Electrochemical conversion of CO2 at metal-modified boron-doped diamond electrodes

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Abstract

Electrochemical reduction of CO2 dissolved in 0.1 M NaCl solution was investigated at boron-doped diamond (BDD) modified by various metals. Iridium, platinum, and copper were used as the modifying metals. The metals were deposited on the BDD surface by using chronoamperometry technique at each potential reduction of the metals, i.e. +0.6 V (vs. Ag/AgCl) for iridium, -0.2 V for platinum, and -0.4 V for copper. SEM images were used to characterize the modified electrodes. The electrochemical reduction of CO2 was performed in 100 mL 0.1 M NaCl containing saturated CO2 at the potential of -2.5 V (vs. Ag/AgCl). Characterization of the electrolysis results using GC and HPLC indicated that the products formed at the modified electrodes were the combination of electrochemical results at BDD and at the modifying metals. However, in addition to the combination products, formaldehyde (3.81 ppm) and acetate (22.5 ppm) were observed at copper-modified BDD, suggested a synergic effect occurred between BDD and copper.

Original languageEnglish
Title of host publicationProceedings of the 3rd International Symposium on Current Progress in Mathematics and Sciences 2017, ISCPMS 2017
EditorsRatna Yuniati, Terry Mart, Ivandini T. Anggraningrum, Djoko Triyono, Kiki A. Sugeng
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735417410
DOIs
Publication statusPublished - 22 Oct 2018
Event3rd International Symposium on Current Progress in Mathematics and Sciences 2017, ISCPMS 2017 - Bali, Indonesia
Duration: 26 Jul 201727 Jul 2017

Publication series

NameAIP Conference Proceedings
Volume2023
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference3rd International Symposium on Current Progress in Mathematics and Sciences 2017, ISCPMS 2017
CountryIndonesia
CityBali
Period26/07/1727/07/17

Keywords

  • CO conversion
  • boron-doped diamond
  • electrochemical reduction
  • hydrocarbon
  • metal modification

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  • Cite this

    Anggraningrum, I. T. (2018). Electrochemical conversion of CO2 at metal-modified boron-doped diamond electrodes. In R. Yuniati, T. Mart, I. T. Anggraningrum, D. Triyono, & K. A. Sugeng (Eds.), Proceedings of the 3rd International Symposium on Current Progress in Mathematics and Sciences 2017, ISCPMS 2017 [020102] (AIP Conference Proceedings; Vol. 2023). American Institute of Physics Inc.. https://doi.org/10.1063/1.5064099