TY - JOUR
T1 - Improving the CO2 electrochemical reduction to formic acid using iridium-oxide-modified boron-doped diamond electrodes
AU - Jiwanti, Prastika K.
AU - Ichzan, Andi M.
AU - Dewandaru, Respati K.P.
AU - Atriardi, Shafrizal R.
AU - Einaga, Yasuaki
AU - Ivandini, Tribidasari A.
N1 - Funding Information:
This research was funded by the Indonesian Ministry of Research, Technology and Higher Education under Hibah PUPT Kemenristek Dikti 2019, Contract No. NKB-1715/UN2.R3.1/HKP.05.00/2019 .
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/6
Y1 - 2020/6
N2 - Modification of iridium on the surface of boron-doped diamond (BDD) electrode has been performed to decrease the overpotential reduction of carbon dioxide (CO2) and produce value-added carbon compounds. The modification was performed using the cyclic voltammetry (CV) technique that successfully deposited iridium oxide on the surface of the BDD electrode with an Ir-to-C ratio of approximately 1:100. When the modified BDD electrode was utilized for CV of a dissolved-CO2-saturated solution, hydrogen evolution occurred at a potential of approximately −1.2 V (vs. Ag/AgCl), which was lower than that when an unmodified BDD was used. Furthermore, when this electrode was utilized for amperometry of the same solution at −1.7 V for 1 h, formic acid (HCOOH) was produced with a Faradaic efficiency of approximately 50%. Results indicated that the modified electrode has considerable potential for application to CO2 electrochemical reduction.
AB - Modification of iridium on the surface of boron-doped diamond (BDD) electrode has been performed to decrease the overpotential reduction of carbon dioxide (CO2) and produce value-added carbon compounds. The modification was performed using the cyclic voltammetry (CV) technique that successfully deposited iridium oxide on the surface of the BDD electrode with an Ir-to-C ratio of approximately 1:100. When the modified BDD electrode was utilized for CV of a dissolved-CO2-saturated solution, hydrogen evolution occurred at a potential of approximately −1.2 V (vs. Ag/AgCl), which was lower than that when an unmodified BDD was used. Furthermore, when this electrode was utilized for amperometry of the same solution at −1.7 V for 1 h, formic acid (HCOOH) was produced with a Faradaic efficiency of approximately 50%. Results indicated that the modified electrode has considerable potential for application to CO2 electrochemical reduction.
KW - Boron-doped diamond
KW - CO electrochemical reduction
KW - Formate
KW - Iridium oxide
UR - http://www.scopus.com/inward/record.url?scp=85083426623&partnerID=8YFLogxK
U2 - 10.1016/j.diamond.2020.107874
DO - 10.1016/j.diamond.2020.107874
M3 - Article
AN - SCOPUS:85083426623
SN - 0925-9635
VL - 106
JO - Diamond and Related Materials
JF - Diamond and Related Materials
M1 - 107874
ER -