Addressing challenges for operating electrochemical solar fuels technologies under variable and diurnal conditions DOI Creative Commons
Kyra M. K. Yap, Sol A Lee, Tobias A. Kistler

et al.

Frontiers in Energy Research, Journal Year: 2024, Volume and Issue: 12

Published: Oct. 16, 2024

The outdoor operation of electrochemical solar fuels devices must contend with challenges presented by the cycles irradiance, temperature, and other meteorological factors. Herein, we discuss associated these fluctuations over three timescales, including effects diurnal cycling course many days, a single cycle hours, phenomena that cause on order seconds to minutes. We also highlight both reaction-independent reaction-specific variable conditions for hydrogen evolution reaction CO 2 reduction reaction. identify key areas research advancing technology need metrics benchmarks enable comparison studies across systems geographical locations.

Language: Английский

Tandem Routes for Converting Carbon Dioxide to High-Value Hydrocarbons: The Roads to Renewable Chemicals and Fuels DOI
Mi Gyoung Lee‬

Chemistry of Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 22, 2025

Language: Английский

Citations

0
A photothermocatalytic reactor and selective solar absorber for sustainable fuel synthesis DOI
Magel P. Su, Aisulu Aitbekova,

Matthew Salazar

et al.

Device, Journal Year: 2024, Volume and Issue: unknown, P. 100604 - 100604

Published: Nov. 1, 2024

Language: Английский

Citations

2
Controlling Product Selectivity in Photochemical CO2 Reduction with the Redox Potential of the Photosensitizer DOI
Lei Zhang, Andressa V. Müller, Sai Puneet Desai

et al.

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(24), P. 18477 - 18487

Published: Dec. 3, 2024

The ability to selectively reduce CO2 a particular product or mixture of products is expected play key role in mitigation strategies aiming alleviate the devastating impact this greenhouse gas our climate and oceans. Among those, production liquid solar fuels from H2O will likely need cascade involving multiple catalysts carrying out different functions. This require that doing initial reduction steps deliver right downstream catalysts. CO, H2 formate are most common by molecular In work, we demonstrate control over selectivity C1 photochemical with same catalyst, simply changing redox potential photosensitizer and/or water concentration. Turnover numbers for CO generation one photosensitizers under anhydrous conditions reached 85,000, largest values reported date. A combination experimental results DFT calculations show achieved, part, due interplay between regimes kinetic thermodynamic control. These largely dictated proton sources byproducts generated.

Language: Английский

Citations

2
Realization of a Photoelectrochemical Cascade for the Generation of Methanol: A Liquid Solar Fuel DOI Creative Commons
Thomas Chan, Calton J. Kong, Grace A. Rome

et al.

Energy & Fuels, Journal Year: 2024, Volume and Issue: 39(8), P. 4019 - 4029

Published: Dec. 23, 2024

Biochemical networks use reaction cascades to selectively reduce CO2 using energy from sunlight, but can similar selectivity be achieved by applying a cascade approach an engineered system? Here, we report the design and implementation of two-step photoelectrochemical (PEC) liquid solar fuel: reduction CO subsequent methanol. The potentials required perform reductions were generated custom-made III-V-based three-terminal tandem (3TT) cells. Cobalt phthalocyanine immobilized on multiwalled carbon nanotubes (CoPc/MWCNT) catalyzed both reactions. Multiphysics simulations electrolyte flow nonilluminated electrochemical measurements used narrow operating parameters for CoPc/MWCNT 3TT photocathodes. champion integrated photocathode produced methanol with 3.8 ± 0.4% Faradaic efficiency (FE), tested photocathodes having 0.7-3.8% FE. Products quantified nuclear magnetic resonance spectroscopy gas chromatography. current output was highly stable, production continued over multiple experiments. low yield is attributed insufficient flux to, depletion at, methanol-producing subcell when contacts are active, which supported observation that control photoelectrode slightly outperformed device. Methanol ceased driving deactivated, supporting assignment mechanism. major factors resulting in FE at contact uncertainty potential selection design. Although not yet selective, this work develops basic science principles underlying PEC cascade, demonstrates co-design 3TT-based produce carbon-based fuels, finally discusses routes improving product yields concept, including supply optimization alternative catalyst materials.

Language: Английский

Citations

0
Addressing challenges for operating electrochemical solar fuels technologies under variable and diurnal conditions DOI Creative Commons
Kyra M. K. Yap, Sol A Lee, Tobias A. Kistler

et al.

Frontiers in Energy Research, Journal Year: 2024, Volume and Issue: 12

Published: Oct. 16, 2024

The outdoor operation of electrochemical solar fuels devices must contend with challenges presented by the cycles irradiance, temperature, and other meteorological factors. Herein, we discuss associated these fluctuations over three timescales, including effects diurnal cycling course many days, a single cycle hours, phenomena that cause on order seconds to minutes. We also highlight both reaction-independent reaction-specific variable conditions for hydrogen evolution reaction CO 2 reduction reaction. identify key areas research advancing technology need metrics benchmarks enable comparison studies across systems geographical locations.

Language: Английский

Citations

0