Novel copper gas penetration electrode can efficiently reduce CO2 to multicarbon products

Novel copper gas penetration electrode can efficiently reduce CO2 to multicarbon products
Schematic illustration showing the general procedures for the fabrications of Cu HF and activated Cu HF. Credit: Energy & Environmental Science (2022). DOI: 10.1039/D2EE02121H

Electrochemical conversion of CO2 into value-added chemical fuels driven by renewable electrical energy is a prospective strategy for addressing both CO2 emissions and energy consumption. However, the current density of CO2 to multicarbon products remains a challenge for sustained industrial-scale implementation.

Recently, a research team from the Shanghai Advanced Research Institute of the Chinese Academy of Sciences reported a hierarchical micro/nanostructured Cu(100)-rich hollow-fiber gas penetration electrode (GPE) for electrochemical reduction of CO2 to multicarbon products under ampere level current density. The electrode broke through the bottleneck of low CO2 solubility limit.

The results were published in Energy & Environmental Science on Nov. 2.

The Cu GPE is composed only of metallic copper for electrochemical CO2 reduction reaction to C2+ products. It reduced CO2 to C2+ products with a faradaic efficiency of 62.8% and a of 2.3 A cm-2 in 0.5 M KHCO3 solution at -1.94 V, approximating to or even outperforming state-of-the-art Cu-based catalysts.

Electrochemical results showed that optimized and enhanced three-phase interface reaction synergistically promoted CO2 activation and reduction kinetics. Theoretical calculations further suggested that the Cu(100) facet of Cu GPE favored CO adsorption and dimerization, thus enhancing its catalytic activity.

More information: Chang Zhu et al, Ampere-level CO2 reduction to multicarbon products over a copper gas penetration electrode, Energy & Environmental Science (2022). DOI: 10.1039/D2EE02121H

Journal information: Energy & Environmental Science

Citation: Novel copper gas penetration electrode can efficiently reduce CO2 to multicarbon products (2022, November 8) retrieved 27 January 2023 from https://phys.org/news/2022-11-copper-gas-penetration-electrode-efficiently.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.

Explore further

Researchers propose novel method to enhance electrocatalytic conversion of carbon dioxide

27 shares

Feedback to editors