Electrochemical reduction of carbon dioxide on hydrogen-storing materials

Ohkawa, Kiyomi; Noguchi, Yasuhisa; Nakayama, Sumie; Hashimoto, Kazuhito; Fujishima, Akira

doi:10.1016/0022-0728(93)03011-d

Cited by 29 publications

(20 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was also reported that the HER can be suppressed on the Pd surface, and so the electrocatalytic activity can be enhanced. 136 Ohkawa et al 137,138 modified a Pd electrode surface for the electrochemical reduction of CO 2 in aqueous KHCO 3 solution. The current efficiencies for CH 3 OH, CH 4 and HCOOH production were larger on hydrogenated Cu-modified Pd electrodes than on non-hydrogenated electrodes.…”

Section: Other Transition Metalsmentioning

confidence: 99%

Towards the electrochemical conversion of carbon dioxide into methanol

et al. 2015

View full text Add to dashboard Cite

show abstract

Section: Other Transition Metalsmentioning

confidence: 99%

Towards the electrochemical conversion of carbon dioxide into methanol

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Electrocatalytic reduction of CO2 has been deeply studied in metal electrodes (Ag, In, Cu), gas diffusion (Ag, Pb, Pt, Cu, Ru−Pd, Ag) and in the presence of macrocyclic systems (porphyrins, phthalocyanines, tetrazamacrocycles, polypyridines) . In all cases high overpotentials are required to carry out the process, namely, between −1.0 and −2.5 V depending on experimental conditions (solvent, supporting electrolyte, temperature, pressure).…”

Section: Resultsmentioning

confidence: 99%

Electrochemical Conversion of Carbon Dioxide into CHO‐Containing Compounds on Multimetallic Porphyrins

et al. 2017

View full text Add to dashboard Cite

This work describes the electrochemical reduction of carbon dioxide in aqueous solution mediated by tetraruthenated metalloporphyrins (TRP; Co(II) and Zn(II)) in Nafion (Nf) and polyvinyl chloride (PVC) as a support. The comparative aspects of the two polymeric matrices are expressed in terms of the electrocatalytic behavior toward carbon dioxide reduction of both sets of modified electrodes; values of overpotential and turnover frequency were calculated in each case. The modified electrodes under survey were able to reduce carbon dioxide at −600 mV vs Ag/AgCl showing an enhanced reduction current and a decrease in the required overpotential compared to a bare glassy carbon (GC) electrode. Potential‐controlled electrolysis experiments were carried out at −1000 mV in order to compare the distribution of products. The production of formic acid, formaldehyde and methanol was confirmed at potentials where reduction of solvent may occur. Measurements of electrochemical impedance spectroscopy show the presence of one active site for GC/Nf/MTRP (where M=Zn(II) and Co(II)) and three for GC/PVC/MTRP. This information corroborates the high values of TOF obtained for GC/PVC/ZnTRP as the best electrocatalyst.

show abstract

“…A series of studies was carried out by Ohkawa et al using hydrogenated palladium electrodes with applied potentials of -1.60 to -1.80 V vs SHE [80][81][82][83]. Hydrogenation and addition of copper to the palladium electrode increased the current efficiency for the production of CO and formic acid as compared to the unmodified electrodes [80,81].…”

Section: Palladiummentioning

confidence: 99%

“…The remaining products of CO and formic acid were formed with efficiencies of about 20% and 60%, respectively. The copper deposition may have suppressed the formation of H 2 which allows the hydrogenation of the adsorbed intermediates thus allowing the formation of reduction products [82]. Kolbe et al showed that the reduction of CO 2 to CO or formic acid on palladium electrodes begins at about -1 V vs SHE accompanied by hydrogen evolution.…”

Section: Palladiummentioning

confidence: 99%