Molten-salt assisted synthesis of Cu clusters modified TiO2 with oxygen vacancies for efficient photocatalytic reduction of CO2 to CO

Bao, Xiaolei; Zhang, Minghui; Wang, Zeyan; Dai, Dujuan; Wang, Peng; Cheng, Hefeng; Liu, Yuanyuan; Zheng, Zhaoke; Dai, Ying; Huang, Baibiao

doi:10.1016/j.cej.2022.136718

Cited by 61 publications

(23 citation statements)

References 56 publications

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“…This photoactivity performance for CO 2 reduction of C–TiO 2 –Cu is excellent compared to the other TiO 2 -based photocatalyst reported (Table S1). − The curves of time courses (Figure d,f) illustrate that CO and CH 4 production amounts of the photocatalysts grow linearly with the illumination time, indicating that the processes of CO 2 reduction are stable. The excellent activity of C–TiO 2 –Cu for CO 2 reduction is attributed to the unique nanostructures built by a mesoporous framework, small size, and pure anatase phase, which can reduce the transfer distance of the charge carrier and provide more active sites for CO 2 reduction.…”

Section: Resultsmentioning

confidence: 95%

Netted C-Doped TiO₂ Mesoporous Nanostructure Decorated by Cu Nanoparticles for Photocatalytic CO₂ Reduction

Tai

Sun

Wang

et al. 2022

ACS Appl. Nano Mater.

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Acquiring an anatase TiO 2 catalyst with tiny size and high crystallinity for excellent photocatalytic performance still remains a huge challenge. Herein, a mesoporous C-doped TiO 2 netted nanostructure is successfully synthesized by a vacuum dipping and calcination method, where the thin film of multiwalled carbon nanotubes is skillfully utilized as the confinement template to suppress the grain growth and phase transfer. In addition, small Cu nanoparticles are deposited on the surfaces of the TiO 2 by an electronic beam evaporation way. The obtained C−TiO 2 −Cu photocatalyst exhibits high CH 4 and CO production rates of 8.8 and 60.3 μmol/g/h, respectively, which are excellent among the TiO 2 -based photocatalysts. This high performance originates from the following synergistic effects. This good crystalline and small size can facilitate the charge separation, while this unique netted mesoporous structure will provide sufficient sites for the reaction. Moreover, the C doping can enhance light absorption and the plasmonic Cu can inject hot electrons into TiO 2 , which will increase the amounts of electrons and promote their transfer.

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Section: Resultsmentioning

confidence: 95%

Netted C-Doped TiO₂ Mesoporous Nanostructure Decorated by Cu Nanoparticles for Photocatalytic CO₂ Reduction

Tai

Sun

Wang

et al. 2022

ACS Appl. Nano Mater.

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“…To gain more insights into the CO 2 hydrogenation reaction pathways over the CuPt/TiO 2– x (OH) y /TiO 2 catalyst, an in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) study was conducted. As shown in Figure , typical species can be observed on the catalyst surface, including monodentate carbonate (1365 cm –1 ), bidentate carbonate (1546 cm –1 ), and bicarbonate (1451 cm –1 ) . The presence of these species suggested that CO 2 could be adsorbed and activated on the surface of the CuPt/TiO 2– x (OH) y /TiO 2 catalyst.…”

Section: Resultsmentioning

confidence: 99%

“…As shown in Figure 8, typical species can be observed on the catalyst surface, including monodentate carbonate (1365 cm −1 ), bidentate carbonate (1546 cm −1 ), and bicarbonate (1451 cm −1 ). 60 The presence of these species suggested that CO 2 could be adsorbed and activated on the surface of the CuPt/ TiO 2−x (OH) y /TiO 2 catalyst. The absorption peak located at 2065 cm −1 was attributed to the presence of bridged and linearly adsorbed CO on the catalyst.…”

Section: ■ Introductionmentioning

confidence: 99%

Improving the CO₂ Hydrogenation Activity of Photocatalysts via the Synergy between Surface Frustrated Lewis Pairs and the CuPt Alloy

Gao

Cao

Chang

et al. 2023

ACS Sustainable Chem. Eng.

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Recently, the surface frustrated Lewis pairs (SFLP) have attracted more and more attention in the field of CO 2 hydrogenation. The main research studies have focused on a single construction of SFLP; however, the exploration of the synergy between SFLP and other excellent techniques has been barely reported. In this work, a common photocatalyst, TiO 2 , was chosen as the research object and amorphous TiO 2−x (OH) y and CuPt alloy were constructed on its surface to investigate the synergy between SFLP and the metal cocatalyst technique. The amorphous TiO 2−x (OH) y could form effective SFLP to increase CO 2 activation, and the CuPt alloy was beneficial for H 2 dissociation to boost the formation of protonated/hydridic H. The synergy resulted in CuPt/TiO 2−x (OH) y /TiO 2 exhibiting significantly increased activity for the reverse water gas shift (RWGS) reaction compared to those of TiO 2−x (OH) y /TiO 2 , CuPt/ TiO 2 , and pristine TiO 2 . This work highlights an important research direction for the SFLP application in the field of CO 2 hydrogenation.

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“…The continuous increase in global population and human activities such as industrialization and fossil fuel extraction have caused atmospheric CO 2 concentrations to exceed 410 ppm, , which is believed to be the leading cause of sea-level rise and global warming. , Since Fujishima and his colleagues first reported the photoreduction of CO 2 to hydrocarbons via photocatalysts, the utilization of inexhaustible solar energy for the conversion of CO 2 to solar fuels has been hotly debated as it can address the energy issue while also lowering CO 2 levels in the atmosphere. − …”

Section: Introductionmentioning

confidence: 99%

Photothermal Coupling Effect Boosts the Conversion of CO₂ to Solar Fuel Over Pt/ZnO Photocatalyst in a Concentrated Solar Reactor

Ren

Zhu

et al. 2023

Ind. Eng. Chem. Res.

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The low photocatalytic reaction rate and energy conversion efficiency are the key factors restricting the direct solar-driven CO2 production of solar fuels. Here, the photothermal coupling system based on the concentrated irradiation of Fresnel lenses was designed for the light-driven CO2 conversion process. Under the condition of concentrated irradiation, the solar energy to chemical energy conversion efficiency increased from 0.012 to 0.264%, while the CO yield increased 120 times (from 0.96 to 115.32 μmol g–1 h–1) over the Pt/ZnO photocatalyst, with significant performance resulting from the increase of carrier concentration and Fermi level and the decrease of apparent activation energy. Pt nanoparticles improved the light absorption performance and surface temperature of the photocatalyst under concentrated light irradiation. Photoelectrochemical measurements, evaluation of the photocatalytic performance at different wavelengths, and apparent activation energy calculations revealed that concentrated light irradiation can be an effective way to reduce apparent activation energy (from 48.19 to 37.23 kJ/mol). This provided a potentially feasible method for efficient and green utilization of CO2 driven by solar energy.

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Molten-salt assisted synthesis of Cu clusters modified TiO2 with oxygen vacancies for efficient photocatalytic reduction of CO2 to CO

Cited by 61 publications

References 56 publications

Netted C-Doped TiO₂ Mesoporous Nanostructure Decorated by Cu Nanoparticles for Photocatalytic CO₂ Reduction

Netted C-Doped TiO₂ Mesoporous Nanostructure Decorated by Cu Nanoparticles for Photocatalytic CO₂ Reduction

Improving the CO₂ Hydrogenation Activity of Photocatalysts via the Synergy between Surface Frustrated Lewis Pairs and the CuPt Alloy

Photothermal Coupling Effect Boosts the Conversion of CO₂ to Solar Fuel Over Pt/ZnO Photocatalyst in a Concentrated Solar Reactor

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Molten-salt assisted synthesis of Cu clusters modified TiO2 with oxygen vacancies for efficient photocatalytic reduction of CO2 to CO

Cited by 61 publications

References 56 publications

Netted C-Doped TiO2 Mesoporous Nanostructure Decorated by Cu Nanoparticles for Photocatalytic CO2 Reduction

Netted C-Doped TiO2 Mesoporous Nanostructure Decorated by Cu Nanoparticles for Photocatalytic CO2 Reduction

Improving the CO2 Hydrogenation Activity of Photocatalysts via the Synergy between Surface Frustrated Lewis Pairs and the CuPt Alloy

Photothermal Coupling Effect Boosts the Conversion of CO2 to Solar Fuel Over Pt/ZnO Photocatalyst in a Concentrated Solar Reactor

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Netted C-Doped TiO₂ Mesoporous Nanostructure Decorated by Cu Nanoparticles for Photocatalytic CO₂ Reduction

Netted C-Doped TiO₂ Mesoporous Nanostructure Decorated by Cu Nanoparticles for Photocatalytic CO₂ Reduction

Improving the CO₂ Hydrogenation Activity of Photocatalysts via the Synergy between Surface Frustrated Lewis Pairs and the CuPt Alloy

Photothermal Coupling Effect Boosts the Conversion of CO₂ to Solar Fuel Over Pt/ZnO Photocatalyst in a Concentrated Solar Reactor