Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 144, Issue 17, Pages 7551-7556Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.1c13024
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Funding
- UKRI-EPSRC [EP/V011863/1, EP/P034497/1, EP/N010531/1]
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Selective CO2 reduction can be achieved in a zero-gap BPM device using acid-tolerant Ni molecular electrocatalysts. This study highlights the importance of developing acid-tolerant catalysts for large-scale CO2 reduction devices.
The scaling-up of electrochemical CO2reduction requires circumventing the CO2loss as carbonates under alkalineconditions. Zero-gap cell configurations with a reverse-bias bipolar membrane (BPM) represent a possible solution, but the catalystlayer in direct contact with the acidic environment of a BPM usually leads to H2evolution dominating. Here we show that usingacid-tolerant Ni molecular electrocatalysts selective (>60%) CO2reduction can be achieved in a zero-gap BPM device using a purewater and CO2feed. At a higher current density (100 mA cm-2), CO selectivity decreases, but was still >30%, due to reversibleproduct inhibition. This study demonstrates the importance of developing acid-tolerant catalysts for use in large-scale CO2reductiondevices.
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