(17c) Novel Approach to Synthesize the Cu-Based Selective Electrocatalysts for CO2 Electroreduction | AIChE

(17c) Novel Approach to Synthesize the Cu-Based Selective Electrocatalysts for CO2 Electroreduction


Serov, A. - Presenter, University of New Mexico
Artyushkova, K. - Presenter, University of New Mexico
Atanassov, P. - Presenter, University of New Mexico

Novel Approach to Synthesize the Cu-based Selective Electrocatalysts for CO2 Electroreduction


Monica Padilla1, Alexey Serov1, Kateryna Artyushkova1, Olga A. Baturina2 and Plamen Atanassov1

1University of New Mexico, Albuquerque, NM 87131

2Naval Research Laboratory, Washington DC 20375

CO2 is a major green-house gas that can be used for production of useful value added products such as alcohols, methane or ethane [1]. Carbon dioxide can be electrochemically reduced to hydrocarbon fuels under ambient temperature and pressure. This technology currently in development stage and therefore it can benefit from knowledge obtained from research in the field of the proton exchange membrane fuel cell (PEMFC).  The design principles for CO2 systems (electrolyzers) are similar to those of PEMFCs or anion-exchange membrane fuel cells. Similar to the oxygen reduction reaction (ORR) in PEMFCs, the reaction at the cathode of a CO2 electrolyzer requires a carefully designed electrocatalyst. On the other side, it should be mentioned that contrary to the ORR, CO2 electroreduction reaction results in multiple reaction products that are generated both in liquid and gas phase. In order to make the CO2electroreduction systems viable and prevent cost-heavy separation of products step the catalysts selective to only one product should be designed, synthesized and scaled-up.

Here we report our results on synthetic method development – based on Sacrificial Support Method (SSM) for preparation of Cu-based materials [2-5]. The method of the evaluation of electrocatalytic activity of un-supported Cu catalysts for the CO2 electroreduction reaction was based on the rotating disk electrode (RDE) technique and online gas chromatography (GC). The sealed RDE cell was specially designed and it was demonstrated that the reaction products generated on small surface area thin RDE films can be quantified by online GC. Liquid reaction products are separated and identified ex-situ  by liquid chromatography or NMR.

               It was shown that controlling the SSM parameters it was possible to synthesize the Cu-based electrocatalyst with selectivity to C2products close to 90%.


OAB is grateful to the Office of Naval Research for financial support of this project.


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