The Chemistry of CO2 Reduction Processes: Mechanisms, Challenges, and Perspectives

Nogueira, André E.; Ribeiro, Lucas S.; Geovo, Jose D. C.; Neto, Francisco Nunes Souza; Fragal, Vanessa H.; Sequinel, Thiago; Camargo, Emerson R.; Gorup, Luiz Fernando

doi:10.1007/978-981-16-4480-1_47-1

Cited by 1 publication

(1 citation statement)

References 48 publications

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“…The effect of alkaline pH favors the availability of the CO 3 2À ion in the solution, [31,36] which reacts quickly with the abundant oxygen vacancies on the Cu surface, producing CO. This gas is quickly dimerized (COÀ CO) and protonated in subsequent steps (Figure 12), resulting in the formation of ethanol.…”

Section: Co 2 Photoreductionmentioning

confidence: 99%

CO₂ Photoreduction Product Selectivity with TiO₂−Cu Nanocatalysts under Different Reaction Media

Nascimento,

Torres,

Iga

et al. 2024

ChemCatChem

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This study explores photocatalytic conversion of CO2 using TiO2‐Cu heterojunctions with different Cu contents and investigates influence of different reaction media on the process efficiency. The use of KOH favored liquid products, especially ethanol. An analysis of H2 production as the main competitive reaction was done. Sodium oxalate led to an increase in H2 evolution by approximately 600 µmol g‐1 compared to pure water, in the presence of CO2 in the reaction medium, but the blank test (without CO2) indicates a lower H2 yield (~136 µmol g‐1), which suggests that the competitive reaction with CO2 also plays a role in H2 production. This role was related to the decrease of the initial pH from approximately 8.5 to 5.2, stabilizing at 5.5 at the end of the 6h reaction. In an environment saturated with N2, the pH increases to 9 and stabilizes at 7.8 at the end of the process. In the presence of acetic acid, both CO and H2 production were suppressed, with a significant increase in the selectivity for methane via cleavage of the acid's carbon bond. The findings underscore the importance of optimizing reaction conditions to achieve higher yields of desired products in the photocatalytic conversion of CO2.

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Section: Co 2 Photoreductionmentioning

confidence: 99%

CO₂ Photoreduction Product Selectivity with TiO₂−Cu Nanocatalysts under Different Reaction Media

Nascimento,

Torres,

Iga

et al. 2024

ChemCatChem

View full text Add to dashboard Cite

show abstract

The Chemistry of CO2 Reduction Processes: Mechanisms, Challenges, and Perspectives

Cited by 1 publication

References 48 publications

CO₂ Photoreduction Product Selectivity with TiO₂−Cu Nanocatalysts under Different Reaction Media

CO₂ Photoreduction Product Selectivity with TiO₂−Cu Nanocatalysts under Different Reaction Media

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The Chemistry of CO2 Reduction Processes: Mechanisms, Challenges, and Perspectives

Cited by 1 publication

References 48 publications

CO2 Photoreduction Product Selectivity with TiO2−Cu Nanocatalysts under Different Reaction Media

CO2 Photoreduction Product Selectivity with TiO2−Cu Nanocatalysts under Different Reaction Media

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CO₂ Photoreduction Product Selectivity with TiO₂−Cu Nanocatalysts under Different Reaction Media

CO₂ Photoreduction Product Selectivity with TiO₂−Cu Nanocatalysts under Different Reaction Media