Journal
SCIENCE
Volume 365, Issue 6451, Pages 367-+Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aax4608
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Funding
- France-Canada Research Fund (New Scientific Collaboration Support Program)
- Canadian Natural Science and Engineering Research Council [RGPIN 337345-13]
- Canadian Foundation for Innovation [229288]
- Canadian Institute for Advanced Research [BSE-BERL-162173]
- Canada Research Chairs
- Air Liquide
- Institut Universitaire de France
- University of British Columbia
- China Scholarship Council (CSC) [201606220034]
- Canada First Research Excellence Fund, Quantum Materials and Future Technologies Program
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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/cm(2)), but maintaining high selectivities at high current densities and efficiencies remains a challenge. Molecular CO2 RR 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/cm(2). 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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