AI Article Synopsis
- Molecular catalysts exhibit high selectivity for converting CO electrochemically but struggle with lower current densities compared to solid-state catalysts.
- A Fe porphyrin combined with carbon black on carbon paper led to fast and selective CO electrochemical conversion, achieving a current density up to 83.7 mA/cm² with 98% selectivity at neutral pH.
- In basic conditions (pH 14), the catalyst maintained a current density of 27 mA/cm² for 24 hours with 99.7% selectivity and reached a record energy efficiency of 71%. Additionally, it achieved 152 mA/cm² at a low overpotential of 470 mV, surpassing traditional
Article Abstract
Molecular catalysts have been shown to have high selectivity for CO electrochemical reduction to CO, but with current densities significantly below those obtained with solid-state materials. By depositing a simple Fe porphyrin mixed with carbon black onto a carbon paper support, it was possible to obtain a catalytic material that could be used in a flow cell for fast and selective conversion of CO to CO. At neutral pH (7.3) a current density as high as 83.7 mA cm was obtained with a CO selectivity close to 98 %. In basic solution (pH 14), a current density of 27 mA cm was maintained for 24 h with 99.7 % selectivity for CO at only 50 mV overpotential, leading to a record energy efficiency of 71 %. In addition, a current density for CO production as high as 152 mA cm (>98 % selectivity) was obtained at a low overpotential of 470 mV, outperforming state-of-the-art noble metal based catalysts.
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| http://dx.doi.org/10.1002/chem.202000160 | DOI Listing |
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