Low-cost high-efficiency system for solar-driven conversion of CO2 to hydrocarbons.

Abstract:

:Conversion of carbon dioxide into hydrocarbons using solar energy is an attractive strategy for storing such a renewable source of energy into the form of chemical energy (a fuel). This can be achieved in a system coupling a photovoltaic (PV) cell to an electrochemical cell (EC) for CO2 reduction. To be beneficial and applicable, such a system should use low-cost and easily processable photovoltaic cells and display minimal energy losses associated with the catalysts at the anode and cathode and with the electrolyzer device. In this work, we have considered all of these parameters altogether to set up a reference PV-EC system for CO2 reduction to hydrocarbons. By using the same original and efficient Cu-based catalysts at both electrodes of the electrolyzer, and by minimizing all possible energy losses associated with the electrolyzer device, we have achieved CO2 reduction to ethylene and ethane with a 21% energy efficiency. Coupled with a state-of-the-art, low-cost perovskite photovoltaic minimodule, this system reaches a 2.3% solar-to-hydrocarbon efficiency, setting a benchmark for an inexpensive all-earth-abundant PV-EC system.

authors

Huan TN,Dalla Corte DA,Lamaison S,Karapinar D,Lutz L,Menguy N,Foldyna M,Turren-Cruz SH,Hagfeldt A,Bella F,Fontecave M,Mougel V

doi

10.1073/pnas.1815412116

subject

Has Abstract

pub_date

2019-05-14 00:00:00

pages

9735-9740

issue

20

eissn

0027-8424

issn

1091-6490

pii

1815412116

journal_volume

116

pub_type

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