A Tin Oxide‐Coated Copper Foam Hybridized with a Gas Diffusion Electrode for Efficient CO<sub>2</sub> Reduction to Formate with a Current Density Exceeding 1 A cm<sup>−2</sup>

Liu, Tengyi; Ohashi, Keitaro; Nagita, Kaito; Harada, Takashi; Nakanishi, Shuji; Kamiya, Kazuhide

doi:10.1002/smll.202205323

Cited by 18 publications

(8 citation statements)

References 46 publications

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“…The formate concentration value could reach 27 g L −1 (0.6 M) with a FE of 44.9% at 300 mA cm −2 . Besides, Liu et al [126] combined nano SnO-modified CuO foam with a carbon-based GDE to convert CO 2 into formate. The results showed ultrahigh rate formate production.…”

Section: Gas Diffusion Electrodes (Gdes)mentioning

confidence: 99%

“…As the homogeneously modified Sn atoms suppressed the generation of H2 and hydrophobic carbon nanoparticles on the GDE penetrated the microporous structure of the Cu foam increased the reaction area in the three-phase interface. [126] Recently, an ultrahigh current density of 2.0 A cm −2 with a formate FE of 93% at −0.95 V versus RHE has been achieved by Lin et al [127] They designed a Bi 2 S 3 -derived electrocatalyst via a solvothermal method loaded on carbon paper as GDE in a flow cell for CO 2 RR. The stability of formatting formate could maintain 100 h with an FE > 90% at an industrial-relevant current density of 250 mA cm −2 .…”

Section: Gas Diffusion Electrodes (Gdes)mentioning

confidence: 99%

“…Besides, Liu et al. [ 126 ] combined nano SnO‐modified CuO foam with a carbon‐based GDE to convert CO 2 into formate. The results showed ultrahigh rate formate production.…”

Section: Strategies For Obtaining High‐concentration Productsmentioning

confidence: 99%

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High‐Concentration Electrosynthesis of Formic Acid/Formate from CO₂: Reactor and Electrode Design Strategies

Kuang

Rabiee

et al. 2023

Energy & Environ Materials

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The electrochemical CO2 reduction reaction (CO2RR), driven by renewable energy, provides a potential carbon‐neutral avenue to convert CO2 into valuable fuels and feedstocks. Conversion of CO2 into formic acid/formate is considered one of the economical and feasible methods, owing to their high energy densities, and ease of distribution and storage. The separation of formic acid/formate from the reaction mixtures accounts for the majority of the overall CO2RR process cost, while the increment of product concentration can lead to the reduction of separation cost, remarkably. In this paper, we give an overview of recent strategies for highly concentrated formic acid/formate products in CO2RR. CO2RR is a complex process with several different products, as it has different intermediates and reaction pathways. Therefore, this review focuses on recent study strategies that can enhance targeted formic acid/formate yield, such as the all‐solid‐state reactor design to deliver a high concentration of products during the reduction of CO2 in the electrolyzer. Firstly, some novel electrolyzers are introduced as an engineering strategy to improve the concentration of the formic acid/formate and reduce the cost of downstream separations. Also, the design of planar and gas diffusion electrodes (GDEs) with the potential to deliver high‐concentration formic acid/formate in CO2RR is summarized. Finally, the existing technological challenges are highlighted, and further research recommendations to achieve high‐concentration products in CO2RR. This review can provide some inspiration for future research to further improve the product concentration and economic benefits of CO2RR.

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Section: Gas Diffusion Electrodes (Gdes)mentioning

confidence: 99%

Section: Gas Diffusion Electrodes (Gdes)mentioning

confidence: 99%

See 1 more Smart Citation

High‐Concentration Electrosynthesis of Formic Acid/Formate from CO₂: Reactor and Electrode Design Strategies

Kuang

Rabiee

et al. 2023

Energy & Environ Materials

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“…Compared with the other supports, such as the metal foams and frameworks, [ 34,36–39 ] carbon supports are smaller and more adaptable. More importantly, numerous studies have found that the outstanding performance of carbon‐supported catalysts probably arises from the interface effect between carbon supports and catalyst particles.…”

Section: Why Choose Biomass For Electrocatalysts?mentioning

confidence: 99%

Biomass‐Derived Electrocatalysts: Low‐Cost, Robust Materials for Sustainable Electrochemical Energy Conversion

Liu,

Yabu

2023

Adv Energy and Sustain Res

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Electrochemical energy conversion is an important strategy for addressing climate change and building a carbon‐neutral society. The use of inexpensive biomass resources to develop high‐performance catalytic materials that reduce the energy barrier of electrochemical reactions and minimize energy consumption has become a research hotspot for energy materials. Previous reviews have often categorized biomass‐derived catalysts by the biomass feedstocks used, but this classification method has major limitations because the roles of the same biomass material in different catalysts can vary. In this review, a new classification approach for biomass‐derived catalytic materials by focusing on the role of bio‐based materials in the overall catalyst system is proposed. The review is divided into three main sections, categorizing bio‐based materials by 1) the active components, 2) the carbon support, and 3) the entire catalyst. Additionally, a comprehensive summary is provided of catalytic materials at different scales, including the nanoscale, molecular scale, and single‐atom scale. It is hoped that this review will guide and inspire the future development of biomass‐derived electrocatalysts.

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“…[5][6][7][8] Hereby, it is urgent to develop more high performance electrocatalyst to boost the CO 2 -to-formate reduction. Heretofore, metal-based catalysts (such as Bi, [9][10][11][12] Sn, [13][14][15] In, [16][17][18] Pb, [19,20] and Pd, [21][22][23] ) present excellent formate selectivity in the eCO 2 RR process. Among them, Bi-based catalysts present the strong OCHO* stability and large hydrogen evolution overpotential, which make them be one of most promising electrocatalysts with superior performance.…”

Section: Introductionmentioning

confidence: 99%

Decrypting the Electron‐Withdrawing Effect of Au‐Decorated Bi₂O₃ for Efficient CO₂‐to‐Formate Electroreduction

Wang,

Liu

et al. 2023

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Although the electron‐withdrawing effect of gold (Au) is highlighted in catalytic reactions, its enhancement mechanism for electron transport, especially in the electrochemical process, is still unclear. Herein, Au‐decorated Bi2O3 (Au‐Bi2O3) is proposed as a proof‐of‐concept to investigate the electron‐withdrawing effect in the electrocatalytic CO2 reduction reaction (eCO2RR) process. Evidence from in situ Raman spectra and in situ XRD tests reveals that, compared to Bi2O3, Bi species in Au‐Bi2O3 can be reduced to metallic Bi more rapidly and more easily driven by the electron‐withdrawing effect of Au. The XPS tests after eCO2RR further validates the transformation from Bi3+ to Bi0 in Au‐Bi2O3 is more complete. Meanwhile, in the in situ Fourier transform infrared (FTIR) spectra, the key intermediates (CO2*− and OCHO*−) appear at the more positive potential, indicating that metallic Bi is favorable for eCO2RR due to the lower energy barrier as corroborated by density function theory (DFT) calculations. Au don't directly participate in the conversion from CO2 to formate as the reaction sites, but utilize the electron‐withdrawing effect to motivate Bi‐sites to deliver higher catalytic activity and higher selectivity to formate at a lower applied potential. This study not only has an insight into the electron‐withdrawing effect of Au on the eCO2RR process, but also develops a new perspective for engineering electron‐withdrawing effect in electrocatalysts for high‐efficient CO2‐to‐formate conversion.

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A Tin Oxide‐Coated Copper Foam Hybridized with a Gas Diffusion Electrode for Efficient CO₂ Reduction to Formate with a Current Density Exceeding 1 A cm⁻²

Cited by 18 publications

References 46 publications

High‐Concentration Electrosynthesis of Formic Acid/Formate from CO₂: Reactor and Electrode Design Strategies

High‐Concentration Electrosynthesis of Formic Acid/Formate from CO₂: Reactor and Electrode Design Strategies

Biomass‐Derived Electrocatalysts: Low‐Cost, Robust Materials for Sustainable Electrochemical Energy Conversion

Decrypting the Electron‐Withdrawing Effect of Au‐Decorated Bi₂O₃ for Efficient CO₂‐to‐Formate Electroreduction

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A Tin Oxide‐Coated Copper Foam Hybridized with a Gas Diffusion Electrode for Efficient CO2 Reduction to Formate with a Current Density Exceeding 1 A cm−2

Cited by 18 publications

References 46 publications

High‐Concentration Electrosynthesis of Formic Acid/Formate from CO2: Reactor and Electrode Design Strategies

High‐Concentration Electrosynthesis of Formic Acid/Formate from CO2: Reactor and Electrode Design Strategies

Biomass‐Derived Electrocatalysts: Low‐Cost, Robust Materials for Sustainable Electrochemical Energy Conversion

Decrypting the Electron‐Withdrawing Effect of Au‐Decorated Bi2O3 for Efficient CO2‐to‐Formate Electroreduction

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A Tin Oxide‐Coated Copper Foam Hybridized with a Gas Diffusion Electrode for Efficient CO₂ Reduction to Formate with a Current Density Exceeding 1 A cm⁻²

High‐Concentration Electrosynthesis of Formic Acid/Formate from CO₂: Reactor and Electrode Design Strategies

High‐Concentration Electrosynthesis of Formic Acid/Formate from CO₂: Reactor and Electrode Design Strategies

Decrypting the Electron‐Withdrawing Effect of Au‐Decorated Bi₂O₃ for Efficient CO₂‐to‐Formate Electroreduction