Relationship between hydrocarbon production in the electrochemical reduction of CO2 and the characteristics of the Cu electrode

Terunuma, Y.; Saitoh, A.; Momose, Yoshihiro

doi:10.1016/s0022-0728(97)00122-8

Cited by 52 publications

(48 citation statements)

References 22 publications

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“…17 To illustrate Surface preparation methods can also introduce additional variations in activity and selectivity between samples of the same metal due to the impact that these pretreatments have on 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 the purity and distribution of facets at the electrode surface. 19,20 Mechanical polishing can introduce contaminants onto the catalyst surface from the polish residue (see SI-3). These polish residues can be susceptible to electrochemical reduction under the conditions of CO 2 reduction and may exhibit background activity in the metallic state, as is the case for alumina-based polishing compounds.…”

Section: Benchmarking Electrocatalytic Performancementioning

confidence: 99%

Standards and Protocols for Data Acquisition and Reporting for Studies of the Electrochemical Reduction of Carbon Dioxide

et al. 2018

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Objective evaluation of the performance of electrocatalysts for CO 2 reduction has been complicated by a lack of standardized methods for measuring and reporting activity data. In this perspective, we advocate that standardizing these practices can aid in advancing research efforts toward the development of efficient and selective CO 2 reduction electrocatalysts. Using information taken from experimental studies, we identify variables that influence the measured performance of CO 2 reduction electrocatalysts and propose procedures to improve the accuracy and reproducibility of reported data. We recommend that catalysts be measured under conditions which do not introduce artifacts from impurities, either from the electrolyte or counter electrode, and advocate the acquisition of data measured in the absence of mass transport effects.Furthermore, measured rates of electrochemical reactions should be normalized to both the geometric electrode area as well as the electrochemically active surface area to facilitate the comparison of reported catalysts with those previously known. We demonstrate that when these factors are accounted for, the CO 2 reduction activity of Ag and Cu measured in different laboratories exhibit little difference. Adoption of the recommendations presented in this perspective would greatly facilitate the identification of superior catalysts for CO 2 reduction arising solely from changes in their composition and pretreatment.

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Section: Benchmarking Electrocatalytic Performancementioning

confidence: 99%

Standards and Protocols for Data Acquisition and Reporting for Studies of the Electrochemical Reduction of Carbon Dioxide

et al. 2018

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“…Copper and copper oxides [11][12][13][14][15][16][17][18][19] are the most known widely known p-type semiconductor used for CO 2 reduction, but these suffer from a lack of stability. From this some groups have presented the combination of metals and oxides for robust materials.…”

Section: Introductionmentioning

confidence: 99%

A New Si/TiO2/Pt p-n Junction Semiconductor to Demonstrate Photoelectrochemical CO2 Conversion

Guaraldo

Brito

Wood

et al. 2015

Electrochimica Acta

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“…The electrochemical reduction of CO 2 at metal electrodes in aqueous solution yields CO, HCOO , CH 4 , C 2 H 4 and alcohols in addition to H 2 , 1 and Cu metal is the only electrocatalyst capable of effectively producing hydrocarbons such as CH 4 and C 2 H 4 .…”

Section: Introductionmentioning

confidence: 99%

“…4 Little is known about how the surface composition of metallic Cu and its oxides and the electronic nature of the metal surface are responsible for the selectivity of the products and the reduction mechanism. Recently a very sensitive technique termed temperature-programmed photoelectron emission (TPPE) has been developed for monitoring metal surfaces used in practice.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical reduction of CO₂ at copper electrodes and its relationship to the metal surface characteristics

Momose¹,

Sheng²,

Ohno³

2002

Surface & Interface Analysis

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The selectivity of H 2 , CO, CH 4 and C 2 H 4 produced during the electrolysis of CO 2 in aqueous solution at copper electrodes has been investigated in relation to surface analysis of the electrodes after electrolysis by XPS and temperature-programmed photoelectron emission (TPPE) and surface potential (SP) measurements. The electrodes were prepared as follows: (A) only ultrasonic cleaning in acetone; (B) oxidation in air; (C) exposure to argon plasma. The electrolysis time was 3 h at a given potential. With electrode A, on increasing the potential in a negative direction the amount of CH 4 increased, accompanied by a decrease in the amounts of H 2 and CO, and the SP value was positive and shifted in a more positive direction, the TPPE activity increased and in the O1s XPS spectra a peak assigned to adsorbed oxygen developed. The amount of C 2 H 4 was greater in the potential range where both metallic Cu and Cu 2 O existed. With electrode B, the main product was H 2 , the SP value was negative, the TPPE activity was much smaller and Cu 2 O existed more preferentially than metallic Cu. With electrode C, the surface underwent oxidation easily when immersed in solution. With increasing plasma treatment time the hydrocarbon products decreased, the SP value was lower and the TPPE activity was smaller. It is suggested that the adsorbed oxygen present at the electrode surfaces can lead to an increase in the number of electrons available at the surfaces and also contribute to the adsorption of CO 2 , resulting in hydrocarbon production.

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Relationship between hydrocarbon production in the electrochemical reduction of CO2 and the characteristics of the Cu electrode

Cited by 52 publications

References 22 publications

Standards and Protocols for Data Acquisition and Reporting for Studies of the Electrochemical Reduction of Carbon Dioxide

Standards and Protocols for Data Acquisition and Reporting for Studies of the Electrochemical Reduction of Carbon Dioxide

A New Si/TiO2/Pt p-n Junction Semiconductor to Demonstrate Photoelectrochemical CO2 Conversion

Electrochemical reduction of CO₂ at copper electrodes and its relationship to the metal surface characteristics

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Relationship between hydrocarbon production in the electrochemical reduction of CO2 and the characteristics of the Cu electrode

Cited by 52 publications

References 22 publications

Standards and Protocols for Data Acquisition and Reporting for Studies of the Electrochemical Reduction of Carbon Dioxide

Standards and Protocols for Data Acquisition and Reporting for Studies of the Electrochemical Reduction of Carbon Dioxide

A New Si/TiO2/Pt p-n Junction Semiconductor to Demonstrate Photoelectrochemical CO2 Conversion

Electrochemical reduction of CO2 at copper electrodes and its relationship to the metal surface characteristics

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Electrochemical reduction of CO₂ at copper electrodes and its relationship to the metal surface characteristics