Electrochemical CO2 Reduction on Metal Electrodes

Hori, Yasuhiko

doi:10.1007/978-0-387-49489-0_3

Cited by 1,722 publications

(1,844 citation statements)

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“…relative to the standard CO-to-C 2 H 5 OH reduction potential [12], and lower by 645 mV than for the production of hydrocarbons like CH 4 or C 2 H 4 [13,14]. We observed that an atomically ordered Cu(100) surface did not produce ethanol.…”

Section: Accepted M Manuscriptmentioning

confidence: 59%

Surface reconstruction of pure-Cu single-crystal electrodes under CO-reduction potentials in alkaline solutions: A study by seriatim ECSTM-DEMS

Kim

Javier

Baricuatro

et al. 2016

Journal of Electroanalytical Chemistry

108

119

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Section: Accepted M Manuscriptmentioning

confidence: 59%

Surface reconstruction of pure-Cu single-crystal electrodes under CO-reduction potentials in alkaline solutions: A study by seriatim ECSTM-DEMS

Kim

Javier

Baricuatro

et al. 2016

Journal of Electroanalytical Chemistry

108

119

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“…. The reason that HCO 3 − anions are an effective source of absorbed H* is that the pK a of HCO 3 − anions is 3.7 pK a units lower than that of water (10.3 vs 14), which means that despite the lower concentration of HCO 3 − anions (0.1 M) relative to that of water (55 M), HCO 3 − anions can compete with water as a source of H*. 15 The difference between the total current density and the observed H 2 partial current density was calculated to determine the scan rate dependence of the quantification error, as shown in Figure 2B.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Direct Observation of the Local Reaction Environment during the Electrochemical Reduction of CO₂

2018

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ABSTRACT:The electrochemical reduction of carbon dioxide is sensitive to electrolyte polarization, which causes gradients in pH and the concentration of carbon dioxide to form near the cathode surface. It is desirable to measure the concentration of reaction-relevant species in the immediate vicinity of the cathode because the intrinsic kinetics of carbon dioxide reduction depend on the composition of the local reaction environment. Meeting this objective has proven difficult because conventional analytical methods only sample products from the bulk electrolyte. In this study, we describe the use of differential electrochemical mass spectrometry to measure the concentration of carbon dioxide and reaction products in the immediate vicinity of the cathode surface. This capability is achieved by coating the electrocatalyst directly onto the pervaporation membrane used to transfer volatile species into the mass spectrometer, thereby enabling species to be sampled directly from the electrode−electrolyte interface. This approach has been used to investigate hydrogen evolution and carbon dioxide reduction over Ag and Cu. We find that the measured CO 2 reduction activity of Ag agrees well with what is measured by gas chromatography of the effluent from an H-cell operated with the same catalyst and electrolyte. A distinct advantage of our approach is that it enables observation of the depletion of carbon dioxide near the cathode surface due to reaction with hydroxyl anions evolved at the cathode surface, something that cannot be done using conventional analytical techniques. We also demonstrate that the influence of this relatively slow chemical reaction can be minimized by evaluating electrocatalytic activity during a rapid potential sweep, thereby enabling measurement of the intrinsic kinetics. For CO 2 reduction over Cu, nine products can be observed simultaneously in real time. A notable finding is that the abundance of aldehydes relative to alcohols near the cathode surface is much higher than that observed in the bulk electrolyte. It is also observed that for increasingly cathodic potentials the relative abundance of ethanol increases at the expense of propionaldehyde. These findings suggest that acetaldehyde is a precursor to ethanol and propionaldehyde and that propionaldehyde is a precursor to n-propanol.

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“…The production of hydrocarbons and liquid fuels from electrochemical reduction of CO 2 has been the subject of various investigations because CO 2 is the huge and sustainable carbon feedstock and its conversion into hydrocarbons and liquid fuels could provide an incentive for the CO 2 capture (35,36). However, efficient and durable electrocatalysts for the electroreduction of CO 2 and its derivatives into desirable fuels are not available at the present (37)(38)(39).…”

Section: Introductionmentioning

confidence: 99%

RETRACTED ARTICLE: An overview of CO₂ electroreduction into hydrocarbons and liquid fuels on nanostructured copper catalysts

Abbas

Ullah

Ali

et al. 2016

Green Chemistry Letters and Reviews

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The increasing atmospheric levels of carbon dioxide (CO 2 ) must be controlled or better reverted to avoid undesirable climate changes. The electrochemical reduction of CO 2 into hydrocarbons is the best approach to solve this problem because it will recycle the 'spent' CO 2 , known as carbon neutral cycle, and will probably be able to remit the energy crises. Nanostructured copper is a novel material known for the efficient and selective reduction of CO 2 into hydrocarbons. This review attempts to summarize the recent development of enlarged surface area nanostructured copper for the efficient reduction of CO 2 into hydrocarbons using renewable energy resources at low overpotentials. The effects of different reaction conditions (e.g. applied potential, CO 2 concentration and electrode surface) on the products and some relationships between these conditions and products are discussed here. Latest achievements in the CO 2 electroreduction technology, remaining challenges and perspective research directions for practical applications are also presented. ARTICLE HISTORY

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Electrochemical CO2 Reduction on Metal Electrodes

Cited by 1,722 publications

References 1 publication

Surface reconstruction of pure-Cu single-crystal electrodes under CO-reduction potentials in alkaline solutions: A study by seriatim ECSTM-DEMS

Surface reconstruction of pure-Cu single-crystal electrodes under CO-reduction potentials in alkaline solutions: A study by seriatim ECSTM-DEMS

Direct Observation of the Local Reaction Environment during the Electrochemical Reduction of CO₂

RETRACTED ARTICLE: An overview of CO₂ electroreduction into hydrocarbons and liquid fuels on nanostructured copper catalysts

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Electrochemical CO2 Reduction on Metal Electrodes

Cited by 1,722 publications

References 1 publication

Surface reconstruction of pure-Cu single-crystal electrodes under CO-reduction potentials in alkaline solutions: A study by seriatim ECSTM-DEMS

Surface reconstruction of pure-Cu single-crystal electrodes under CO-reduction potentials in alkaline solutions: A study by seriatim ECSTM-DEMS

Direct Observation of the Local Reaction Environment during the Electrochemical Reduction of CO2

RETRACTED ARTICLE: An overview of CO2 electroreduction into hydrocarbons and liquid fuels on nanostructured copper catalysts

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Product

Resources

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Direct Observation of the Local Reaction Environment during the Electrochemical Reduction of CO₂

RETRACTED ARTICLE: An overview of CO₂ electroreduction into hydrocarbons and liquid fuels on nanostructured copper catalysts