Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 32, Issue 11, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202107301
Keywords
cobalt phthalocyanine; industrial-current CO; (2) electrolysis; membrane electrode assembly; molecularly dispersed catalysts
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Funding
- National Natural Science Funds for Distinguished Young Scholars [51725201]
- International (Regional) Cooperation and Exchange Projects of the National Natural Science Foundation of China [51920105003]
- Innovation Program of Shanghai Municipal Education Commission [E00014]
- National Natural Science Foundation of China [51902105]
- Shanghai Engineering Research Center of Hierarchical Nanomaterials [18DZ2252400]
- Shanghai Sailing Program [19YF1411600]
- Shanghai Rising-star Program [20QA1402400]
- Fundamental Research Funds for the Central Universities [JKD01211519, JKVJ1211022]
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The study presents a molecular catalyst for high-rate electrochemical CO2-to-CO conversion, exhibiting high CO selectivity at industrial current densities. The developed catalyst shows promising performance with potential for commercial-scale CO production.
High-rate electrochemical CO2-to-CO conversion provides a favorable strategy for carbon neutrality. Molecular catalysts, especially those with isolated metal active centers, are known to be the efficient CO2-to-CO electrocatalysts due to their high selectivity and outstanding instinct activity; however, the controllable scale-up synthesis and durable utilization at industrial current densities still remain a challenge. Here, it is developed a molecularly dispersed cobalt phthalocyanine loaded on carbon nanotube for high-current long-term CO2-to-CO electrolysis. The resultant catalyst exhibits a high CO selectivity with a maximum Faradaic efficiency of 97% and performs a current density of -200 mA cm(-2) in a flow cell with a TOF of 83.9 s(-1), which is among the best of CO-selective electrocatalysts. With a series of impregnation loading experiments, the process of molecular-dispersion or aggregation is investigated. In addition, the application of selective and durable electrolysis at a current of 0.25 A is realized up to 38.5 h in a scale-up MEA configuration. Subsequent characterization shows robust durability closely related to the dispersion of CoPc. This study provides a triumph to catalyze commercial-scale CO production using molecularly dispersed phthalocyanine electrocatalysts.
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