The Effect of an External Magnetic Field on the Electrocatalytic Activity of Heat-Treated Cyanometallate Complexes towards the Oxygen Reduction Reaction in an Alkaline Medium

Zakrzewska, Barbara; Adamczyk, L.; Marcinek, Marek; Miecznikowski, Krzysztof

doi:10.3390/ma15041418

Cited by 5 publications

(2 citation statements)

References 61 publications

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“…Several other examples regarding the effects of magnetic fields in ORR when catalysts are different from Pt and/or its alloys also available in the literature [ 363 , 365 , 366 , 380 , 381 , 382 , 383 , 384 ].…”

Section: Catalysis and Magnetismmentioning

confidence: 99%

Review on Magnetism in Catalysis: From Theory to PEMFC Applications of 3d Metal Pt-Based Alloys

Biz

Gracia²,

Fianchini³

2022

IJMS

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The relationship between magnetism and catalysis has been an important topic since the mid-20th century. At present time, the scientific community is well aware that a full comprehension of this relationship is required to face modern challenges, such as the need for clean energy technology. The successful use of (para-)magnetic materials has already been corroborated in catalytic processes, such as hydrogenation, Fenton reaction and ammonia synthesis. These catalysts typically contain transition metals from the first to the third row and are affected by the presence of an external magnetic field. Nowadays, it appears that the most promising approach to reach the goal of a more sustainable future is via ferromagnetic conducting catalysts containing open-shell metals (i.e., Fe, Co and Ni) with extra stabilization coming from the presence of an external magnetic field. However, understanding how intrinsic and extrinsic magnetic features are related to catalysis is still a complex task, especially when catalytic performances are improved by these magnetic phenomena. In the present review, we introduce the relationship between magnetism and catalysis and outline its importance in the production of clean energy, by describing the representative case of 3d metal Pt-based alloys, which are extensively investigated and exploited in PEM fuel cells.

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Section: Catalysis and Magnetismmentioning

confidence: 99%

Review on Magnetism in Catalysis: From Theory to PEMFC Applications of 3d Metal Pt-Based Alloys

Biz

Gracia²,

Fianchini³

2022

IJMS

View full text Add to dashboard Cite

show abstract

“…The ferromagnetic nature of the film with the spin selectivity effect has been identified as the reason behind this performance improvement . Simultaneously, several other works have been reported where the magnetic field-induced electrocatalytic performance enhancement of various materials (ranging from magnetic element-based metal oxide, alloy compound to carbon) was discussed. – More than 50% reduction in the overpotential value was reported in the presence of an external magnetic field as high as 500 mT. All these reports invariably demonstrate a sharp diode-like ON–OFF behavior of the enhancements corresponding to the presence and absence of H ext , respectively.…”

Section: Introductionmentioning

confidence: 89%

Exploiting the Synergism of a Carbon–Catalyst Interface to Achieve Magneto-Electrocatalytic Overall Water Splitting at 2.197 V

Chowdhury,

Thacharakkal,

Borah

et al. 2023

ACS Appl. Mater. Interfaces

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The desire to electrolyze water at low energy and high kinetics for achieving rapid H2 production forms the holy grail for the paradigm shift to a sustainable H2-driven economy. While alkaline electrolysis is preferred due to the use of earth-abundant catalysts, its sluggish kinetics and high overpotential are the persistent challenges. Addressing this, we demonstrate the coupling of an externally applied magnetic field (H ext) to a synergistically designed interface of nanostructured carbon floret with antiferromagnetic NiO nanoflakes that act in unison to achieve rapid hydrogen generation (6.3 N m3 h–1 W–1) that is comparable with existing technologies. Specifically, the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) overpotentials are simultaneously reduced by 10 and 7%, respectively, under the influence of a weak fridge magnet (H ext = 200 mT). Consequently, ∼11% improvement in the energy efficiency is observed with a 21% reduced cell voltage for overall water splitting. The stability of the system is demonstrated over a prolonged lifetime of ∼95 h. This performance enhancement with H ext for both HER and OER is explained in terms of improved kinetic facility for the reaction and lower resistance of charge transfer pathway. Moreover, the electrocatalyst is seen to retain the improved performance for prolonged usage (∼3 h) even after the removal of the H ext, and hence, it provides an energy-efficient hydrogen and oxygen generation pathway.

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Synthesis and application of graphene-based nanomaterials for microbial fuel cells

Benito-Santiago¹,

Gnanaseelan²,

Guerrero-Contreras³

et al. 2023

Advanced Nanomaterials and Nanocomposites for Bioelectrochemical Systems

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The Effect of an External Magnetic Field on the Electrocatalytic Activity of Heat-Treated Cyanometallate Complexes towards the Oxygen Reduction Reaction in an Alkaline Medium

Cited by 5 publications

References 61 publications

Review on Magnetism in Catalysis: From Theory to PEMFC Applications of 3d Metal Pt-Based Alloys

Review on Magnetism in Catalysis: From Theory to PEMFC Applications of 3d Metal Pt-Based Alloys

Exploiting the Synergism of a Carbon–Catalyst Interface to Achieve Magneto-Electrocatalytic Overall Water Splitting at 2.197 V

Synthesis and application of graphene-based nanomaterials for microbial fuel cells

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