A carbon-efficient bicarbonate electrolyzer

Article Chemistry, Physical

CO2 electroreduction to multicarbon products from carbonate capture liquid

Geonhui Lee et al.

Summary: This study presents a method for direct electrochemical conversion of CO2 captured as carbonate into multicarbon (C2+) products, eliminating the need for energy to regenerate lost CO2.

JOULE (2023)

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Review Energy & Fuels

Gas diffusion electrodes, reactor designs and key metrics of low-temperature CO2 electrolysers

David Wakerley et al.

Summary: Chemicals and fuels can be generated from CO2 via electrolysers that employ gas diffusion electrodes. This review discusses the key advances and remaining shortfalls of GDE-based CO2 electrolysers, as well as provides an overview of partial current densities, efficiencies, and stabilities achieved.

NATURE ENERGY (2022)

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Article Multidisciplinary Sciences

Low energy carbon capture via electrochemically induced pH swing with electrochemical rebalancing

Shijian Jin et al.

Summary: This work presents a safe and scalable electrochemical method for CO2 separation with low energy cost. By utilizing proton-coupled electron transfer of DSPZ molecules, CO2 absorption and release can be achieved effectively. The results show promising potential for practical application in the future.

NATURE COMMUNICATIONS (2022)

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Review Nanoscience & Nanotechnology

Gas diffusion electrodes and membranes for CO2 reduction electrolysers

Eric W. Lees et al.

Summary: This review explores material design strategies for controlling the transport of products and reactants in electrochemical reactors that convert CO2 emissions into chemicals and fuels, focusing on the design and development of gas diffusion electrodes (GDEs) and polymer electrolyte membranes tailored for the CO2 reduction reaction (CO2RR).

NATURE REVIEWS MATERIALS (2022)

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Article Chemistry, Multidisciplinary

Conversion of Reactive Carbon Solutions into CO at Low Voltage and High Carbon Efficiency

Zishuai Zhang et al.

Summary: An electrolyzer capable of reducing CO2 into CO at a high rate and efficiency is developed by using a reactive carbon solution, a cation exchange membrane, and the hydrogen oxidation reaction. This study highlights the importance of feedstock, membrane, and anode chemistries in converting CO2 into products.

ACS CENTRAL SCIENCE (2022)

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Article Chemistry, Physical

Electrolytic Methane Production fromReactive Carbon Solutions

Eric W. Lees et al.

Summary: We report the development of an electrochemical reactor that can convert 3.0 M KHCO3 into methane, achieving a methane yield of 34%, compared to the previously reported highest yield of 3%. The reactor utilizes a reactive carbon solution and a cationic surfactant in the catholyte to suppress hydrogen evolution and increase methane formation. Furthermore, a 1D continuum model confirms the significant role of H+ transported by a bipolar membrane in promoting methane formation over multicarbon products. These findings provide important design principles for electrochemical methane synthesis.

ACS ENERGY LETTERS (2022)

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Article Chemistry, Physical

Modulating electric field distribution by alkali cations for CO2 electroreduction in strongly acidic medium

Jun Gu et al.

Summary: This study demonstrates that efficient CO2 electroreduction can be achieved in acidic medium by suppressing hydrogen evolution using alkali cations, overcoming the limitations caused by carbonate formation. The effects of cations are applicable to various catalysts and are achieved by modifying the electric field distribution and stabilizing key intermediates.

NATURE CATALYSIS (2022)

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Article Chemistry, Physical

Recovering carbon losses in CO2 electrolysis using a solid electrolyte reactor

Jung Yoon 'Timothy' Kim et al.

Summary: This study introduces a porous solid electrolyte reactor strategy to efficiently recover crossover CO2 in traditional CO2 electrolysers, achieving high CO recovery rate and CO Faradaic efficiency under high current conditions by utilizing a sulfonated polymer electrolyte as a buffer layer.

NATURE CATALYSIS (2022)

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Editorial Material Chemistry, Physical

Don't cross the streams

Sarah Lamaison et al.

Summary: Low-temperature CO2 electrolysis has gained increasing attention for the production of sustainable electrofuels and electrochemicals. Recent advancements in system engineering have tackled downstream purification challenges, bringing this technology closer to maturity.

NATURE CATALYSIS (2022)

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Article Energy & Fuels

Continuous CO2 electrolysis using a CO2 exsolution-induced flow cell

Guobin Wen et al.

Summary: This study designs a CO2 electrolyser that addresses the limitation of poor reactant and product transfer by using forced convection of the catholyte. This method allows high current densities to be reached.

NATURE ENERGY (2022)

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Article Chemistry, Multidisciplinary

Ultra salt-resistant solar desalination system via large-scale easy assembly of microstructural units

Chenyang Dang et al.

Summary: The research team addressed the issue of salt accumulation in solar desalination systems by utilizing the easy assembly of microstructural units, proposing a solution for large-scale manufacturing of salt-resistant systems. The resulting system showed high energy efficiency and stability, offering a low-cost method for freshwater production.

ENERGY & ENVIRONMENTAL SCIENCE (2022)

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Article Energy & Fuels

Evaluation of Formate Salt PCM's for Latent Heat Thermal Energy Storage

Samuel Gage et al.

Summary: The study explores the potential use of formate salts as PCMs for thermal energy storage, highlighting the importance of stability and protection against oxidation. Experimental results showed that sodium formate and sodium/potassium formate exhibited good stability, while sodium/calcium formate showed a decrease in heat of fusion. It is crucial to protect formate from atmospheric exposure to maintain its integrity when used as a PCM.

ENERGIES (2021)

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Review Energy & Fuels

Designing anion exchange membranes for CO2 electrolysers

Danielle A. Salvatore et al.

Summary: New technologies are needed to efficiently convert carbon dioxide into fuels and chemicals at near-ambient temperatures and pressures. Anion exchange membranes in zero-gap reactors show promise for mediating the electrochemical CO2 reduction reaction, but challenges remain in tailoring these membranes to meet the requirements of CO2RR systems.

NATURE ENERGY (2021)

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Review Humanities, Multidisciplinary

The formation of formates: a review of metal formates on heritage objects

Gerhard Eggert et al.

Summary: Metal formates, degradation products on heritage objects, are related to alkaline surfaces and constitute irreversible damage. Preventive conservation is required to remove all sources of carbonyl pollutants in order to avoid such corrosion.

HERITAGE SCIENCE (2021)

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Article Chemistry, Physical

Coupling electrochemical CO2 conversion with CO2 capture

Ian Sullivan et al.

Summary: Electrochemical CO2 conversion into fuels or chemicals and CO2 capture from point or dilute sources are two important processes to address the gigaton challenges in reducing greenhouse gas emissions. Both processes are energy intensive, but synergistic coupling between them can improve energy efficiency and reduce costs, by eliminating the need for CO2 transport and storage or capture media regeneration.

NATURE CATALYSIS (2021)

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Article Electrochemistry

Impact of Alkali Cation Identity on the Conversion of HCO3- to CO in Bicarbonate Electrolyzers

Arthur G. Fink et al.

Summary: This study demonstrates the impact of electrolyte cation identity on the product selectivity of bicarbonate electrolysis, showing that different cations affect the rate of CO2 electroreduction to CO. Optimizing the electrolyte composition can enhance the selectivity of CO product.

CHEMELECTROCHEM (2021)

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Article Chemistry, Multidisciplinary

Alkalinity Concentration Swing for Direct Air Capture of Carbon Dioxide

Anatoly Rinberg et al.

Summary: The alkalinity concentration swing (ACS) is a new process for direct air capture of carbon dioxide. It involves concentrating alkaline solution loaded with dissolved inorganic carbon to increase CO2 partial pressure for extraction. Energy models show ACS compares favorably to other approaches in capturing one million tonnes of CO2 per year with lower energy requirements.

CHEMSUSCHEM (2021)

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Article Geosciences, Multidisciplinary

Potential CO2 removal from enhanced weathering by ecosystem responses to powdered rock

Daniel S. Goll et al.

Summary: Simulations suggest that vegetation's enhanced CO2 uptake from powdered rock can be a feasible option in mitigating climate change, with enhanced weathering being a potential negative emission technology. Amending soil with powdered basalt may effectively enhance ecosystem carbon storage, but scaling up and addressing potential side effects are necessary.

NATURE GEOSCIENCE (2021)

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Article Multidisciplinary Sciences

CO2 electrolysis to multicarbon products in strong acid

Jianan Erick Huang et al.

Summary: Carbon dioxide electroreduction (CO2R) is being actively studied as a promising route to convert carbon emissions to valuable chemicals and fuels. A study found that concentrating potassium cations in the vicinity of electrochemically active sites accelerates CO2 activation to enable efficient CO2R in acid. The research achieved a high CO2R efficiency on copper at pH <1 with a single-pass CO2 utilization of 77%.

SCIENCE (2021)

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Article Multidisciplinary Sciences