Electrocatalysis in confined spaces: interplay between well-defined materials and the microenvironment

Han, Xue; Gao, Qiang; Yan, Zihao; Ji, Mengxia; Long, Christopher M.; Zhu, Huiyuan

doi:10.1039/d0nr08237f

Cited by 26 publications

(21 citation statements)

References 97 publications

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“…It is noted that the properties of fluids or gas within the nanochannels would be much different 10,46 , whereas most of the published works focus on electrocatalysts. 33,87,88 The mass transport of ions or molecules, and the property of aqueous solvent within the channel also play significant roles. 89 Comprehensive theories and in situ characterization techniques should be developed to probe the CCE and mechanism of catalysis.…”

Section: Discussionmentioning

confidence: 99%

Catalytic confinement effects in nanochannels: from biological synthesis to chemical engineering

et al. 2022

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Section: Discussionmentioning

confidence: 99%

Catalytic confinement effects in nanochannels: from biological synthesis to chemical engineering

et al. 2022

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“…[16][17][18][19] The encapsulated structure can restrict the diameter of the metal sites down to the nanometer scale, create distinct interactions between metal sites and carbon materials, and prevent metal nanoparticles from being easily etched and damaged in aqueous solution. [20] Besides the nanoscale tuning of metal active sites, the macroscale regulation of reaction interface is also vitally important for ECRR process. According to the widespread perspective, ECRR occurs on the three-phase interface of solid electrodes, liquid electrolyte, and gaseous reactants or products, where electron and reactants can gather around active sites.…”

Section: Doi: 101002/smll202104958mentioning

confidence: 99%

A Multiscale Strategy to Construct Cobalt Nanoparticles Confined within Hierarchical Carbon Nanofibers for Efficient CO₂ Electroreduction

Xie

Wang

et al. 2021

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The efficiency of CO2 electroreduction has been largely limited by the activity of the catalysts as well as the three‐phase interface. Herein, a multiscale strategy is proposed to synthesize hierarchical nanofibers covered by carbon nanotubes and embedded with cobalt nanoparticles (Co/CNT/HCNF). The confinement effect of carbon nanotubes can restrict the diameter of the cobalt particles down to several nanometers and prevent the easy corrosion of these nanoparticles. The three‐dimensional carbon nanofibers, in size range of several hundred nanometers, improve the electrochemically active surface area, facilitate electron transfer, and accelerate CO2 transportation. These cross‐linked carbon nanofibers eventually form a freestanding Co/CNT/HCNF membrane of dozens of square centimeters. Consequently, Co/CNT/HCNF produces CO with 97% faradaic efficiency at only −0.4 VRHE cathode potential in an H‐type cell. From the regulation of catalyst nanostructure to the design of macrography devices, Co/CNT/HCNF membrane can be directly used as the gas‐diffusion compartment in a flow cell device. Co/CNT/HCNF membrane generates CO with faradaic efficiencies higher than 90% and partial current densities greater than 300 mA cm−2 for at least 100‐h stability. This strategy provides a successful example of efficient catalysts for CO2 electroreduction and also has the feasibility in other self‐standing energy conversion devices.

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“…The confinement of reacting molecules in various “micro‐ or nanoflasks” generated within the reaction media is a promising technique for controlling chemical transformations. Currently, of the many examples, carbon nanotubes, [1] supramolecular assemblies, metal‐organic frameworks (MOFs), [2] stimuli‐responsive gels, [3] micelles, and other ordered materials [4] are employed as spatially confined reactors.…”

Section: Figurementioning

confidence: 99%

Nanoscale Advancement Continues—From Catalysts and Reagents to Restructuring of Reaction Media

Kashin

Ananikov

2021

Angewandte Chemie

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Comprehensive studies dedicated to the search for specific properties of matter at the micro‐ and nanoscales have greatly enriched the fields of chemistry and materials science. From the point of view of synthetic chemistry, discoveries in the field of nanoscale catalysis, in which the size effects of active centers are used to accelerate the reactions, are of particular importance. However, another approach for the promotion of chemical transformations based on the micro‐ or nanoconfinement of reacting molecules or even on the structuring of the reaction media as a whole is gaining interest as a highly valuable tool. Herein, we highlight the example of an increase in the efficiency of phenol alkylation and tert‐butylation of benzyl alcohol in reaction media based on ionic liquids by the creation of acidic microdomains in the presence of small molecule additives.

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Electrocatalysis in confined spaces: interplay between well-defined materials and the microenvironment

Abstract: In this minireview, we summarize recent advances in electrocatalysis in confined spaces. Emerging electrochemical reactions are covered and discussed.

Cited by 26 publications

References 97 publications

Catalytic confinement effects in nanochannels: from biological synthesis to chemical engineering

Catalytic confinement effects in nanochannels: from biological synthesis to chemical engineering

A Multiscale Strategy to Construct Cobalt Nanoparticles Confined within Hierarchical Carbon Nanofibers for Efficient CO₂ Electroreduction

Nanoscale Advancement Continues—From Catalysts and Reagents to Restructuring of Reaction Media

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Electrocatalysis in confined spaces: interplay between well-defined materials and the microenvironment

Abstract: In this minireview, we summarize recent advances in electrocatalysis in confined spaces. Emerging electrochemical reactions are covered and discussed.

Cited by 26 publications

References 97 publications

Catalytic confinement effects in nanochannels: from biological synthesis to chemical engineering

Catalytic confinement effects in nanochannels: from biological synthesis to chemical engineering

A Multiscale Strategy to Construct Cobalt Nanoparticles Confined within Hierarchical Carbon Nanofibers for Efficient CO2 Electroreduction

Nanoscale Advancement Continues—From Catalysts and Reagents to Restructuring of Reaction Media

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Resources

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A Multiscale Strategy to Construct Cobalt Nanoparticles Confined within Hierarchical Carbon Nanofibers for Efficient CO₂ Electroreduction