Photocatalytic CO2 reduction: Photocatalysts, membrane reactors, and hybrid processes

Behroozi, Amir Hossein; Xu, Rong

doi:10.1016/j.checat.2023.100550

“…Of all the options, utilising CO2 to produce renewable fuels is the most attractive pathway; by this way, the dependency on traditional fossil fuels would be decreased. The reutilisation of CO2 to produce fuels could be achieved through chemical conversion, electrochemical reduction, biological conversion and reforming processes [4,5]. Figure 1 presents a schematic drawing of solar energy utilisation for fuel production through various chemical processes, delineated into two primary sections: solar thermal and photovoltaic cells.…”

Section: Introductionmentioning

confidence: 99%

Reactor and Plant Designs for the Solar Photosynthesis of Fuels

Degerli,

Gramegna,

Tommasi

et al. 2024

Energies

1

0

View full text Add to dashboard Cite

Solar-boosted photo-technology stands out as a powerful strategy for photosynthesis and photocatalytic processes due to its minimal energy requirements, cost-effectiveness and operation under milder, environmentally friendly conditions compared to conventional thermocatalytic options. The design and development of photocatalysts have received a great deal of attention, whereas photoreactor development must be studied deeper to enable the design of efficient devices for practical exploitation. Furthermore, scale-up issues are important for this application, since light distribution through the photoreactor is a concurrent factor. This review represents a comprehensive study on the development of photoreactors to be used mainly for the photoreduction of CO2 to fuels, but with concepts easily transferable to other photosynthetic applications such as ammonia synthesis and water splitting, or wastewater treatment, photovoltaics combined to photoreactors, etc. The primary categories of photoreactors are thoroughly examined. It is also explained which parameters influence the design of a photoreactor and next-generation high-pressure photoreactors are also discussed. Last but not least, current technologies for solar concentrators are recalled, considering their possible integration within the photoreactor. While many reviews deal with photocatalytic materials, in the authors’ view, photoreactors with significant scale and their merged devices with solar concentrators are still unexploited solutions. These are the key to boost the efficiency of these processes towards commercial viability; thus, the aim of this review is to summarise the main findings on solar photoreactors for the photoreduction of CO2 and for related applications.

show abstract

Antenna Effect in Noble Metal‐Free Dye‐Sensitized Photocatalytic Systems Enhances CO₂‐to‐CO Conversion

Nikolaou,

Govind,

Balanikas

et al. 2024

Angewandte Chemie

1

0

View full text Add to dashboard Cite

Dye‐sensitized photocatalytic systems (DSPs) have been extensively investigated for solar‐driven hydrogen (H2) evolution. However, their application in carbon dioxide (CO2) reduction remains limited. Furthermore, current solar‐driven CO2‐to‐CO DSPs typically employ rhenium complexes as catalysts. In this study, we have developed DSPs that incorporate noble metal‐free components, specifically a zinc‐porphyrin as photosensitizer (PS) and a cobalt‐quaterpyridine as catalyst (CAT). Taking a significant stride forward, we have achieved an antenna effect for the first time in CO2‐to‐CO DSPs by introducing a Bodipy as an additional chromophore to enhance light harvesting efficiency. The energy transfer from Bodipy to zinc porphyrin resulted in remarkable stability (turn over number (TON) = 759 vs. CAT), and high CO evolution activity (42 mmol g‐1 h‐1vs. CAT).

show abstract

Antenna Effect in Noble Metal‐Free Dye‐Sensitized Photocatalytic Systems Enhances CO₂‐to‐CO Conversion

Nikolaou,

Govind,

Balanikas

et al. 2024

Angew Chem Int Ed

6

0

View full text Add to dashboard Cite

Dye‐sensitized photocatalytic systems (DSPs) have been extensively investigated for solar‐driven hydrogen (H2) evolution. However, their application in carbon dioxide (CO2) reduction remains limited. Furthermore, current solar‐driven CO2‐to‐CO DSPs typically employ rhenium complexes as catalysts. In this study, we have developed DSPs that incorporate noble metal‐free components, specifically a zinc‐porphyrin as photosensitizer (PS) and a cobalt‐quaterpyridine as catalyst (CAT). Taking a significant stride forward, we have achieved an antenna effect for the first time in CO2‐to‐CO DSPs by introducing a Bodipy as an additional chromophore to enhance light harvesting efficiency. The energy transfer from Bodipy to zinc porphyrin resulted in remarkable stability (turn over number (TON) = 759 vs. CAT), and high CO evolution activity (42 mmol g‐1 h‐1vs. CAT).

show abstract

Photocatalytic CO2 reduction: Photocatalysts, membrane reactors, and hybrid processes

Cited by 4 publications

References 131 publications

Reactor and Plant Designs for the Solar Photosynthesis of Fuels

Reactor and Plant Designs for the Solar Photosynthesis of Fuels

Antenna Effect in Noble Metal‐Free Dye‐Sensitized Photocatalytic Systems Enhances CO₂‐to‐CO Conversion

Antenna Effect in Noble Metal‐Free Dye‐Sensitized Photocatalytic Systems Enhances CO₂‐to‐CO Conversion

Contact Info

Product

Resources

About

Photocatalytic CO2 reduction: Photocatalysts, membrane reactors, and hybrid processes

Cited by 4 publications

References 131 publications

Reactor and Plant Designs for the Solar Photosynthesis of Fuels

Reactor and Plant Designs for the Solar Photosynthesis of Fuels

Antenna Effect in Noble Metal‐Free Dye‐Sensitized Photocatalytic Systems Enhances CO2‐to‐CO Conversion

Antenna Effect in Noble Metal‐Free Dye‐Sensitized Photocatalytic Systems Enhances CO2‐to‐CO Conversion

Contact Info

Product

Resources

About

Antenna Effect in Noble Metal‐Free Dye‐Sensitized Photocatalytic Systems Enhances CO₂‐to‐CO Conversion

Antenna Effect in Noble Metal‐Free Dye‐Sensitized Photocatalytic Systems Enhances CO₂‐to‐CO Conversion