Increasing levels of carbon dioxide (CO2) due to natural and anthropogenic activities have led to alarming concerns of global warming. Photocatalytic conversion of CO2 to formic acid (FA) is speculated to provide a long-term solution for CO2 remediation and the production of green energy. Herein, we report the conversion method of CO2 to FA using water, light, and organic RRR catalyst at room temperature in a photocatalytic RK-X reactor. A total of seven experiments were conducted and observed to study the effectiveness of the reaction. The experiments achieved 8.47 g/L of FA concentrate. This photocatalytic conversion of CO2 into FA represents a promising approach to addressing global warming and providing carbon negative hydrogen as an answer to fossil fuel problems. Another possible application of this study is to provide sustainable energy on Mars, where water, light, and CO2 are all available for the reaction.
ParaschivSParaschivLS. Trends of carbon dioxide (CO2) emissions from fossil fuels combustion (coal, gas and oil) in the EU member states from 1960 to 2018. Energy Rep2020; 6: 237–242.
AkhterPFarkhondehfalMAHernándezS, et al.Environmental issues regarding CO2 and recent strategies for alternative fuels through photocatalytic reduction with titania-based materials. J Environ Chem Eng2016; 4: 3934–3953.
7.
National Research Council, et al.Carbon management: implications for R&D in the chemical sciences and technology. Washington, DC: National Academic Press, 2001. DOI: https://doi.org/10.17226/10153.
8.
HussainMAkhterPSaraccoGRussoN. Nanostructured TiO2/KIT-6 catalysts for improved photocatalytic reduction of CO2 to tunable energy products. Appl Catal B: Environ2015; 170: 53–65.
9.
AkhterPHussainMSaraccoG,et al.Novel nanostructured-TiO2 materials for the photocatalytic reduction of CO2 greenhouse gas to hydrocarbons and syngas. Fuel2015; 149: 55–65.
10.
HussainMAkhterPRussoN,et al.New optimized mesoporous silica incorporated isolated Ti materials towards improved photocatalytic reduction of carbon dioxide to renewable fuels. Chem Eng J2015; 278: 279–292.
11.
SanniSEAlabaPAOkoroE, et al.Strategic examination of the classical catalysis of formic acid decomposition for intermittent hydrogen production, storage and supply: A review. Sustain Energy Technol Assess2021; 45: 101078.
NakadaAKoikeKNakashimaT, et al.Inorg Chem2015; 54: 1800–1807.
18.
KamadaKJungJWakabayashiT, et al.J Am Chem Soc2020; 142: 10261–10266.
19.
IshibashiTIkeyamaSItoM, et al.Chem Lett2018; 47: 1505–1508.
20.
WangHChengSCaiX, et al.Photocatalytic CO2 reduction to HCOOH over core-shell Cu@Cu2O catalysts. Catal Commun2022; 162: 106372.
21.
MoretSDysonPJLaurenczyG. Direct synthesis of formic acid from carbon dioxide by hydrogenation in acidic media. Nat Commun2014; 5: 1–7.
22.
NaharSZainMFKadhumAA, et al.Advances in photocatalytic CO2 reduction with water: A review. Materials2017; 10: 629.
23.
MihetMDanMBarbu-TudoranL, et al.Controllable H2 generation by formic acid decomposition on a novel Pd/Templated carbon catalyst. Hydrogen2020; 1: 22–37.
24.
MirandaPE. Science and engineering of hydrogen-based energy technologies. New York: Elsevier Science, 2018.
25.
AmourouxJSiffertPMassuéJP, et al.Carbon dioxide: A new material for energy storage. Prog Nat Sci: Mater Int2014; 24: 295–304.
26.
JakoskyBMEdwardsCS. Inventory of CO2 available for terraforming Mars. Nat Astron2018; 2: 634–639.
27.
de KleijneKHanssenSVvan DinterenL, et al.Limits to Paris compatibility of CO2 capture and utilization. One Earth2022; 5: 168–185.
