催化作用
选择性
化学
电化学
电流(流体)
二氧化碳电化学还原
氧化还原
纳米技术
材料科学
化学工程
组合化学
电极
无机化学
一氧化碳
物理化学
有机化学
热力学
物理
工程类
作者
Shaoxuan Ren,Dorian Joulié,Danielle A. Salvatore,Kristian Torbensen,Min Wang,Marc Robert,Curtis P. Berlinguette
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2019-07-26
卷期号:365 (6451): 367-369
被引量:608
标识
DOI:10.1126/science.aax4608
摘要
Practical electrochemical carbon dioxide (CO2) conversion requires a catalyst capable of mediating the efficient formation of a single product with high selectivity at high current densities. Solid-state electrocatalysts achieve the CO2 reduction reaction (CO2RR) at current densities ≥ 150 milliamperes per square centimeter (mA/cm2), but maintaining high selectivities at high current densities and efficiencies remains a challenge. Molecular CO2RR catalysts can be designed to achieve high selectivities and low overpotentials but only at current densities irrelevant to commercial operation. We show here that cobalt phthalocyanine, a widely available molecular catalyst, can mediate CO2 to CO formation in a zero-gap membrane flow reactor with selectivities > 95% at 150 mA/cm2 The revelation that molecular catalysts can work efficiently under these operating conditions illuminates a distinct approach for optimizing CO2RR catalysts and electrolyzers.
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