PHOTOELECTROCATALYTIC CONVERSION OF CO2 INTO VALUE-ADDED ORGANIC COMPOUNDS USING CU2O PHOTOCATHODE

Authors

  • Pattranit Thongthep
  • Chatchai Ponchio

Keywords:

Photoelectrocatalytic cell, CO2 reduction, Organic compounds, Cu2O, Electrodeposition

Abstract

The global warming from CO2 emission effect and finding renewable energy are two major
issues in today’s environmental and energy problems. The conversion of CO2 into value-added chemicals to
achieve an energy-saving and low-carbon economy is needed to be developed. Photoelectrocatalytic
technology is one of the most alternative ways to reduce CO2 under the advantage of high efficiency and
inexpensive resembles the artificial photosynthesis process. This research focuses on photoeletrocatalytic
reducing CO2 solution into organic compounds at a Cu2O photocathode. The Cu2O electrode fabrication was
developed by electrochemical deposition method to enhance the catalytic activity of reduction reaction under
visible light irradiation. The effects of light intensity, apply potential, pH and catalytic mechanism parameters
were studied to enhance the CO2 conversion to organic compounds efficiency. Carbonyl and methanol
compounds were produced at the applied potential of 0.2 V and -0.4 V (vs. Ag/AgCl), respectively with the
suitable pH in a solution of carbonate under visible light irradiation. These results illustrate that an applying
potential and pH adjustment are the key factors of organic compounds production. This developed
photoelectrocatalytic cell shows that the interesting method for reducing CO2 from air pollutant and also
producing value-added chemicals for alternative energy supplies.

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Published

2017-09-15

How to Cite

Pattranit Thongthep, & Chatchai Ponchio. (2017). PHOTOELECTROCATALYTIC CONVERSION OF CO2 INTO VALUE-ADDED ORGANIC COMPOUNDS USING CU2O PHOTOCATHODE. GEOMATE Journal, 14(46), 70–75. Retrieved from https://geomatejournal.com/geomate/article/view/2880

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Articles