CO<sub>2</sub> electrolysis to multicarbon products in strong acid

doi:10.1126/science.abg6582

GSTDTAP > 气候变化

DOI	10.1126/science.abg6582
	CO₂ electrolysis to multicarbon products in strong acid
	Jianan Erick Huang; Fengwang Li; Adnan Ozden; Armin Sedighian Rasouli; F. Pelayo García de Arquer; Shijie Liu; Shuzhen Zhang; Mingchuan Luo; Xue Wang; Yanwei Lum; Yi Xu; Koen Bertens; Rui Kai Miao; Cao-Thang Dinh; David Sinton; Edward H. Sargent
	2021-06-04
发表期刊	Science
出版年	2021
英文摘要	Electrochemical reduction of carbon dioxide (CO2) is a promising means of converting this greenhouse gas into valuable fuels and chemicals. However, two competing reactions restrict the efficiency of this process. In base, much of the CO2 is trapped as carbonate before reduction; in acid, protons outpace CO2 at catching electrons from the cathode. Huang et al. report that a high dose of potassium ions can help to solve the latter problem. By concentrating potassium ions at the electrode, high selectivity toward CO2 reduction at high current in acid is possible, which the authors attribute to electrostatic stabilization of the desired adsorbates. Science , abg6582, this issue p. [1074][1] Carbon dioxide electroreduction (CO2R) is being actively studied as a promising route to convert carbon emissions to valuable chemicals and fuels. However, the fraction of input CO2 that is productively reduced has typically been very low, <2% for multicarbon products; the balance reacts with hydroxide to form carbonate in both alkaline and neutral reactors. Acidic electrolytes would overcome this limitation, but hydrogen evolution has hitherto dominated under those conditions. We report that concentrating potassium cations in the vicinity of electrochemically active sites accelerates CO2 activation to enable efficient CO2R in acid. We achieve CO2R on copper at pH <1 with a single-pass CO2 utilization of 77%, including a conversion efficiency of 50% toward multicarbon products (ethylene, ethanol, and 1-propanol) at a current density of 1.2 amperes per square centimeter and a full-cell voltage of 4.2 volts. [1]: /lookup/doi/10.1126/science.abg6582
领域	气候变化 ; 资源环境
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/329872
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Jianan Erick Huang,Fengwang Li,Adnan Ozden,et al. CO₂ electrolysis to multicarbon products in strong acid[J]. Science,2021.
APA	Jianan Erick Huang.,Fengwang Li.,Adnan Ozden.,Armin Sedighian Rasouli.,F. Pelayo García de Arquer.,...&Edward H. Sargent.(2021).CO₂ electrolysis to multicarbon products in strong acid.Science.
MLA	Jianan Erick Huang,et al."CO₂ electrolysis to multicarbon products in strong acid".Science (2021).