Solar cell driven electrochemical process for the reduction of CO 2  to HCOOH on Zn and Sn electrocatalysts

Yadav, V. S. K.; Purkait, Mihir Kumar

doi:10.1016/j.solener.2015.11.037

Cited by 14 publications

(7 citation statements)

References 39 publications

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“…2 Hence, apart from Cu-based electrocatalysts, other medium hydrogen overvoltage metals like Zn, Au, and Ag have also been explored for the reduction of CO 2 . 24,[27][28][29] In general, product selectivity depends on parameters like the nature of the electrode, electrolyte, pH, and potential applied. 30 The supporting electrolyte influences the solubility and modes of adsorption of intermediates during CO 2 reduction.…”

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confidence: 99%

Electrochemical Reduction of Carbon Dioxide on Zinc-Modified Copper Electrodes

Gopalram

Chetty

2017

J. Electrochem. Soc.

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Electrochemical reduction of carbon dioxide (CO 2 ) was performed on zinc-deposited copper (Cu/Zn) electrodes, and the faradaic efficiency of this system toward methane, ethane, and hydrogen was evaluated. Hierarchically structured Zn was electrodeposited on a Cu substrate under constant voltage in a varying bath concentration of Zn to yield low-and high-concentration deposits, represented as Cu/Zn-A and Cu/Zn-B, respectively. The prepared materials were characterized by X-ray diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy. The reduction of CO 2 was performed with the Cu/Zn electrodes in an H-type cell, and the results obtained were compared with those from bare Cu and Zn electrodes, revealing that a high deposit of Zn on Cu (Cu/Zn-B) shows greater conversion efficiency than does a low Zn deposit (Cu/Zn-A) and the maximum faradaic efficiency of methane follows the order Cu/Zn-B (52%) > Cu (23%) > Zn (7%). Moreover, the efficiency of hydrogen formation is suppressed on Cu/Zn-B (8%) compared to bare Cu (68%) in the potential range studied. The results suggest that depositing Zn on Cu favors a protonation reaction, which results in higher C 1 product formation on a Cu/Zn-B electrode.

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confidence: 99%

Electrochemical Reduction of Carbon Dioxide on Zinc-Modified Copper Electrodes

Gopalram

Chetty

2017

J. Electrochem. Soc.

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“…Co3O4 were prepared through the electrodeposition method. In their two electrode system, the maximum Faradaic efficiency was 78.54% in KHCO3 solution at 1.5 V. The authors also compared the catalytic activity of the Zn cathode with Sn and it was found that the activity of Zn was slightly lower [87]. In this respect, Sn is still a better choice although the cost of Zn is lower.…”

Section: Zinc(zn) Based Catalystsmentioning

confidence: 99%

Progress in inorganic cathode catalysts for electrochemical conversion of carbon dioxide into formate or formic acid

Lan

Humphreys

et al. 2017

J Appl Electrochem

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“…Presently, a variety of products can be obtained by means of electrochemical reduction of CO 2 , such as CO, − formic acid, − methanol, ethanol, and methane . Among them, formic acid (HCOOH) is the most attractive because it is an important industrial chemical and a suitable fuel for the direct formic acid fuel cell; it is also a viable hydrogen storage material due to its high volumetric and a moderate gravimetric hydrogen storage capacity .…”

Section: Introductionmentioning

confidence: 99%

Promoting the Electrochemical Reduction of Carbon Dioxide by a Specially Designed Biomimetic Electrochemical Cell

Fan

Tai

et al. 2018

Ind. Eng. Chem. Res.

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To overcome the difficulties arising from the slow dissolution of CO2 and the depletion of electrolyte in the anodic area, so as to obtain higher space time yield for electrochemical reduction of carbon dioxide to formic acid (ERCO2F), we have designed a biomimetic electrochemical cell (BEC). The BEC has two gas diffusion electrodes separated by a flowing electrolyte regulator, which forces the electrolyte to flow from one electrode to the other, and a formic acid separator in the upstream of the circulating electrolyte. Here, the cathode is a piece of Sn-electroplated Cu foam, and the anode is a piece of pure Ni foam. The results show that the space time yield is 290 μmol h–1 cm–2 at −1.8 V vs Ag/AgCl, respectively, while the Faradaic efficiency remains at 92%, which is 2 times of that in an undivided electrochemical cell (143 μmol h–1 cm–2 at −1.8 V vs Ag/AgCl). Consequently, the BEC successfully speeds up the ERCO2F.

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Solar cell driven electrochemical process for the reduction of CO 2 to HCOOH on Zn and Sn electrocatalysts

Cited by 14 publications

References 39 publications

Electrochemical Reduction of Carbon Dioxide on Zinc-Modified Copper Electrodes

Electrochemical Reduction of Carbon Dioxide on Zinc-Modified Copper Electrodes

Progress in inorganic cathode catalysts for electrochemical conversion of carbon dioxide into formate or formic acid

Promoting the Electrochemical Reduction of Carbon Dioxide by a Specially Designed Biomimetic Electrochemical Cell

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