A monolithic metal-free electrocatalyst for oxygen evolution reaction and overall water splitting

Balogun, Muhammad‐Sadeeq; Qiu, Weitao; Yang, Hao; Fan, Wenjie; Huang, Yongchao; Li, Gao‐Ren; Ji, Hongbing

doi:10.1039/c6ee01930g

Cited by 190 publications

(94 citation statements)

References 36 publications

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“…In principle, the in situ growth of catalytic sites on suitable freestanding supports would be a solution to solve the existing problem in the OER system. To this end, nickel foam and carbon cloth have been explored as support materials for OER application; however, the chemical stability, conductivity and/or surface area of support materials are yet to be improved. As a matter of fact, all electrocatalytic applications have similar requirements for electrode design to the OER system, which calls for further efforts on the development of support materials and fabrication methods.…”

Section: Introductionmentioning

confidence: 99%

Scalable Fabrication of Highly Active and Durable Membrane Electrodes toward Water Oxidation

Liu

et al. 2017

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The electrocatalytic oxygen evolution reaction (OER) is a highly important reaction that requires a relatively high overpotential and determines the rate of water splitting—a process for producing hydrogen. The overall OER performance is often largely limited by uncontrollable interface when active catalysts are loaded on conductive supports, for which polymer binders are widely used, but inevitably block species transportation channels. Here, a scalable fabrication approach to freestanding graphitized carbon nanofiber networks is reported, which provides abundant sites for in situ growing Fe/Ni catalysts with the improved interface. The fabricated hybrid membrane exhibits high activity and durability toward OER, with an overpotential of 280 mV at a geometrical current density of 10 mA cm−2 and a Tafel slope of 30 mV dec−1 in alkaline medium. As implemented as a freestanding electrode, the 3D hybrid structure achieves further enhanced OER performance with an overpotential down to 215 mV at 10 mA cm−2. This work provides fresh insights into rationally fabricating OER electrocatalysts from the angle of electrode design.

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Section: Introductionmentioning

confidence: 99%

Scalable Fabrication of Highly Active and Durable Membrane Electrodes toward Water Oxidation

Liu

et al. 2017

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“…[74] It is similarb ut different to the removing of templates as introduced in the above section. [74] It is similarb ut different to the removing of templates as introduced in the above section.…”

Section: Chemical Etching To Prepare Porous Materialsmentioning

confidence: 99%

“…[74] Electromicroscopici mages showed the 3D NiD-PCC has abundant pores on the rough surface and uniform pores rooted in the soluble Ni nanoparticles. [74] Electromicroscopici mages showed the 3D NiD-PCC has abundant pores on the rough surface and uniform pores rooted in the soluble Ni nanoparticles.…”

Section: Metal-free Porous Materials For Oermentioning

confidence: 99%

Porous Materials as Highly Efficient Electrocatalysts for the Oxygen Evolution Reaction

Zhang

Cao

2018

ChemCatChem

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Carbon‐neutral hydrogen has potential to alleviate the energy crisis and ease environmental problems. Water electrolysis is a sustainable way for large‐scale hydrogen production when electricity is generated from renewable energy resources. The key challenge in water splitting is the sluggish kinetics of the oxygen evolution reaction (OER). Thus, it is important and necessary to develop highly efficient electrocatalysts in a cost‐effective way for OER. Porous materials have proven to be versatile in catalysis due to their large surface area, the fast mass diffusion, and the buffer ability of volume change. Herein, we summarize the recent progress of representative methodologies for the synthesis of porous materials toward electrocatalytic OER. The materials discussed in this Review include the cheap transition‐metal‐based (Co, Ni, and Fe) and metal‐free porous materials. This Review sheds light on the different strategies to construct catalysts with porous structures to facilitate OER.

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“…The low R ct can provide a faster OER kinetics and significantly improve the OER properties, such as lower overpotential and excellent stability. To our known, low R ct can be attributed to combining electroactive material with the conductive substratre and abundant active sites which create charge transport pathways and improve electron transport [31][32][33].…”

Section: Xrd Analysis Of Nicke-iron Alloy Filmmentioning

confidence: 99%

Preparation and Characterization of Nicke-iron Alloy Film as Freestanding Electrode for Oxygen Evolution Reaction

Yao

Chen

2018

MATEC Web Conf.

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Abstract. This work reports the porous nicke-iron alloy film supported on stainless steel mesh as freestanding electrode for enhanced oxygen evolution reaction (OER) catalyst prepared from an one step electrodeposition method. Results indicated that the porous nickle-iron alloy film exhibits a low overpotential of 270 mV at 10 mA cm −2 and excellent electroconductibility. The superior OER properties can be attributed to its novel synthetic process, conductive substrate and porous structure. This work will provide a new strategy to fabricate alloy film for OER electrocatalyst.

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A monolithic metal-free electrocatalyst for oxygen evolution reaction and overall water splitting

Abstract: Herein, a three-dimensional monolithic and metal-free N-doped porous carbon cloth electrocatalyst was fabricated.

Cited by 190 publications

References 36 publications

Scalable Fabrication of Highly Active and Durable Membrane Electrodes toward Water Oxidation

Scalable Fabrication of Highly Active and Durable Membrane Electrodes toward Water Oxidation

Porous Materials as Highly Efficient Electrocatalysts for the Oxygen Evolution Reaction

Preparation and Characterization of Nicke-iron Alloy Film as Freestanding Electrode for Oxygen Evolution Reaction

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