인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
DBpia AI
AI 에이전트
AI 아이디어
AI 리더
AI 뷰어
Citeasy
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지원사업
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커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
Electrochemical carbon dioxide reduction reaction using sustainable energy is a promising approach of synthesizing chemicals and fuels, yet is highly energy intensive. The oxygen evolution reaction is particularly problematic, which is kinetically sluggish and causes anodic carbon loss. In this context, we couple CO<sub>2</sub> electrolysis with hydrogen oxidation reaction in a single electrochemical cell. A Ni(OH)<sub>2</sub>/NiOOH mediator is used to fully suppress the anodic carbon loss and hydrogen oxidation catalyst poisoning by migrated reaction products. This cell is highly flexible in producing either gaseous (CO) or soluble (formate) products with high selectivity (up to 95.3%) and stability (>100 h) at voltages below 0.9 V (50 mA cm<sup>-2</sup>). Importantly, thanks to the "transferred" oxygen evolution reaction to a water electrolyzer with thermodynamically and kinetically favored reaction conditions, the total polarization loss and energy consumption of our H<sub>2</sub>-integrated CO<sub>2</sub> reduction reaction, including those for hydrogen generation, are reduced up to 22% and 42%, respectively. This work demonstrates the opportunity of combining CO<sub>2</sub> electrolysis with the hydrogen economy, paving the way to the possible integration of various emerging energy conversion and storage approaches for improved energy/cost effectiveness.
#Electrochemistry
#Hydrogen
#Formate
#Electrolysis of water
#Electrolysis
#Hydrogen production
#Catalysis
#Anode
#Materials science
#Chemistry
#Hydrogen fuel
#Carbon fibers
#Faraday efficiency
#Redox
#Hydrogen economy
#High-pressure electrolysis
#Chemical engineering
#Oxygen evolution
#Inorganic chemistry
#Electrode
#Organic chemistry
#Physical chemistry
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