High-pressure synthesis of CO and syngas from CO2 reduction using Ni-N-doped porous carbon electrocatalyst

Federica Proietto; Simin Li; Alessandra Loria; Xing-Ming Hu; Alessandro Galia; Marcel Ceccato; Kim Daasbjerg; Onofrio Scialdone

doi:10.1016/j.cej.2021.132251

High-pressure synthesis of CO and syngas from CO₂ reduction using Ni-N-doped porous carbon electrocatalyst

Federica Proietto, Simin Li, Alessandra Loria, Xing-Ming Hu, Alessandro Galia, Marcel Ceccato, Kim Daasbjerg^*, Onofrio Scialdone^*

^*Corresponding author for this work

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

10 Citations (Scopus)

Abstract

Electrochemical conversion of CO2 to CO or syngas (CO/H2 mixture) is considered one of the most promising approaches to valorise waste-CO2. To develop the process on industrial scale, it would be necessary to use selective and inexpensive electrodes and to obtain high productivities with low energy consumption. In this frame, Ni-NC catalysts are considered among the most interesting ones because of their relatively low cost, high faradaic efficiency in CO (FE_CO), and high stability. However, up to now, quite low productivities were obtained as a result of low current densities achieved in aqueous electrolytes. In this work, we have evaluated the performances of a Ni-NC electrocatalyst at relatively high carbon dioxide pressures (5-30 bar) in a wide range of cell potentials and current densities. It is found that proper selection of CO2 pressure and catalyst loading improves drastically the performance of the process, obtaining high FE_CO (close to 100 %), high current densities (>100 mA cm-2), and high productivities. Furthermore, it is shown that it is possible to obtain syngas with a target ratio of two between H2 and CO under various operating conditions. As an example, syngas was obtained with FE close to 100% and a productivity of ~18 mol h-1 m-2 working at 30 bar with a current density close to 195 mA cm-2.

Original language	English
Article number	132251
Journal	Chemical Engineering Journal
Volume	429
Number of pages	10
ISSN	1385-8947
DOIs	https://doi.org/10.1016/j.cej.2021.132251
Publication status	Published - Feb 2022

Keywords

CO
CO reduction
High pressure
Ni−NC electrocatalyst
Syngas

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10.1016/j.cej.2021.132251

Cite this

@article{665e66c034e84445ad479b41158c7e12,

title = "High-pressure synthesis of CO and syngas from CO2 reduction using Ni-N-doped porous carbon electrocatalyst",

abstract = "Electrochemical conversion of CO2 to CO or syngas (CO/H2 mixture) is considered one of the most promising approaches to valorise waste-CO2. To develop the process on industrial scale, it would be necessary to use selective and inexpensive electrodes and to obtain high productivities with low energy consumption. In this frame, Ni-NC catalysts are considered among the most interesting ones because of their relatively low cost, high faradaic efficiency in CO (FE_CO), and high stability. However, up to now, quite low productivities were obtained as a result of low current densities achieved in aqueous electrolytes. In this work, we have evaluated the performances of a Ni-NC electrocatalyst at relatively high carbon dioxide pressures (5-30 bar) in a wide range of cell potentials and current densities. It is found that proper selection of CO2 pressure and catalyst loading improves drastically the performance of the process, obtaining high FE_CO (close to 100 %), high current densities (>100 mA cm-2), and high productivities. Furthermore, it is shown that it is possible to obtain syngas with a target ratio of two between H2 and CO under various operating conditions. As an example, syngas was obtained with FE close to 100% and a productivity of ~18 mol h-1 m-2 working at 30 bar with a current density close to 195 mA cm-2.",

keywords = "CO, CO reduction, High pressure, Ni−NC electrocatalyst, Syngas",

author = "Federica Proietto and Simin Li and Alessandra Loria and Xing-Ming Hu and Alessandro Galia and Marcel Ceccato and Kim Daasbjerg and Onofrio Scialdone",

year = "2022",

month = feb,

doi = "10.1016/j.cej.2021.132251",

language = "English",

volume = "429",

journal = "Chemical Engineering Journal",

issn = "1385-8947",

publisher = "Elsevier B.V.",

}

High-pressure synthesis of CO and syngas from CO₂ reduction using Ni-N-doped porous carbon electrocatalyst. / Proietto, Federica; Li, Simin; Loria, Alessandra et al.
In: Chemical Engineering Journal, Vol. 429, 132251, 02.2022.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

TY - JOUR

T1 - High-pressure synthesis of CO and syngas from CO2 reduction using Ni-N-doped porous carbon electrocatalyst

AU - Proietto, Federica

AU - Li, Simin

AU - Loria, Alessandra

AU - Hu, Xing-Ming

AU - Galia, Alessandro

AU - Ceccato, Marcel

AU - Daasbjerg, Kim

AU - Scialdone, Onofrio

PY - 2022/2

Y1 - 2022/2

N2 - Electrochemical conversion of CO2 to CO or syngas (CO/H2 mixture) is considered one of the most promising approaches to valorise waste-CO2. To develop the process on industrial scale, it would be necessary to use selective and inexpensive electrodes and to obtain high productivities with low energy consumption. In this frame, Ni-NC catalysts are considered among the most interesting ones because of their relatively low cost, high faradaic efficiency in CO (FE_CO), and high stability. However, up to now, quite low productivities were obtained as a result of low current densities achieved in aqueous electrolytes. In this work, we have evaluated the performances of a Ni-NC electrocatalyst at relatively high carbon dioxide pressures (5-30 bar) in a wide range of cell potentials and current densities. It is found that proper selection of CO2 pressure and catalyst loading improves drastically the performance of the process, obtaining high FE_CO (close to 100 %), high current densities (>100 mA cm-2), and high productivities. Furthermore, it is shown that it is possible to obtain syngas with a target ratio of two between H2 and CO under various operating conditions. As an example, syngas was obtained with FE close to 100% and a productivity of ~18 mol h-1 m-2 working at 30 bar with a current density close to 195 mA cm-2.

AB - Electrochemical conversion of CO2 to CO or syngas (CO/H2 mixture) is considered one of the most promising approaches to valorise waste-CO2. To develop the process on industrial scale, it would be necessary to use selective and inexpensive electrodes and to obtain high productivities with low energy consumption. In this frame, Ni-NC catalysts are considered among the most interesting ones because of their relatively low cost, high faradaic efficiency in CO (FE_CO), and high stability. However, up to now, quite low productivities were obtained as a result of low current densities achieved in aqueous electrolytes. In this work, we have evaluated the performances of a Ni-NC electrocatalyst at relatively high carbon dioxide pressures (5-30 bar) in a wide range of cell potentials and current densities. It is found that proper selection of CO2 pressure and catalyst loading improves drastically the performance of the process, obtaining high FE_CO (close to 100 %), high current densities (>100 mA cm-2), and high productivities. Furthermore, it is shown that it is possible to obtain syngas with a target ratio of two between H2 and CO under various operating conditions. As an example, syngas was obtained with FE close to 100% and a productivity of ~18 mol h-1 m-2 working at 30 bar with a current density close to 195 mA cm-2.

KW - CO

KW - CO reduction

KW - High pressure

KW - Ni−NC electrocatalyst

KW - Syngas

U2 - 10.1016/j.cej.2021.132251

DO - 10.1016/j.cej.2021.132251

M3 - Journal article

SN - 1385-8947

VL - 429

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

M1 - 132251