Enhancement of PGM-free oxygen reduction electrocatalyst performance for conventional and enzymatic fuel cells: The influence of an external magnetic field

Kiciński, Wojciech; Sęk, Jakub P.; Matysiak-Brynda, Edyta; Miecznikowski, Krzysztof; Donten, Mikołaj; Budner, Bogusław; Nowicka, Anna M.

doi:10.1016/j.apcatb.2019.117955

Cited by 26 publications

(20 citation statements)

References 56 publications

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“…10,11 However, a comprehensive understanding of the magnetic eld-enhanced mechanism is still lacking, thus prohibiting taking its advantage to design and fabricate high-performance catalysts for advanced energy technologies. Currently, theoretical insights into the magnetic eld-enhanced OER mainly focus on the magnetothermal effect, 12,13 spin-polarized effect, 7,14,15 and electron energy state enhancement effect. 16 Directly or indirectly, these effects can change the overall OER performance by improving the surface temperature of the catalyst, adsorption thermodynamic features of reactants and intermediates, and/or electron transfer process.…”

Section: Introductionmentioning

confidence: 99%

Magnetic field assisted electrocatalytic oxygen evolution reaction of nickel-based materials

Zhang

Guo

et al. 2022

J. Mater. Chem. A

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Section: Introductionmentioning

confidence: 99%

Magnetic field assisted electrocatalytic oxygen evolution reaction of nickel-based materials

Zhang

Guo

et al. 2022

J. Mater. Chem. A

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“…B²)], convection should arise in region of non-uniform concentration if the concentration gradient is perpendicular to the magnetic field gradient, thereby thinning the diffusion layer and enhancing mass-transfer,as for the MHD effect[30]. Using field gradient near the working electrode (WE) surface with…”

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confidence: 99%

Use of magnetic fields in electrochemistry: A selected review

Gatard

Deseure

Chatenet

2020

Current Opinion in Electrochemistry

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Electrochemical reactions are usually thermally-activated and submitted to masstransfer effects. Although classically, enhanced kinetics of an electrochemical reaction is obtained by heating the cell and feeding the reactant by forced convection, other means can be used to improve mass-and charge-transfer. This paper shortly reviews the effects of magnetic fields in electrochemistry. Using a static or an alternating magnetic field enables to enhance electrodeposition and electrocatalysis, via improved gas and species convection, electrochemical kinetics and whole reaction efficiency. Such enhancement can mainly be related to Lorentz and Kelvin forces, magneto-hydrodynamics (MHD), chiral-induced spin selectivity (CISS) and hyperthermia, these effects being described herein.

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“…This method could also simplify the computational process, as no random structures are involved. Kiciński et al [120] introduced a permanent magnet to the ORR test system to provide an external magnetic field (Figure 15). This method was proven effective to increase activity and boost the 4e − pathway, as the catalytic performance of Fe-N-C/S was obviously enhanced with an applied magnetic field in the test.…”

Section: Types Of Metalmentioning

confidence: 99%

Recent Advances in Non-Precious Transition Metal/Nitrogen-doped Carbon for Oxygen Reduction Electrocatalysts in PEMFCs

Song

Sha

et al. 2020

Catalysts

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The proton exchange membrane fuel cells (PEMFCs) have been considered as promising future energy conversion devices, and have attracted immense scientific attention due to their high efficiency and environmental friendliness. Nevertheless, the practical application of PEMFCs has been seriously restricted by high cost, low earth abundance and the poor poisoning tolerance of the precious Pt-based oxygen reduction reaction (ORR) catalysts. Noble-metal-free transition metal/nitrogen-doped carbon (M–NxC) catalysts have been proven as one of the most promising substitutes for precious metal catalysts, due to their low costs and high catalytic performance. In this review, we summarize the development of M–NxC catalysts, including the previous non-pyrolyzed and pyrolyzed transition metal macrocyclic compounds, and recent developed M–NxC catalysts, among which the Fe–NxC and Co–NxC catalysts have gained our special attention. The possible catalytic active sites of M–NxC catalysts towards the ORR are also analyzed here. This review aims to provide some guidelines towards the design and structural regulation of non-precious M–NxC catalysts via identifying real active sites, and thus, enhancing their ORR electrocatalytic performance.

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Enhancement of PGM-free oxygen reduction electrocatalyst performance for conventional and enzymatic fuel cells: The influence of an external magnetic field

Cited by 26 publications

References 56 publications

Magnetic field assisted electrocatalytic oxygen evolution reaction of nickel-based materials

Magnetic field assisted electrocatalytic oxygen evolution reaction of nickel-based materials

Use of magnetic fields in electrochemistry: A selected review

Recent Advances in Non-Precious Transition Metal/Nitrogen-doped Carbon for Oxygen Reduction Electrocatalysts in PEMFCs

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