Platinum quantum dots-decorated MXene-derived titanium dioxide nanowire/Ti3C2 heterostructure for use in solar-driven gas-phase carbon dioxide reduction to yield value-added fuels

Kamakshaiah Charyulu Devarayapalli; S. V. Prabhakar Vattikuti; Dong Jin Kim; Youngsu Lim; Bolam Kim; Gyuhyeon Kim; Dae Sung Lee

doi:10.1016/j.jechem.2023.03.034

Platinum quantum dots-decorated MXene-derived titanium dioxide nanowire/Ti₃C₂ heterostructure for use in solar-driven gas-phase carbon dioxide reduction to yield value-added fuels

Kamakshaiah Charyulu Devarayapalli, S. V. Prabhakar Vattikuti, Dong Jin Kim, Youngsu Lim, Bolam Kim, Gyuhyeon Kim, Dae Sung Lee

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

Solar-driven photocatalytic CO₂ reduction to produce valuable chemicals and fuels offers an attractive strategy in alleviating the energy crisis. Pt quantum dots (PtQDs) with TiO₂ nanowire (TiO₂NW)/Ti₃C₂ MXene heterostructures (Pt-TiO₂NW/Ti₃C₂) with tight interfacial contacts between the various components were prepared at room temperature via oxidation reactions. The incorporated PtQDs played crucial roles as electron conduction bridges supported by the cocatalyst effect, effectively enhancing the separation efficiencies of photoinduced electron/hole pairs and improving CO₂ reduction under simulated solar light irradiation. The Pt-TiO₂NW/Ti₃C₂ heterostructures exhibited remarkable carbon monoxide (CO) and methane (CH₄) production at respective rates of 38.14 and 36.15 μmol g⁻¹ after 10 h of simulated solar light irradiation, an apparent quantum yield of 1.68%, and 79.2% selectivity for CH₄. The photocatalytic activities of the Pt-TiO₂NW/Ti₃C₂ heterostructures for CO₂ reduction were significantly enhanced compared to those of TiO₂NW/Ti₃C₂ and the single-component photocatalysts, and they exhibited remarkable stabilities even after five cycles. In addition, the densities of states and electronic characteristics of Ti₃C₂ MXene and Pt-TiO₂NW/Ti₃C₂ were studied using density functional theory, and a synergistic mechanism of the improvement in CO₂ photoreduction is proposed.

Original language	English
Pages (from-to)	627-637
Number of pages	11
Journal	Journal of Energy Chemistry
Volume	82
DOIs	https://doi.org/10.1016/j.jechem.2023.03.034
State	Published - Jul 2023

Keywords

CO reduction
Density functional theory
MXene
Photocatalyst
Quantum dot

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10.1016/j.jechem.2023.03.034

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Charyulu Devarayapalli, K., Prabhakar Vattikuti, S. V., Kim, D. J., Lim, Y., Kim, B., Kim, G., & Lee, D. S. (2023). Platinum quantum dots-decorated MXene-derived titanium dioxide nanowire/Ti₃C₂ heterostructure for use in solar-driven gas-phase carbon dioxide reduction to yield value-added fuels. Journal of Energy Chemistry, 82, 627-637. https://doi.org/10.1016/j.jechem.2023.03.034

@article{2522d97e1607434eb266a5cd22e29f7c,

title = "Platinum quantum dots-decorated MXene-derived titanium dioxide nanowire/Ti3C2 heterostructure for use in solar-driven gas-phase carbon dioxide reduction to yield value-added fuels",

abstract = "Solar-driven photocatalytic CO2 reduction to produce valuable chemicals and fuels offers an attractive strategy in alleviating the energy crisis. Pt quantum dots (PtQDs) with TiO2 nanowire (TiO2NW)/Ti3C2 MXene heterostructures (Pt-TiO2NW/Ti3C2) with tight interfacial contacts between the various components were prepared at room temperature via oxidation reactions. The incorporated PtQDs played crucial roles as electron conduction bridges supported by the cocatalyst effect, effectively enhancing the separation efficiencies of photoinduced electron/hole pairs and improving CO2 reduction under simulated solar light irradiation. The Pt-TiO2NW/Ti3C2 heterostructures exhibited remarkable carbon monoxide (CO) and methane (CH4) production at respective rates of 38.14 and 36.15 μmol g−1 after 10 h of simulated solar light irradiation, an apparent quantum yield of 1.68%, and 79.2% selectivity for CH4. The photocatalytic activities of the Pt-TiO2NW/Ti3C2 heterostructures for CO2 reduction were significantly enhanced compared to those of TiO2NW/Ti3C2 and the single-component photocatalysts, and they exhibited remarkable stabilities even after five cycles. In addition, the densities of states and electronic characteristics of Ti3C2 MXene and Pt-TiO2NW/Ti3C2 were studied using density functional theory, and a synergistic mechanism of the improvement in CO2 photoreduction is proposed.",

keywords = "CO reduction, Density functional theory, MXene, Photocatalyst, Quantum dot",

author = "{Charyulu Devarayapalli}, Kamakshaiah and {Prabhakar Vattikuti}, {S. V.} and Kim, {Dong Jin} and Youngsu Lim and Bolam Kim and Gyuhyeon Kim and Lee, {Dae Sung}",

note = "Publisher Copyright: {\textcopyright} 2023 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences",

year = "2023",

month = jul,

doi = "10.1016/j.jechem.2023.03.034",

language = "English",

volume = "82",

pages = "627--637",

journal = "Journal of Energy Chemistry",

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publisher = "Elsevier B.V.",

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Charyulu Devarayapalli, K, Prabhakar Vattikuti, SV, Kim, DJ, Lim, Y, Kim, B, Kim, G & Lee, DS 2023, 'Platinum quantum dots-decorated MXene-derived titanium dioxide nanowire/Ti₃C₂ heterostructure for use in solar-driven gas-phase carbon dioxide reduction to yield value-added fuels', Journal of Energy Chemistry, vol. 82, pp. 627-637. https://doi.org/10.1016/j.jechem.2023.03.034

Platinum quantum dots-decorated MXene-derived titanium dioxide nanowire/Ti₃C₂ heterostructure for use in solar-driven gas-phase carbon dioxide reduction to yield value-added fuels. / Charyulu Devarayapalli, Kamakshaiah; Prabhakar Vattikuti, S. V.; Kim, Dong Jin et al.
In: Journal of Energy Chemistry, Vol. 82, 07.2023, p. 627-637.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Platinum quantum dots-decorated MXene-derived titanium dioxide nanowire/Ti3C2 heterostructure for use in solar-driven gas-phase carbon dioxide reduction to yield value-added fuels

AU - Charyulu Devarayapalli, Kamakshaiah

AU - Prabhakar Vattikuti, S. V.

AU - Kim, Dong Jin

AU - Lim, Youngsu

AU - Kim, Bolam

AU - Kim, Gyuhyeon

AU - Lee, Dae Sung

PY - 2023/7

Y1 - 2023/7

N2 - Solar-driven photocatalytic CO2 reduction to produce valuable chemicals and fuels offers an attractive strategy in alleviating the energy crisis. Pt quantum dots (PtQDs) with TiO2 nanowire (TiO2NW)/Ti3C2 MXene heterostructures (Pt-TiO2NW/Ti3C2) with tight interfacial contacts between the various components were prepared at room temperature via oxidation reactions. The incorporated PtQDs played crucial roles as electron conduction bridges supported by the cocatalyst effect, effectively enhancing the separation efficiencies of photoinduced electron/hole pairs and improving CO2 reduction under simulated solar light irradiation. The Pt-TiO2NW/Ti3C2 heterostructures exhibited remarkable carbon monoxide (CO) and methane (CH4) production at respective rates of 38.14 and 36.15 μmol g−1 after 10 h of simulated solar light irradiation, an apparent quantum yield of 1.68%, and 79.2% selectivity for CH4. The photocatalytic activities of the Pt-TiO2NW/Ti3C2 heterostructures for CO2 reduction were significantly enhanced compared to those of TiO2NW/Ti3C2 and the single-component photocatalysts, and they exhibited remarkable stabilities even after five cycles. In addition, the densities of states and electronic characteristics of Ti3C2 MXene and Pt-TiO2NW/Ti3C2 were studied using density functional theory, and a synergistic mechanism of the improvement in CO2 photoreduction is proposed.

AB - Solar-driven photocatalytic CO2 reduction to produce valuable chemicals and fuels offers an attractive strategy in alleviating the energy crisis. Pt quantum dots (PtQDs) with TiO2 nanowire (TiO2NW)/Ti3C2 MXene heterostructures (Pt-TiO2NW/Ti3C2) with tight interfacial contacts between the various components were prepared at room temperature via oxidation reactions. The incorporated PtQDs played crucial roles as electron conduction bridges supported by the cocatalyst effect, effectively enhancing the separation efficiencies of photoinduced electron/hole pairs and improving CO2 reduction under simulated solar light irradiation. The Pt-TiO2NW/Ti3C2 heterostructures exhibited remarkable carbon monoxide (CO) and methane (CH4) production at respective rates of 38.14 and 36.15 μmol g−1 after 10 h of simulated solar light irradiation, an apparent quantum yield of 1.68%, and 79.2% selectivity for CH4. The photocatalytic activities of the Pt-TiO2NW/Ti3C2 heterostructures for CO2 reduction were significantly enhanced compared to those of TiO2NW/Ti3C2 and the single-component photocatalysts, and they exhibited remarkable stabilities even after five cycles. In addition, the densities of states and electronic characteristics of Ti3C2 MXene and Pt-TiO2NW/Ti3C2 were studied using density functional theory, and a synergistic mechanism of the improvement in CO2 photoreduction is proposed.

KW - CO reduction

KW - Density functional theory

KW - MXene

KW - Photocatalyst

KW - Quantum dot

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U2 - 10.1016/j.jechem.2023.03.034

DO - 10.1016/j.jechem.2023.03.034

M3 - Article

AN - SCOPUS:85159062435

SN - 2095-4956

VL - 82

SP - 627

EP - 637

JO - Journal of Energy Chemistry

JF - Journal of Energy Chemistry

ER -

Platinum quantum dots-decorated MXene-derived titanium dioxide nanowire/Ti₃C₂ heterostructure for use in solar-driven gas-phase carbon dioxide reduction to yield value-added fuels

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