Electrocatalytic CO2 reduction in acidic medium

Review Chemistry, Multidisciplinary

Solar fuels: research and development strategies to accelerate photocatalytic CO2 conversion into hydrocarbon fuels

Eunhee Gong et al.

Summary: This review highlights recent advances, challenges, and potential solutions in photocatalytic production of solar fuels from CO2, including discussions on various catalysts and reaction mechanisms.

ENERGY & ENVIRONMENTAL SCIENCE (2022)

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Article Chemistry, Physical

Engineering the Local Microenvironment over Bi Nanosheets for Highly Selective Electrocatalytic Conversion of CO2 to HCOOH in Strong Acid

Yan Qiao et al.

Summary: Introducing K+ cations into a strong acid electrolyte enables efficient CO2 reduction reaction, resulting in high current efficiency and carbon efficiency for HCOOH production, surpassing alkaline electrolyte.

ACS CATALYSIS (2022)

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Article Chemistry, Multidisciplinary

Electronic Regulation of Nickel Single Atoms by Confined Nickel Nanoparticles for Energy-Efficient CO2 Electroreduction

Wenhao Ren et al.

Summary: The researchers prepared a nickel single-atom/nanoparticle catalyst through direct solid-state pyrolysis, which exhibited high CO current density in an alkaline flow cell. Coupled with a nickel-iron anode in a zero-gap membrane electrolyzer, the catalyst achieved industrially relevant CO current density and low cell voltage, demonstrating a high overall energy efficiency.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2022)

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Article Multidisciplinary Sciences

Electrochemical CO2 reduction to ethylene by ultrathin CuO nanoplate arrays

Wei Liu et al.

Summary: In this study, a facile and scalable anodic corrosion method was used to synthesize oxygen-rich CuO nanoplate arrays. The self-evolution process led to the formation of stable Cu/Cu2O heterogeneous interfaces, which significantly improved the C2H4 production and stability in CO2 electroreduction.

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, 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

High carbon utilization in CO2 reduction to multi-carbon products in acidic media

Yi Xie et al.

Summary: Renewable electricity-powered CO2 reduction to multi-carbon (C2+) products is a promising route for low-carbon-footprint fuels and chemicals. Acidic conditions offer a solution to the consumption of input CO2 by the electrolyte, but also promote the hydrogen evolution reaction. This study presents a design strategy that suppresses the activity of hydrogen evolution reaction by maximizing the co-adsorption of CO and CO2 on Cu-based catalysts.

NATURE CATALYSIS (2022)

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Article Chemistry, Physical

Electrocatalytic carbon dioxide reduction in acid

Junnan Li et al.

Summary: The conversion of CO2 driven by renewable energy is an important way to generate carbon-based fuels and chemicals for a sustainable society. Although most CO2 reduction (CO2R) processes are carried out in alkaline electrolyte, this often leads to spontaneous formation of carbonates, resulting in low energy balance and CO2 utilization rate. Operating in acid conditions can alleviate these issues, but achieving selective CO2R in the presence of high proton concentrations has been a challenge. Recent studies have made progress in demonstrating the potential of CO2R in acid environments. Future research should address the remaining key questions to make acid-based CO2R practical.

CHEM CATALYSIS (2022)

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Review Chemistry, Multidisciplinary

Advances and Challenges for the Electrochemical Reduction of CO2 to CO: From Fundamentals to Industrialization

Song Jin et al.

Summary: The electrochemical carbon dioxide reduction reaction is an important pathway for converting renewable electricity into fuels and feedstocks, with the conversion of CO2 into CO being a promising reaction. Advancements in catalyst and electrolyte design, along with understanding the catalytic mechanism, are crucial for promoting the technology towards industrial implementation. However, there are still challenges and future directions for the industrial application of this technology.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

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Editorial Material Chemistry, Physical

Address the alkalinity problem'' in CO2 electrolysis with catalyst design and translation

Chubai Chen et al.

JOULE (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

Efficiency and selectivity of CO2 reduction to CO on gold gas diffusion electrodes in acidic media

Mariana C. O. Monteiro et al.

Summary: Large scale CO2 electrolysis to produce CO has traditionally been done in neutral and alkaline media, but recent research shows that it can also be achieved in acidic media with higher efficiency. Operating at current densities up to 200 mA cm(-2), CO faradaic efficiencies between 80-90% were obtained in sulfate electrolyte, representing a step towards the application of acidic electrolyzers for CO2 electroreduction.

NATURE COMMUNICATIONS (2021)

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Article Chemistry, Physical

Absence of CO2 electroreduction on copper, gold and silver electrodes without metal cations in solution

Mariana C. O. Monteiro et al.

Summary: The study found that metal cations play a crucial role in stabilizing the CO2 intermediate during the reduction process on gold electrodes. Density functional theory simulations confirmed that partially desolvated metal cations enable the reduction by stabilizing the CO2- intermediate through short-range electrostatic interactions. In conclusion, the positively charged species from the electrolyte are key to stabilizing the crucial reaction intermediate.

NATURE CATALYSIS (2021)

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Review Chemistry, Physical

Stability challenges of electrocatalytic oxygen evolution reaction: From mechanistic understanding to reactor design

Feng-Yang Chen et al.

Summary: This review summarizes critical mechanisms that could influence the stability of the oxygen evolution reaction (OER) and discusses the importance of stability in large-scale electrolysis industrialization. Additionally, it provides catalyst and reactor design principles for overcoming OER stability challenges.

JOULE (2021)

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Review Chemistry, Multidisciplinary

Electrocatalytic reduction of CO2 and CO to multi-carbon compounds over Cu-based catalysts

Wenchao Ma et al.

Summary: This tutorial review explores the electrocatalytic reduction of CO2 with H2O to multi-carbon (C2+) compounds, focusing on the similarities and differences in the electrocatalytic CO2 and CO reduction reactions (CO2RR and CORR) into C2+ compounds over Cu-based catalysts. It discusses fundamental aspects, reaction mechanisms, efficient catalysts, and key factors determining selectivity, activity, and stability. Opportunities, challenges, and future trends in the electrocatalytic CO2RR and CORR are also highlighted for the synthesis of C2+ olefins and oxygenates.

CHEMICAL SOCIETY REVIEWS (2021)

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Article Chemistry, Multidisciplinary

Bifunctional single-molecular heterojunction enables completely selective CO2-to-CO conversion integrated with oxidative 3D nano-polymerization

Dong-Dong Ma et al.

Summary: This study designs a bifunctional electrocatalyst for integrating CO2 reduction and anodic non-classical reaction, achieving efficient product generation. By anchoring a novel nickel phthalocyanine molecule onto carbon nanotubes at the single-molecule level, high CO2 conversion efficiency and stability are achieved. Furthermore, the development of an electrolytic system combining CO2 reduction with oxidative nano-polymerization is also highlighted.

ENERGY & ENVIRONMENTAL SCIENCE (2021)

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Article Multidisciplinary Sciences