Porous fixed-bed photoreactor for boosting C–C coupling in photocatalytic CO2 reduction

Bai, Shengjie; Qiu, Haoran; Song, Mengmeng; He, Guiwei; Wang, Feng; Liu, Ya; Guo, Liejin

doi:10.1016/j.esci.2022.06.006

Cited by 90 publications

(48 citation statements)

References 51 publications

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“…Moreover, the signal of CH 2 * is detected at 1385 cm −1 , confirming the hydrogenation of HCHO* [12]. The IR results show that the photocatalytic reduction of CO 2 on the Co 2 SiO 4 /Co 3 O 4 −x surface goes through a sequential process in which COO− and HCHO act as reaction intermediates to generate methanol groups [32]. According to the DRIFTS analysis, a possible CO 2 reduction pathway is summarized in the following reactions [33]: [31].…”

Section: In-situ Driftsmentioning

confidence: 63%

Photothermal Catalytic Reduction of CO2 by Cobalt Silicate Heterojunction Constructed from Clay Minerals

Qin

Ge²,

Kong³

et al. 2022

Catalysts

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The coupled utilization of solar and thermal energy is considered an efficient way to improve the efficiency of CO2 reduction. Herein, palygorskite (Pal) clay is as a silicon source, while Co2+ is introduced to prepare two-dimensional Co2SiO4 nanosheets, and the excess of Co2+ leads to the growth of Co3O4 on the surface of Co2SiO4 to obtain an S-scheme Co2SiO4/Co3O4−x heterojunction, which facilitates the charge transfer and maintains higher redox potentials. Benefiting from black color and a narrow band gap, the cobalt oxide on the surface can increase the light absorption and produce a local photothermal effect. Under proper thermal activation conditions, the photoelectrons captured by the abundant oxygen vacancies can obtain a secondary leap to the semiconductor conduction band (CB), suppressing the recombination of electron-hole pairs, thus favoring the electron transfer on Co2SiO4/Co3O4−x. The composites not only have abundant oxygen vacancies, but also have a large specific surface area for the adsorption and activation of CO2. The yields of CH3OH on Co2SiO4/Co3O4−5% reach as high as 48.9 μmol·g−1·h−1 under simulated sunlight irradiation. In situ DRIFTS is used to explore the photocatalytic reduction CO2 mechanism. It is found that the thermal effect facilitates the generation of the key intermediate COOH* species. This work provides a new strategy for photothermal catalytic CO2 reduction by taking advantage of natural clay and solar energy.

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Section: In-situ Driftsmentioning

confidence: 63%

Photothermal Catalytic Reduction of CO2 by Cobalt Silicate Heterojunction Constructed from Clay Minerals

Qin

Ge²,

Kong³

et al. 2022

Catalysts

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“…1, A and B), suggesting that Bi 3+ species do not dissolve in NaB. It can be assumed that because the V dissolution happens in NaB or NaB + Bi, borate ions can substitute for V 5+ with the adsorbed OH − to form B 4 O 5 (OH) 4 2− (58), causing the activated process with the improved PEC performance. Furthermore, the substitution of V 4+ with the B 3+ induces the surface defects of oxygen vacancies (Vo) on BVO.…”

Section: Borate Ions Activate Bvo In Neutral Conditionsmentioning

confidence: 99%

“…Photoelectrochemical (PEC) water splitting and carbon dioxide reduction reaction have been developed as one of the most promising strategies to capture, convert, and store energy, accomplishing the solar-to-fuel conversion for meeting the increasing energy demands by renewable sources ( 1 – 4 ). Despite these chemicals being generated from water or carbon dioxide reduction reactions at the cathodes ( 4 ), it is crucial to design the highly efficient and stable photoanodes for oxygen evolution reaction (OER) ( 5 – 7 ). Among various photoanode materials, metal oxides [e.g., Fe 2 O 3 ( 8 – 11 ), TiO 2 ( 12 – 14 ), BiVO 4 ( 15 – 18 ), and WO 3 ( 19 – 22 )] have attracted extensive attention owing to their low cost and stable operation.…”

Section: Introductionmentioning

confidence: 99%

Dynamic semiconductor-electrolyte interface for sustainable solar water splitting over 600 hours under neutral conditions

et al. 2023

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Photoelectrochemical (PEC) water splitting that functions in pH-neutral electrolyte attracts increasing attention to energy demand sustainability. Here, we propose a strategy to in situ form a NiB layer by tuning the composition of the neutral electrolyte with the additions of nickel and borate species, which improves the PEC performance of the BiVO 4 photoanode. The NiB/BiVO 4 exhibits a photocurrent density of 6.0 mA cm −2 at 1.23 V RHE with an onset potential of 0.2 V RHE under 1 sun illumination. The photoanode displays a photostability of over 600 hours in a neutral electrolyte. The additive of Ni 2+ in the electrolyte, which efficiently inhibits the dissolution of NiB, can accelerate the photogenerated charge transfer and enhance the water oxidation kinetics. The borate species with B─O bonds act as a promoter of catalyst activity by accelerating proton-coupled electron transfer. The synergy effect of both species suppresses the surface charge recombination and inhibits the photocorrosion of BiVO 4 .

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“…The increased atmospheric CO 2 level has resulted in the deterioration of the global environment, so it is imperative to develop practical strategies to reduce atmospheric CO 2 concentration by efficiently capturing and utilizing emitted CO 2 . − Catalytic conversion of CO 2 into value-added chemicals using H 2 originating from renewable energy sources is a promising approach to alleviate CO 2 emissions. − Among the targeted products, CO is considered one of the most economical products because it is firsthand applicable to a wide range of industrial products, including chemicals, food, metallurgy, and medicine. , Therefore, extensive research efforts have been devoted to the reverse water–gas shift (RWGS) reaction in recent decades. For the RWGS reaction, the popular catalysts normally consist of well-dispersed metal nanoparticles supported on metal oxides. , So far, various precious metals (e.g., Pt, Pd, Au, and Rh) and nonprecious metals (e.g., Cu and Fe) supported on metal oxides have been widely used for the RWGS reaction. − In particular, supported Rh nanoparticles are regarded as one of the most active and chemically stable catalysts for the RWGS reaction due to their robust ability in dissociating hydrogen .…”

Section: Introductionmentioning

confidence: 99%

Photo-Assisted Catalytic CO₂ Hydrogenation to CO with Nearly 100% Selectivity over Rh/TiO₂ Catalysts

Tang

Wang

et al. 2022

Energy Fuels

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Photo-assisted catalytic CO 2 hydrogenation represents a promising route to convert CO 2 into value-added chemicals under mild conditions, but challenges remain in the design and development of highly active and selective catalysts. Herein, we synthesized highly efficient catalysts comprising Rh nanoparticles supported on TiO 2 nanosheets for photo-assisted catalytic CO 2 hydrogenation, which achieved a high CO production rate of 20.6 mmol g cat −1 h −1 (5.15 mol g Rh −1 h −1 ) with nearly 100 % selectivity and excellent stability at 250 °C under light irradiation, outperforming most reported metal-based catalysts. X-ray photoelectron spectroscopy revealed that the electrons transfer from Rh nanoparticles to TiO 2 , hinting a strong interaction between Rh and the TiO 2 support. Under illumination, the accumulated hot electrons on TiO 2 surfaces could effectively promote the activation of CO 2 molecules. In situ diffuse reflectance infrared Fourier transform spectroscopy results revealed that formate was the critical intermediate in the reverse water−gas shift reaction process, and light irradiation could effectively facilitate the activation and conversion of reactants and intermediate species, thereby improving CO production. This work provides a new strategy for the integration of solar and thermal energy for an efficient RWGS reaction under mild conditions.

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Porous fixed-bed photoreactor for boosting C–C coupling in photocatalytic CO2 reduction

Cited by 90 publications

References 51 publications

Photothermal Catalytic Reduction of CO2 by Cobalt Silicate Heterojunction Constructed from Clay Minerals

Photothermal Catalytic Reduction of CO2 by Cobalt Silicate Heterojunction Constructed from Clay Minerals

Dynamic semiconductor-electrolyte interface for sustainable solar water splitting over 600 hours under neutral conditions

Photo-Assisted Catalytic CO₂ Hydrogenation to CO with Nearly 100% Selectivity over Rh/TiO₂ Catalysts

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Porous fixed-bed photoreactor for boosting C–C coupling in photocatalytic CO2 reduction

Cited by 90 publications

References 51 publications

Photothermal Catalytic Reduction of CO2 by Cobalt Silicate Heterojunction Constructed from Clay Minerals

Photothermal Catalytic Reduction of CO2 by Cobalt Silicate Heterojunction Constructed from Clay Minerals

Dynamic semiconductor-electrolyte interface for sustainable solar water splitting over 600 hours under neutral conditions

Photo-Assisted Catalytic CO2 Hydrogenation to CO with Nearly 100% Selectivity over Rh/TiO2 Catalysts

Contact Info

Product

Resources

About

Photo-Assisted Catalytic CO₂ Hydrogenation to CO with Nearly 100% Selectivity over Rh/TiO₂ Catalysts