Electroreduction of Carbon Dioxide to Carbon Monoxide by Co-pthalocyanine Electrocatalyst under Ambient Conditions

Yamanaka, Ichiro; Tabata, Kyosuke; Mino, Wataru; Furusawa, Takeshi

doi:10.2355/isijinternational.55.399

Cited by 16 publications

(17 citation statements)

References 18 publications

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“…CO 2 ‐reduction devices based on MEAs are considered to be among the few practical and feasible options for realizing deployable large‐scale CO 2 ‐remediation apparatus . Figure displays the total‐current and CO‐production‐current densities in the two‐electrode device.…”

Section: Resultsmentioning

confidence: 99%

Polyethylenimine‐assisted Synthesis of Au Nanoparticles for Efficient Syngas Production

Chung

et al. 2019

Electroanalysis

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The ability to capture, store, and use CO2 is important for remediating greenhouse‐gas emissions and combatting global warming. Herein, Au nanoparticles (Au‐NPs) are synthesized for effective electrochemical CO2 reduction and syngas production, using polyethylenimine (PEI) as a ligand molecule. The PEI‐assisted synthesis provides uniformly sized 3‐nm Au NPs, whereas larger irregularly shaped NPs are formed in the absence of PEI in the synthesis solution. The Au‐NPs synthesized with PEI (PEI−Au/C, average PEI Mw=2000) exhibit improved CO2 reduction activities compared to Au‐NPs formed in the absence of PEI (bare Au NPs/C). PEI−Au/C displays a 34 % higher activity toward CO2 reduction than bare Au NPs/C; for example, PEI−Au/C exhibits a CO partial current density (jCO) of 28.6 mA cm−2 at −1.13 VRHE, while the value for bare Au NPs/C is 21.7 mA cm−2; the enhanced jCO is mainly due to the larger surface area of PEI−Au/C. Furthermore, the PEI−Au/C electrode exhibits stable performance over 64 h, with an hourly current degradation rate of 0.25 %. The developed PEI−Au/C is employed in a CO2‐reduction device coupled with an IrO2 water‐oxidation catalyst and a proton‐conducting perfluorinated membrane to form a PEI−Au/C|Nafion|IrO2 membrane‐electrode assembly. The device using PEI−Au/C as the CO2‐reduction catalyst exhibits a jCO of 4.47 mA/cm2 at 2.0 Vcell. Importantly, the resulted PEI−Au/C is appropriate for efficient syngas production with a CO ratio of around 30–50 %.

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Section: Resultsmentioning

confidence: 99%

Polyethylenimine‐assisted Synthesis of Au Nanoparticles for Efficient Syngas Production

Chung

et al. 2019

Electroanalysis

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“…Figure 1 shows the gas-electrolysis cell for CO 2 reduction. [14][15][16] Pure H 2 gas (20 mL min − 1 ) and pure CO 2 gas (10 mL min − 1 ) were introduced into the anode and cathode compartments, respectively. In addition, to humidify the Nafion membrane, a 0.5 mL of deionized water was introduced in the cell and H 2 bubbled through deionized water.…”

Section: Mea Fabricationmentioning

confidence: 99%

“…Recently, we reported the selective reduction of CO 2 to CO by the Co-N-C electrocatalyst in the PEM reactor. [14][15][16] In the previous work, the Co-N-C electrocatalyst was prepared by partial pyrolysis of Co(dmbpy) 3 (dmbpy = 4,4'-dimethyl-2,2'-bipyridine) complex supported on carbon materials (c.a. KETJENBLACK) in inert gas (He) at 673 K, as abbreviated Co-dmbpy/KB(673K).…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic Reduction of CO<sub>2</sub> to CO and CH<sub>4</sub> by Co–N–C Catalyst and Ni co-catalyst with PEM Reactor

2019

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Utilization of renewable energy has been proposed for solution of the Global Warming. Electroreduction of CO 2 into valuable chemicals using renewable electricity is a promising technology. Electroreduction of CO 2 to CO and CH 4 was studied using the polymer-electrolyte-membrane (PEM) gas cell. The electrocatalyst prepared by partial pyrolysis of Co-4,4'-dimethyl-2,2'-bipyridine supported on KEJENBLACK at 673 K (Co-dmbpy/KB(673K)) has been found for selective reduction of CO 2 to CO. Screening of co-catalysts to promote formation of CH 4 during the CO 2 reduction by the Co-dmbpy/KB(673K) cathode was conducted in this work. An effective Ni/KB co-catalyst prepared by H 2 reduction at 673 K was found. Suitable preparation conditions and methods of the cathode and effects of cathode potentials on the CO 2 reduction to CO and CH 4 were studied. The reaction path for the formation of CH 4 in the CO 2 reduction was studied and the successive reduction of CO 2 to CO on the Co-dmbpy/KB(673K) catalyst and CO to CH 4 on the Ni/ KB(673K) co-catalyst was determined.

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“…Alternatively, low-temperature electrolyzers containing protonic exchange membranes (PEM) have been proposed to directly transform CO 2 into hydrocarbons and oxygenates [11][12][13]. Despite the overall single-pass conversions being typically low in these reactors, the unreacted CO 2 can be easily separated from the liquid fuels and recycled again to the reactor.…”

Section: Introductionmentioning

confidence: 99%

Low-Temperature Electrocatalytic Conversion of CO2 to Liquid Fuels: Effect of the Cu Particle Size

et al. 2018

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A novel gas-phase electrocatalytic system based on a low-temperature proton exchange membrane (Sterion) was developed for the gas-phase electrocatalytic conversion of CO 2 to liquid fuels. This system achieved gas-phase electrocatalytic reduction of CO 2 at low temperatures (below 90 • C) over a Cu cathode by using water electrolysis-derived protons generated in-situ on an IrO 2 anode. Three Cu-based cathodes with varying metal particle sizes were prepared by supporting this metal on an activated carbon at three loadings (50, 20, and 10 wt %; 50% Cu-AC, 20% Cu-AC, and 10% Cu-AC, respectively). The cathodes were characterized by N 2 adsorption-desorption, temperature-programmed reduction (TPR), and X-ray diffraction (XRD) and their performance towards the electrocatalytic conversion of CO 2 was subsequently studied. The membrane electrode assembly (MEA) containing the cathode with the largest Cu particle size (50% Cu-AC, 40 nm) showed the highest CO 2 electrocatalytic activity per mole of Cu, with methyl formate being the main product. This higher electrocatalytic activity was attributed to the lower Cu-CO bonding strength over large Cu particles. Different product distributions were obtained over 20% Cu-AC and 10% Cu-AC, with acetaldehyde and methanol being the main reaction products, respectively. The CO 2 consumption rate increased with the applied current and reaction temperature.

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Electroreduction of Carbon Dioxide to Carbon Monoxide by Co-pthalocyanine Electrocatalyst under Ambient Conditions

Cited by 16 publications

References 18 publications

Polyethylenimine‐assisted Synthesis of Au Nanoparticles for Efficient Syngas Production

Polyethylenimine‐assisted Synthesis of Au Nanoparticles for Efficient Syngas Production

Electrocatalytic Reduction of CO<sub>2</sub> to CO and CH<sub>4</sub> by Co–N–C Catalyst and Ni co-catalyst with PEM Reactor

Low-Temperature Electrocatalytic Conversion of CO2 to Liquid Fuels: Effect of the Cu Particle Size

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