Electrochemical reduction of formic acid through its decarbonylation in phosphoric acid solution

Schizodimou, Agoritsa; Kotoulas, I.; Kyriacou, G.

doi:10.1016/j.electacta.2016.05.163

Cited by 9 publications

(9 citation statements)

References 18 publications

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“…The results showed that reduction products such as MeOH and HCOOMe were not detected. Thus, the mechanism on the chromium cathode was different from that observed on Cu in a previous work, where the products were formed through the reduction of CO. In addition, acetic acid, which was the main impurity of FA (0.5%), was also not reduced under these conditions.…”

Section: Resultscontrasting

confidence: 65%

“…If only electrochemical parameters are taken into account, the effective current density at -0.95 V was 13 mA cm −2 , which was about 23 times higher than that reported in Ref. 10. In addition, HCOOMe, which was the main product of the reduction, can easily be separated from the reaction mixture due to its volatility.…”

Section: Mechanismmentioning

confidence: 60%

“…Details regarding the analytical setup have been given elsewhere . The gas chromatography (GC) analysis was performed every 15 min and a total of six measurements were taken during the electrolysis for each product.…”

Section: Methodsmentioning

confidence: 99%

“…Details regarding the analytical setup have been given elsewhere. 10 The gas chromatography (GC) analysis was performed every 15 min and a total of six measurements were taken during the electrolysis for each product. The presence of high molecular mass hydrocarbons (>C 6 ) was tested by extraction of the solution with pentane and analysis by gas chromatography-mass spectrometry (GC-MS) using an Agilent DB-1, 15 m × 0.25 mm I.D., 0.25 μm column.…”

Section: Methodsmentioning

confidence: 99%

“…8 In previous work in our laboratory it was shown that FA can be converted to MeOH and acetaldehyde on a Cu(88)Sn(6)Pb (6) cathode by %CEs of 30.3 and 37.6%, respectively, at -0.8 V vs Ag/AgCl. 9 In 85% H 3 PO 4 solution at 70 0 C on a copper cathode 10 the main products were MeOH (27.6%), acetaldehyde (25.8%) and the corresponding methyl esters of formic and phosphoric acids. Under these conditions FA is decomposed to carbon monoxide and water.…”

Section: Introductionmentioning

confidence: 99%

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Conversion of carbon dioxide to methanol through the reduction of formic acid on chromium

Kotoulas

Kyriacou

2017

J. Chem. Technol. Biotechnol

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BACKGROUND Formic acid (FA) can be produced from CO2 by high rate and high percentage current efficiency (%CE) which exceeds 90% on some metals. This work aims at the electrochemical conversion of formic acid to methanol (MeOH) by a two‐ step process including the conversion of CO2 to formic acid in the first and the reduction of formic acid to MeOH in the second. RESULTS The main products of the electrochemical reduction of FA in 85% H3PO4, at 80°C on chromium were methyl formate (HCOOMe), MeOH and CH4. The rate of the reduction increased both by increasing the negative potential and the concentration of FA. The total %CE in all experiments exceeded 100% and this was attributed to the cathodic dissolution of chromium which provided an additional reduction capacity. The selectivity to MeOH and HCOOMe was between 89 and 98% and the highest current density was 13 mA cm−2, at –0.95 V. CONCLUSIONS FA is selectively reduced to MeOH and its secondary product HCOOMe on a Cr cathode. The experimental results showed that chromium is the most efficient cathode for the reduction of FA. © 2016 Society of Chemical Industry

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Section: Resultscontrasting

confidence: 65%

Section: Mechanismmentioning

confidence: 60%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%