Solar‐Driven Simultaneous Electrochemical CO2 Reduction and Water Oxidation Using Perovskite Solar Cells

Jaehoon Chung, Nam Joong Jeon, Jun Hong Noh

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


The utilization of solar energy into electrochemical reduction systems has received con-siderable attention. Most of these attempts have been conducted in a single electrolyte without a membrane. Here, we report the system combined by the electrochemical CO2 reduction on the Au dendrite electrode and the water oxidation on the Co‐Pi electrode with a Nafion membrane. An efficient reduction of CO2 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 col-lect reduction products such as CO and H2 and oxidation product, O2, 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.

Original languageEnglish
Article number270
Issue number1
Publication statusPublished - 2022 Jan 1

Bibliographical note

Funding Information:
Funding: This research was supported by a grant from the Korea Research Institute of Chemical Technology (KRICT)(SS2122‐20).

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.


  • CO reduction
  • Electrochemical
  • Perovskite
  • Solar to fuel
  • Water oxidation

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Energy (miscellaneous)
  • Control and Optimization
  • Electrical and Electronic Engineering


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