Abstract
Conversion of CO 2 to energy-rich chemicals using renewable energy is of much interest to close the anthropogenic carbon cycle. However, the current photoelectrochemical systems are still far from being practically feasible. Here the successful demonstration of a continuous, energy efficient, and scalable solar-driven CO 2 reduction process based on earth-abundant molybdenum disulfide (MoS 2 ) catalyst, which works in synergy with an inexpensive hybrid electrolyte of choline chloride (a common food additive for livestock) and potassium hydroxide (KOH) is reported. The CO 2 saturated hybrid electrolyte utilized in this study also acts as a buffer solution (pH ≈ 7.6) to adjust pH during the reactions. This study reveals that this system can efficiently convert CO 2 to CO with solar-to-fuel and catalytic conversion efficiencies of 23% and 83%, respectively. Using density functional theory calculations, a new reaction mechanism in which the water molecules near the MoS 2 cathode act as proton donors to facilitate the CO 2 reduction process by MoS 2 catalyst is proposed. This demonstration of a continuous, cost-effective, and energy efficient solar driven CO 2 conversion process is a key step toward the industrialization of this technology.
| Original language | English (US) |
|---|---|
| Article number | 1803536 |
| Journal | Advanced Energy Materials |
| Volume | 9 |
| Issue number | 9 |
| DOIs | |
| State | Published - Mar 6 2019 |
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Keywords
- flow cells
- photochemical
- photoelectrochemical
- solar to fuel conversion
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
Cite this
Highly Efficient Solar-Driven Carbon Dioxide Reduction on Molybdenum Disulfide Catalyst Using Choline Chloride-Based Electrolyte. / Asadi, Mohammad; Motevaselian, Mohammad Hossein; Moradzadeh, Alireza; Majidi, Leily; Esmaeilirad, Mohammadreza; Sun, Tao Victor; Liu, Cong; Bose, Rumki; Abbasi, Pedram; Zapol, Peter; Khodadoust, Amid P.; Curtiss, Larry A.; Aluru, Narayana R.; Salehi-Khojin, Amin.
In: Advanced Energy Materials, Vol. 9, No. 9, 1803536, 06.03.2019.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Highly Efficient Solar-Driven Carbon Dioxide Reduction on Molybdenum Disulfide Catalyst Using Choline Chloride-Based Electrolyte
AU - Asadi, Mohammad
AU - Motevaselian, Mohammad Hossein
AU - Moradzadeh, Alireza
AU - Majidi, Leily
AU - Esmaeilirad, Mohammadreza
AU - Sun, Tao Victor
AU - Liu, Cong
AU - Bose, Rumki
AU - Abbasi, Pedram
AU - Zapol, Peter
AU - Khodadoust, Amid P.
AU - Curtiss, Larry A.
AU - Aluru, Narayana R.
AU - Salehi-Khojin, Amin
PY - 2019/3/6
Y1 - 2019/3/6
N2 - Conversion of CO 2 to energy-rich chemicals using renewable energy is of much interest to close the anthropogenic carbon cycle. However, the current photoelectrochemical systems are still far from being practically feasible. Here the successful demonstration of a continuous, energy efficient, and scalable solar-driven CO 2 reduction process based on earth-abundant molybdenum disulfide (MoS 2 ) catalyst, which works in synergy with an inexpensive hybrid electrolyte of choline chloride (a common food additive for livestock) and potassium hydroxide (KOH) is reported. The CO 2 saturated hybrid electrolyte utilized in this study also acts as a buffer solution (pH ≈ 7.6) to adjust pH during the reactions. This study reveals that this system can efficiently convert CO 2 to CO with solar-to-fuel and catalytic conversion efficiencies of 23% and 83%, respectively. Using density functional theory calculations, a new reaction mechanism in which the water molecules near the MoS 2 cathode act as proton donors to facilitate the CO 2 reduction process by MoS 2 catalyst is proposed. This demonstration of a continuous, cost-effective, and energy efficient solar driven CO 2 conversion process is a key step toward the industrialization of this technology.
AB - Conversion of CO 2 to energy-rich chemicals using renewable energy is of much interest to close the anthropogenic carbon cycle. However, the current photoelectrochemical systems are still far from being practically feasible. Here the successful demonstration of a continuous, energy efficient, and scalable solar-driven CO 2 reduction process based on earth-abundant molybdenum disulfide (MoS 2 ) catalyst, which works in synergy with an inexpensive hybrid electrolyte of choline chloride (a common food additive for livestock) and potassium hydroxide (KOH) is reported. The CO 2 saturated hybrid electrolyte utilized in this study also acts as a buffer solution (pH ≈ 7.6) to adjust pH during the reactions. This study reveals that this system can efficiently convert CO 2 to CO with solar-to-fuel and catalytic conversion efficiencies of 23% and 83%, respectively. Using density functional theory calculations, a new reaction mechanism in which the water molecules near the MoS 2 cathode act as proton donors to facilitate the CO 2 reduction process by MoS 2 catalyst is proposed. This demonstration of a continuous, cost-effective, and energy efficient solar driven CO 2 conversion process is a key step toward the industrialization of this technology.
KW - flow cells
KW - photochemical
KW - photoelectrochemical
KW - solar to fuel conversion
UR - http://www.scopus.com/inward/record.url?scp=85060348617&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85060348617&partnerID=8YFLogxK
U2 - 10.1002/aenm.201803536
DO - 10.1002/aenm.201803536
M3 - Article
AN - SCOPUS:85060348617
VL - 9
JO - Advanced Energy Materials
JF - Advanced Energy Materials
SN - 1614-6832
IS - 9
M1 - 1803536
ER -