Highly efficient electro-reduction of CO 2 to formic acid by nano-copper
Ultra-fine copper( ii ) oxide nanoparticles were used for the electrocatalytic reduction of CO 2 to formic acid at high Faradaic efficiencies. The nanoparticles were directly synthesised via continuous hydrothermal flow synthesis (CHFS) process, which used water as a solvent and reagent. The as-prep...
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| Published in | Journal of materials chemistry. A, Materials for energy and sustainability Vol. 4; no. 36; pp. 13786 - 13794 |
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| Main Authors | , , |
| Format | Journal Article |
| Language | English |
| Published |
2016
|
| Online Access | Get full text |
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| Summary: | Ultra-fine copper(
ii
) oxide nanoparticles were used for the electrocatalytic reduction of CO
2
to formic acid at high Faradaic efficiencies. The nanoparticles were directly synthesised
via
continuous hydrothermal flow synthesis (CHFS) process, which used water as a solvent and reagent. The as-prepared nanoparticles were subsequently formulated into Nafion based inks. For the electroreduction of CO
2
, the influence of Nafion fraction on the Faradaic efficiencies and overpotential (for formic acid production), was explored over a wide potential range. The highest Faradaic efficiency for formic acid production (61%) was observed with a 25 wt% Nafion fraction, at a potential of −1.4 V
vs.
Ag/AgCl. Some insights into the significant increase in Faradaic efficiency for the production of formic acid with the optimum Nafion content, was elucidated with electrochemical impedance spectroscopy. |
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| ISSN: | 2050-7488 2050-7496 |
| DOI: | 10.1039/C6TA04874A |