Abstract
Methanol is a desirable, value-added product from CO2 electroreduction, but is difficult to obtain in high Faradaic efficiencies. Promising results have emerged from a catalyst system comprised of cobalt pthalocyanine adsorbed onto carbon nanotubes (CoPc/CNT) in batch cell reactors, reaching Faradaic efficiencies of 40-50%.(1) In this talk, we will present our work on scaling this reaction in a 25 cm2 flow reactor with a gas diffusion electrode. We discuss the differences in the two geometries (electrolyzer vs. batch reactor) and the effect of different process conditions, such as pH, electrolyte identity and CO2 partial pressure on product selectivities. Y. Wu, Z. Jiang, X. Lu, Y. Liang, H. Wang, Nature. 575, 639–642 (2019).
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