Electroreduction of carbon dioxide on gas-diffusion electrodes modified by metal phthalocyanines

Electrochemical CO 2 reduction was examined on high-area transition metal catalysts supported on nanoporous activated carbon fiber (ACF) supports, in the form of gas diffusion electrodes, in aqueous KHCO 3 solution. The most active catalyst was ACF/Ni, on which up to ca 65 mA cm À2 current density for CO production was observed, with simultaneous production of hydrogen of ca 15 mA cm À2 at À1.6 V vs SCE. At more negative potentials, higher H 2 /CO ratios can be obtained. The reaction mechanism for CO production probably involves a chemical reaction between CO 2 and the radical anion CO 2 .À to produce the CO 2 dimer radical anion (CO 2 ) 2 .À . The results are compared with those for photoelectrochemical CO 2 reduction on p-InP, on which the mechanism is thought to involve the one-electron reduction of two adsorbed CO 2 molecules to produce the CO 2 dimer radical anion.In contrast to the behavior for hydrogen evolution, the PCD values for CO 2 reduction did not vary greatly with potential. However, the values varied considerably for the different catalysts. As already described, the ACF/Ni catalyst exhibited the high-

show abstract

“…To explain the lack of potential dependence, any of Eqns [2], [4], [5], or [7] could be rate determining.…”

Section: Reaction Mechanism For Co 2 Reductionmentioning

confidence: 99%

“…[2][3][4][5][6][7][8][9][10][11][12][13][14] We have recently been pursuing the idea of using nanoporous catalyst supports, such as activated carbon fibers (ACFs), on which CO 2 is known to exhibit enhanced adsorption. 15,16 Within nanometer-scale pores, so-called nanospace effects, i.e.…”

Section: Introductionmentioning

confidence: 99%

Recent developments in electrochemical and photoelectrochemical CO2 reduction: involvement of the (CO2)2. ? dimer radical anion

Tryk

Yamamoto

Kokubun

et al. 2001

Appl. Organometal. Chem.

View full text Add to dashboard Cite

show abstract

“…Metal complexes do not seem to be very effective for hydrocarbon and alcohol formation possibly because the contact time of the CO 2 with the catalyst is limited, and the metal‐carbon bond gets dissociated quickly; thus, the multielectron transfer mechanism gets hindered. However, some efforts were made, and HCs and alcohols production is reported in few of the cases . Furuya et al and Magdesieva et al reported the formation of CH 4 using Cu, Ga, and Ti phthalocyanins .…”

Section: Electrocatalysts For Synthesis Of Green Fuelsmentioning

confidence: 99%

Electrochemical reduction of CO₂ for synthesis of green fuel

Malik

Singh

Basu

et al. 2017

WIREs Energy & Environment

View full text Add to dashboard Cite

The depletion of increasing CO2 of the atmosphere and the generation of alternate fuel sources are among the biggest challenges being faced by the scientific community across the globe. This scenario has propelled work in the direction of utilization of CO2 by various methods. Electrochemical reduction of CO2 is one of the leading research areas that may be useful not only for the utilization of CO2 but also for the generation of green fuels and storage of renewable energy (solar or wind). However, the process is kinetically impeded and less selective toward a specific product and, therefore, requires efficient electrocatalysts. Much work has already been done in this field, and significant success has also been achieved. Hence, in this review paper, the potential of electrochemical reduction of CO2 for fuel generation is discussed, with special focus on electrocatalysts. The suitability of different electrocatalysts is addressed along with the possible scope for enhancing the efficiency of the process. WIREs Energy Environ 2017, 6:e244. doi: 10.1002/wene.244 This article is categorized under: Fuel Cells and Hydrogen > Climate and Environment

show abstract

“…In a pH 2 buffer, the reduction occurred at -0.80 V vs. SCE. Reduction of carbon monoxide, formic acid, and formaldehyde was mediated by Co(1) that was electrogenerated in a Co(1I)phthalocyanine film on glassy carbon [44]; carbon dioxide was reduced to CO on CoPC [45, 461 and on NiPC [45] electrodes and to formic acid with metal centers such as Sn, Pb, and Ir [45]. The reduction of nitrogen to ammonia with initial current efficiencies of ca.…”

Section: As Electrocatalystsmentioning

confidence: 99%

Electroanalysis with electrodes modified by inorganic films

1991

View full text Add to dashboard Cite

show abstract

Electroreduction of carbon dioxide on gas-diffusion electrodes modified by metal phthalocyanines

Cited by 150 publications

References 17 publications

Recent developments in electrochemical and photoelectrochemical CO2 reduction: involvement of the (CO2)2. ? dimer radical anion

Recent developments in electrochemical and photoelectrochemical CO2 reduction: involvement of the (CO2)2. ? dimer radical anion

Electrochemical reduction of CO₂ for synthesis of green fuel

Electroanalysis with electrodes modified by inorganic films

Contact Info

Product

Resources

About

Electroreduction of carbon dioxide on gas-diffusion electrodes modified by metal phthalocyanines

Cited by 150 publications

References 17 publications

Recent developments in electrochemical and photoelectrochemical CO2 reduction: involvement of the (CO2)2. ? dimer radical anion

Recent developments in electrochemical and photoelectrochemical CO2 reduction: involvement of the (CO2)2. ? dimer radical anion

Electrochemical reduction of CO2 for synthesis of green fuel

Electroanalysis with electrodes modified by inorganic films

Contact Info

Product

Resources

About

Electrochemical reduction of CO₂ for synthesis of green fuel