Nanoporous Cu/Ni oxide composites: efficient catalysts for electrochemical reduction of CO2in aqueous electrolytes

Novel Pd/Co–Ni oxide composites were developed as electrocatalysts for formic acid electro-oxidation as a process that can be utilised in fuel cells and electrochemical sensors.

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Photochemical and Electrochemical Reduction of Carbon Dioxide Catalyzed by a Polyoxometalate-Organic Photosensitizer Complex

10.26434/chemrxiv.7177892 ◽

2018 ◽

Author(s):

Chandan Dey ◽

Ronny Neumann

Keyword(s):

Carbon Dioxide ◽

Cyclic Voltammetry ◽

Formic Acid ◽

Electrochemical Reduction ◽

Mass Spectroscopy ◽

Photochemical Reactions ◽

Reducing Agent ◽

Covalent Attachment ◽

Hybrid Complex ◽

Open Face

A manganese substituted Anderson type polyoxometalate, [MnMo6O24]9-, tethered with an anthracene photosensitizer was prepared and used as catalyst for CO2 reduction. The polyoxometalate-photosensitizer hybrid complex, obtained by covalent attachment of the sensitizer to only one face of the planar polyoxometalate, was characterized by NMR, IR and mass spectroscopy. Cyclic voltammetry measurements show a catalytic response for the reduction of carbon dioxide, thereby suggesting catalysis at the manganese site on the open face of the polyoxometalate. Controlled potentiometric electrolysis showed the reduction of CO2 to CO with a TOF of ~15 sec-1. Further photochemical reactions showed that the polyoxometalate-anthracene hybrid complex was active for the reduction of CO2 to yield formic acid and/or CO in varying amounts dependent on the reducing agent used. Control experiments showed that the attachment of the photosensitizer to [MnMo6O24]9- is necessary for photocatalysis.<div> </div>

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Square-Wave Voltammetry of Decamethylferrocene at the Three-Phase Junction Organic Liquid/Aqueous Solution/Graphite

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc20010434 ◽

2001 ◽

Vol 66 (3) ◽

pp. 434-444 ◽

Cited By ~ 24

Author(s):

Šebojka Komorsky-Lovrić ◽

Milivoj Lovrić ◽

Fritz Scholz

Keyword(s):

Aqueous Solution ◽

Linear Relationship ◽

Square Wave Voltammetry ◽

Aqueous Electrolyte ◽

Graphite Electrode ◽

Organic Liquid ◽

Aqueous Electrolytes ◽

Square Wave ◽

Wave Voltammetry ◽

Three Phase

Drops of nitrobenzene and 1,2-dichloroethane with 0.1 M decamethylferrocene (dmfc) are attached to the surface of a paraffin-impregnated graphite electrode and immersed into various aqueous electrolytes. The oxidation of dmfc and the reduction of dmfc+ cation are enabled by simultaneous transfers of anions between the aqueous electrolyte and the organic solvents. Square-wave voltammetry of this reaction is reported. A linear relationship was observed between the peak potentials of dmfc and the standard Galvani potential differences of the anions. The influence of the anion concentration on this relation is explained.

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CO2 reduction to formic acid at low overpotential on BDD electrodes modified with nanostructured CeO2

Journal of Materials Chemistry A ◽

10.1039/c9ta01000a ◽

2019 ◽

Vol 7 (30) ◽

pp. 17896-17905 ◽

Cited By ~ 3

Author(s):

Enrico Verlato ◽

Simona Barison ◽

Yasuaki Einaga ◽

Stefano Fasolin ◽

Marco Musiani ◽

...

Keyword(s):

Formic Acid ◽

Co2 Reduction ◽

Faradaic Efficiency ◽

Low Overpotential

Nanostructured CeO2/BDD electrodes produce formic acid with good faradaic efficiency at very low overpotential (>40% at η ≈ 40 mV).

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A GaN:Sn nanoarchitecture integrated on a silicon platform for converting CO2 to HCOOH by photoelectrocatalysis

Energy & Environmental Science ◽

10.1039/c9ee01339c ◽

2019 ◽

Vol 12 (9) ◽

pp. 2842-2848 ◽

Cited By ~ 14

Author(s):

Baowen Zhou ◽

Xianghua Kong ◽

Srinivas Vanka ◽

Shaobo Cheng ◽

Nick Pant ◽

...

Keyword(s):

Formic Acid ◽

High Efficiency ◽

Reaction Path ◽

Planar Silicon ◽

Low Overpotential ◽

Favorable Reaction

A unique GaN:Sn nanoarchitecture is integrated on planar silicon to demonstrate an energetically favorable reaction path for aqueous photoelectrochemical CO2 reduction towards formic acid with high efficiency at low overpotential.

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