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Production of Liquid Solar Fuels and Their Use in Fuel Cells

Title
Production of Liquid Solar Fuels and Their Use in Fuel Cells
Authors
Fukuzumi S.
Ewha Authors
Shunichi Fukuzumi
SCOPUS Author ID
Shunichi Fukuzumiscopus
Issue Date
2017
Journal Title
Joule
ISSN
2542-4351JCR Link
Citation
Joule vol. 1, no. 4, pp. 689 - 738
Keywords
artificial photosynthesischarge separationdirect liquid fuel cellselectron transferfuel cellshydrogen peroxidehydrogen storageliquid solar fuelsphotocatalytic production of solar fuelsreduction of carbon dioxideutilization of seawater
Publisher
Cell Press
Indexed
SCOPUS scopus
Document Type
Review
Abstract
This review focuses on the production of liquid fuels using solar energy combined with their use in direct liquid fuel cells. The production of formic acid, which is the two-electron reduced product of CO2, as a solar liquid fuel as well as a hydrogen storage material is discussed together with its use in direct formate fuel cells. Other CO2 reduction products such as methanol and formaldehyde as solar liquid fuels as well as hydrogen storage materials are reviewed with the performance of the corresponding fuel cells. The production of nitrogen fixation products such as ammonia and hydrazine is also reviewed together with their fuel cells. Finally, the production of hydrogen peroxide from not only pure water but also seawater and dioxygen in the air using solar energy is discussed and combined with the recent development of one-compartment hydrogen peroxide fuel cells. As the concerns increase worldwide on rapid depletion of fossil fuels, the resulting global warming, climate change, and environmental damage by consumption of fossil fuels, conversion of solar energy into easily storable chemical energy such as liquid fuels and their use in liquid fuel cells have attracted more and more attention as the key technologies to ensure a stable supply of energy as renewable alternatives to fossil fuels. This review focuses on the production of liquid fuels using solar energy, so-called solar liquid fuels, combined with their use in direct liquid fuel cells. First, the production of formic acid, which is the two-electron reduced product of CO2, as a solar liquid fuel as well as a hydrogen storage material is discussed together with its use in direct formic acid and formate fuel cells. Then, other CO2 reduction products such as methanol and formaldehyde as solar fuels as well as hydrogen storage materials and the performance of the corresponding fuel cells are reviewed. The production of nitrogen fixation products such as ammonia and hydrazine is also reviewed together with the ammonia and hydrazine fuel cells. Finally, the production of hydrogen peroxide from not only from water but also seawater, which is the most earth-abundant material, and dioxygen in the air using solar energy is discussed along with the recent development of one-compartment hydrogen peroxide fuel cells without membrane. All the liquid fuels discussed in this review have both merits and demerits in terms of energy density, storage, toxicity, and safety for their production and their use in liquid fuel cells. In each case, development of more efficient and selective catalysts for both solar-light-driven production of liquid fuels and their use in liquid fuel cells is required to establish an energy-sustainable society with no global warming and no depletion of fossil fuels. The production of liquid fuels such as hydrogen peroxide from not only from water but also seawater, which is the most earth-abundant material, and dioxygen in the air using solar energy is combined with the recent development of one-compartment liquid fuel cells for an energy-sustainable society with no global warming and no depletion of fossil fuels. © 2017
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DOI
10.1016/j.joule.2017.07.007
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자연과학대학 > 화학·나노과학전공 > Journal papers
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