Nitrogen-doped flexible carbon cloth for durable metal free electrocatalyst for overall water splitting

Zhang, C.; Bhoyate, Sanket; Hyatt, M. Leon; Neria, Brooks L.; Siam, Khamis; Kahol, Pawan K.; Ghimire, Madhav; Mishra, Sanjay R.; Pérez, Felio; Gupta, Ram K.

doi:10.1016/j.surfcoat.2018.05.021

Cited by 30 publications

(11 citation statements)

References 40 publications

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“…DFT calculations revealed that the carbon atoms located at the armchair edge and adjacent to the graphitic N dopants act as the active site for the electrocatalytic reactions [ 162 ]. N-doped cotton cloth requires a low overpotential of 351 mV to deliver 10 mA cm −2 of current density with a Tafel slope of 88 mV dec −1 during the OER test, while the parental material exhibited 382 mV and Tafel was 118 mV dec −1 [ 157 ]. Another approach for the improvement of catalytic activity toward OER and catalysts stability consists in surface oxidation of the raw carbons.…”

Section: Reactivity Of Carbon-based Composite Materialsmentioning

confidence: 99%

Carbon-Based Composites as Electrocatalysts for Oxygen Evolution Reaction in Alkaline Media

et al. 2021

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This review paper presents the most recent research progress on carbon-based composite electrocatalysts for the oxygen evolution reaction (OER), which are of interest for application in low temperature water electrolyzers for hydrogen production. The reviewed materials are primarily investigated as active and stable replacements aimed at lowering the cost of the metal electrocatalysts in liquid alkaline electrolyzers as well as potential electrocatalysts for an emerging technology like alkaline exchange membrane (AEM) electrolyzers. Low temperature electrolyzer technologies are first briefly introduced and the challenges thereof are presented. The non-carbon electrocatalysts are briefly overviewed, with an emphasis on the modes of action of different active phases. The main part of the review focuses on the role of carbon–metal compound active phase interfaces with an emphasis on the synergistic and additive effects. The procedures of carbon oxidative pretreatment and an overview of metal-free carbon catalysts for OER are presented. Then, the successful synthesis protocols of composite materials are presented with a discussion on the specific catalytic activity of carbon composites with metal hydroxides/oxyhydroxides/oxides, chalcogenides, nitrides and phosphides. Finally, a summary and outlook on carbon-based composites for low temperature water electrolysis are presented.

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Section: Reactivity Of Carbon-based Composite Materialsmentioning

confidence: 99%

Carbon-Based Composites as Electrocatalysts for Oxygen Evolution Reaction in Alkaline Media

et al. 2021

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“…Electrodeposition of CoFe 2 O 4 on the CCC was carried out using the above setup, where CCC was used instead of Ni-foam as a substrate. The CCC was prepared by calcination of carbon cloth in a tube furnace at 800 • C for two hours under N 2 atmosphere (at 5 • C/min) [49]. Electrodeposition of CoFe 2 O 4 on CCC was carried out under similar conditions, but for 50 min to achieve 1.2 mg/cm 2 of the deposited material.…”

Section: Preparation Of Electrodeposited Cofe 2 O 4 Electrodesmentioning

confidence: 99%

Electrodeposited Nanostructured CoFe2O4 for Overall Water Splitting and Supercapacitor Applications

et al. 2019

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To contribute to solving global energy problems, a multifunctional CoFe 2 O 4 spinel was synthesized and used as a catalyst for overall water splitting and as an electrode material for supercapacitors. The ultra-fast one-step electrodeposition of CoFe 2 O 4 over conducting substrates provides an economic pathway to high-performance energy devices. Electrodeposited CoFe 2 O 4 on Ni-foam showed a low overpotential of 270 mV and a Tafel slope of 31 mV/dec. The results indicated a higher conductivity for electrodeposited compared with dip-coated CoFe 2 O 4 with enhanced device performance. Moreover, bending and chronoamperometry studies suggest excellent durability of the catalytic electrode for long-term use. The energy storage behavior of CoFe 2 O 4 showed high specific capacitance of 768 F/g at a current density of 0.5 A/g and maintained about 80% retention after 10,000 cycles. These results demonstrate the competitiveness and multifunctional applicability of the CoFe 2 O 4 spinel to be used for energy generation and storage devices.

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“…Recently, another N‐doped bifunctional catalyst was reported by Zhang et al for water splitting. [ 126 ] The cotton textile was first transformed into carbonized cloth in N 2 , which was then dipped in PAN solution as a source of nitrogen, followed by a second carbonization process in N 2 . This carbon cloth showed an OER overpotential of 351 mV at current density of 10 mA cm −2 .…”

Section: Oxygen Electrocatalysts Derived From Fibrous Organic Sourcesmentioning

confidence: 99%

Fibrous‐Structured Freestanding Electrodes for Oxygen Electrocatalysis

Jiang

Fang

et al. 2019

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Electrocatalysts used for oxygen reduction and oxygen evolution reactions are critical materials in many renewable‐energy devices, such as rechargeable metal–air batteries, regenerative fuel cells, and water‐splitting systems. Compared with conventional electrodes made from catalyst powders, oxygen electrodes with a freestanding architecture are highly desirable because of their binder‐free fabrication and effective elimination of catalyst agglomeration. Among all freestanding electrode structures that have been investigated so far, fibrous materials exhibit many unique advantages, such as a wide range of available fibers, low material and material‐processing costs, large specific surface area, highly porous structure, and simplicity of fiber functionalization. Recent advances in the use of fibrous structures for freestanding electrocatalytic oxygen electrodes are summarized, including electrospun nanofibers, bacterial cellulose, cellulose fibrous structures, carbon clothes/papers, metal nanowires, and metal meshes. After detailed discussion of common techniques for oxygen electrode evaluation, freestanding electrode fabrication, and their electrocatalytic performance, current challenges and future prospects are also presented for future development.

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Nitrogen-doped flexible carbon cloth for durable metal free electrocatalyst for overall water splitting

Cited by 30 publications

References 40 publications

Carbon-Based Composites as Electrocatalysts for Oxygen Evolution Reaction in Alkaline Media

Carbon-Based Composites as Electrocatalysts for Oxygen Evolution Reaction in Alkaline Media

Electrodeposited Nanostructured CoFe2O4 for Overall Water Splitting and Supercapacitor Applications

Fibrous‐Structured Freestanding Electrodes for Oxygen Electrocatalysis

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