Electrochemical $CO_2$ reduction using alkaline membrane electrode assembly on various metal electrodes = 음이온 교환막을 이용한 막전극접합체에서의 여러 금속의 전기화학적 이산화탄소 환원

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Electrochemical $CO_2$ reduction ($CO_2RR$), which is considered as promising technology to reduce atmospheric $CO_2$ concentration and store renewable energy, is suffer from mass transport problem of $CO_2$ and high cell resistance of conventional liquid phase reactor. Here we report a membrane electrode assembly $CO_2RR$ cell using gas diffusion electrode and anion exchange membrane (AEM) which provide suitable condition for the electrochemical $CO_2$ reduction reaction. $CO_2$ reduction activity of various metals (Pd, Ag, Zn, Cu, Sn, Ru, Pt, Ni) were observed. Among them, Pd, Ag showed high current density (200~ mA $cm^{-2}$ at -3.0 V) and faradaic efficiency (95~ %) toward $CO_2RR$, while system was operated at mild condition (30 °C, 1 atm) and showing low cell resistance ($< 0.150 m\omega$). Furthermore, carbon supported Pd catalyst was tested to maximize usage of precious metal and it showed higher current density, CO selectivity and stability over bare Pd black. Flow rate effect was also investigated in order to achieve highest $CO_2$ conversion.
Advisors
Lee, Hyunjooresearcher이현주researcher
Description
한국과학기술원 :생명화학공학과,
Publisher
한국과학기술원
Issue Date
2019
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2019.2,[1책 :]

Keywords

Electrochemical $CO_2$ reduction▼aelectrolyzer▼amembrane electrode assembly▼aanion exchange membrane▼apalladium; 전기화학적 이산화탄소 환원▼a전해조▼a막전극접합체▼a음이온교환막▼a팔라듐

URI
http://hdl.handle.net/10203/266369
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=843735&flag=dissertation
Appears in Collection
CBE-Theses_Master(석사논문)
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