  • Yoonseong Jung (Graduate School of Energy Science and Technology, Chungnam National University) ;
  • Tuan Linh Doan (Graduate School of Energy Science and Technology, Chungnam National University) ;
  • Ta Nam Nguyen (Graduate School of Energy Science and Technology, Chungnam National University) ;
  • Taekeun Kim (Graduate School of Energy Science and Technology, Chungnam National University)
  • 정윤성 (충남대학교 에너지과학기술대학원) ;
  • ;
  • ;
  • 김태근 (충남대학교 에너지과학기술대학원)
  • Received : 2023.10.11
  • Accepted : 2023.10.20
  • Published : 2023.12.10
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Abstract

Water electrolysis is undergoing active research as one of the promising technologies for producing effective green hydrogen. Using seawater directly as a raw material for a water electrolysis system can solve the problem of the limitations of existing freshwater raw materials, as seawater accounts for approximately 97% of the water on Earth. At the same time, abundant by-product materials can be obtained, representative examples of which are Cl2, ClO-, Br2, and Mg(OH)2 produced during electrolysis, depending on their composition and pH environment. In order to develop a successful seawater electrolysis system and oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) catalysts, it is necessary to understand the causes and consequences of reactions that occur in the seawater environment. Therefore, in this paper, we will investigate the reaction mechanism and characteristics of the seawater electrolysis system as well as the research and development trends of electrochemical catalysts used in anode and cathode electrodes.

물의 전기 분해는 효과적인 그린 수소를 생산하기 위한 유망한 기술 중 하나로서 활발한 연구가 이루어지고 있다. 수전해 시스템의 원료로 해수를 직접 사용하게 되면 지구상에 있는 물의 약 97%를 해수가 차지하고 있으므로, 기존 담수 원료의 제한성에 대한 문제를 해결할 수 있다. 동시에 풍부한 부생 원료를 얻을 수 있는데, 그 성분과 pH 환경에 따라 전기 분해 과정에서 생성되는 Cl2, ClO-, Br2 및 Mg(OH)2 등이 대표적이다. 성공적인 해수 수전해 시스템 개발과 이에 필수적인 산소발생반응(oxygen evolution reaction, OER)과 수소발생반응(hydrogen evolution reaction, HER) 촉매를 개발하기 위해서는 해수 환경에서 일어나는 반응의 원인과 결과에 대해 파악할 필요가 있다. 따라서 본 논문에서는 해수 수전해 시스템의 반응 메커니즘과 특징 및 애노드와 캐소드 전극에 사용되는 전기화학 촉매들의 연구 개발 동향에 대해 살펴보고자 한다.

Keywords

Acknowledgement

본 연구는 한국연구재단 생애첫연구사업 (NRF-2017R1C1B5018325) 지원에 의하여 수행되었음.

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