Solar-Driven Simultaneous Electrochemical CO 2 Reduction and Water Oxidation Using Perovskite Solar Cells

Jaehoon Chung, Nam Joong Jeon and Jun Hong Noh
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Jaehoon Chung: Department of Physics and Astronomy, and Wright Center for Photovoltaics Innovation and Commercialization (PVIC), University of Toledo, Toledo, OH 43606, USA
Nam Joong Jeon: Division of Advanced Materials, Korea Research Institute of Chemical Technology, Daejeon 305-600, Korea
Jun Hong Noh: School of Civil, Environmental and Architectural Engineering, Korea University, Seoul 02841, Korea

Energies, 2021, vol. 15, issue 1, 1-8

Abstract: The utilization of solar energy into electrochemical reduction systems has received considerable attention. Most of these attempts have been conducted in a single electrolyte without a membrane. Here, we report the system combined by the electrochemical CO 2 reduction on the Au dendrite electrode and the water oxidation on the Co-Pi electrode with a Nafion membrane. An efficient reduction of CO 2 to CO in the cathode using the proton from water oxidation in the anode is conducted using perovskite solar cells under 1 sun condition. The sustainable reaction condition is secured by balancing each reaction rate based on products analysis. Through this system, we collect reduction products such as CO and H 2 and oxidation product, O 2 , separately. Employing separation of each electrode system and series-connected perovskite solar cells, we achieve 8% of solar to fuel efficiency with 85% of CO selectivity under 1 sun illumination.

Keywords: solar to fuel; CO 2 reduction; water oxidation; electrochemical; perovskite (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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