Insights into efficient transition metal-nitrogen/carbon oxygen reduction electrocatalysts

Wang, Haoyu; Weng, Chen‐Chen; Yuan, Zhong‐Yong

doi:10.1016/j.jechem.2020.08.030

Cited by 64 publications

(32 citation statements)

References 170 publications

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“…It is known that Fe‐N x active sites are primarily essential for improving the ORR activity, [58–60] whereas nickel coordinated with nitrogen (Ni‐N x ) is generally believed to be an important influencer for HER electrocatalysis [39,61] . Traditionally M−N−C type of electrocatalysts are synthesized via thermochemical conversion at an elevated temperature using precursors containing the metal and a nitrogen source such as inorganic metal salts and nitrogen sources, metal–organic framework (MOF), covalent organic framework (COF), or others.…”

Section: Resultsmentioning

confidence: 99%

Waste Face Surgical Mask Transformation into Crude Oil and Nanostructured Electrocatalysts for Fuel Cells and Electrolyzers

et al. 2021

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A novel route for the valorization of waste into valuable products was developed. Surgical masks commonly used for COVID 19 protection by stopping aerosol and droplets have been widely used, and their disposal is critical and often not properly pursued. This work intended to transform surgical masks into platinum group metal‐free electrocatalysts for oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER) as well as into crude oil. Surgical masks were subjected to controlled‐temperature and ‐atmosphere pyrolysis, and the produced char was then converted into electrocatalysts by functionalizing it with metal phthalocyanine of interest. The electrocatalytic performance characterization towards ORR and HER was carried out highlighting promising activity. At different temperatures, condensable oil fractions were acquired and thoroughly analyzed. Transformation of waste surgical masks into electrocatalysts and crude oil can open new routes for the conversion of waste into valuable products within the core of the circular economy.

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Section: Resultsmentioning

confidence: 99%

Waste Face Surgical Mask Transformation into Crude Oil and Nanostructured Electrocatalysts for Fuel Cells and Electrolyzers

et al. 2021

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“…The hierarchically porous structure tends to significantly increase the surface area, and then amplify the density of active sites and expose each active site accessible to the reactants [ 12 ]. In addition to the specific surface area, a well-developed network with interconnected fractal pore structure and continuous multiscale channels is also critical for decreasing the diffusion resistance and facilitating the mass transfer and electron transport, ultimately ensuring the continuous proceedings of the catalytic reaction [ 43 , 82 , 128 , 134 ].…”

Section: Strategies To Enhance Bifunctional Activity Of Atomically Dispersed M-n-c Catalystsmentioning

confidence: 99%

“…10 a) [ 12 , 56 , 132 ]. Micropores constitute a significant part of the specific surface area of catalysts, which can hold plentiful ORR/OER active sites [ 73 , 134 ]. Oxygen molecules can be captured by micropores, making them more effectively combined with catalytically active sites [ 12 ].…”

Section: Strategies To Enhance Bifunctional Activity Of Atomically Dispersed M-n-c Catalystsmentioning

confidence: 99%

Atomically Dispersed Transition Metal-Nitrogen-Carbon Bifunctional Oxygen Electrocatalysts for Zinc-Air Batteries: Recent Advances and Future Perspectives

et al. 2021

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Rechargeable zinc-air batteries (ZABs) are currently receiving extensive attention because of their extremely high theoretical specific energy density, low manufacturing costs, and environmental friendliness. Exploring bifunctional catalysts with high activity and stability to overcome sluggish kinetics of oxygen reduction reaction and oxygen evolution reaction is critical for the development of rechargeable ZABs. Atomically dispersed metal-nitrogen-carbon (M-N-C) catalysts possessing prominent advantages of high metal atom utilization and electrocatalytic activity are promising candidates to promote oxygen electrocatalysis. In this work, general principles for designing atomically dispersed M-N-C are reviewed. Then, strategies aiming at enhancing the bifunctional catalytic activity and stability are presented. Finally, the challenges and perspectives of M-N-C bifunctional oxygen catalysts for ZABs are outlined. It is expected that this review will provide insights into the targeted optimization of atomically dispersed M-N-C catalysts in rechargeable ZABs.

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“…1–4 The electrochemical oxygen reduction reaction (ORR) plays a pivotal role in the commercialization of these electrochemical devices. 5,6 To accelerate kinetics of the ORR occurring at the cathode, noble-metal-based electrocatalysts ( e.g. , Pt/C) with high electrocatalytic activity are commonly used as the most effective ORR electrocatalysts.…”

Section: Introductionmentioning

confidence: 99%

Synergistically enhanced iron and zinc bimetallic sites as an advanced ORR electrocatalyst for flow liquid rechargeable Zn–air batteries

et al. 2022

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Insights into efficient transition metal-nitrogen/carbon oxygen reduction electrocatalysts

Cited by 64 publications

References 170 publications

Waste Face Surgical Mask Transformation into Crude Oil and Nanostructured Electrocatalysts for Fuel Cells and Electrolyzers

Waste Face Surgical Mask Transformation into Crude Oil and Nanostructured Electrocatalysts for Fuel Cells and Electrolyzers

Atomically Dispersed Transition Metal-Nitrogen-Carbon Bifunctional Oxygen Electrocatalysts for Zinc-Air Batteries: Recent Advances and Future Perspectives

Synergistically enhanced iron and zinc bimetallic sites as an advanced ORR electrocatalyst for flow liquid rechargeable Zn–air batteries

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