Ferroelectric electrocatalysts: a new class of materials for oxygen evolution reaction with synergistic effect of ferroelectric polarization

Kushwaha, H.S.; Halder, Aditi; Vaish, Rahul

doi:10.1007/s10853-017-1611-7

Cited by 16 publications

(9 citation statements)

References 49 publications

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“…In electrocatalysis, the implementation of ferroelectrics have been mainly limited to nanoparticles (e.g., Bi 0.5 Na 0.5 TiO 3 38 and Bi 4 Ti 3 O 12 −BiCoO 3 mixtures 35 ) for water splitting and the oxygen evolution reaction (OER). 39 We note that the major challenge for using nanoparticle ferroelectrics for electrocatalysis is the inherent challenge in switching the polarization, due to the need for large coercive fields and also to the less well-defined catalytic interface.…”

Section: ■ Introductionmentioning

confidence: 99%

Ferroelectric Modulation of Surface Electronic States in BaTiO₃ for Enhanced Hydrogen Evolution Activity

et al. 2022

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Ferroelectric nanomaterials offer the promise of switchable electronic properties at the surface, with implications for photo- and electrocatalysis. Studies to date on the effect of ferroelectric surfaces in electrocatalysis have been primarily limited to nanoparticle systems where complex interfaces arise. Here, we use MBE-grown epitaxial BaTiO3 thin films with atomically sharp interfaces as model surfaces to demonstrate the effect of ferroelectric polarization on the electronic structure, intermediate binding energy, and electrochemical activity toward the hydrogen evolution reaction (HER). Surface spectroscopy and ab initio DFT+U calculations of the well-defined (001) surfaces indicate that an upward polarized surface reduces the work function relative to downward polarization and leads to a smaller HER barrier, in agreement with the higher activity observed experimentally. Employing ferroelectric polarization to create multiple adsorbate interactions over a single electrocatalytic surface, as demonstrated in this work, may offer new opportunities for nanoscale catalysis design beyond traditional descriptors.

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Section: ■ Introductionmentioning

confidence: 99%

Ferroelectric Modulation of Surface Electronic States in BaTiO₃ for Enhanced Hydrogen Evolution Activity

et al. 2022

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“…In electrocatalysis, the interactions between the reactant and the catalyst could be also affected by the polarization. 98 In 2018, Kushwaha et al 99 investigated the effect of ferroelectric Bi 0.5 Na 0.5 TiO 3 (BNT) with different polarization values on the electrocatalytic oxygen evolution reaction (OER) ( Figure 10 ). They found that iron polarization can be used to adjust the OER activity of BNT, which has a certain relationship with the built-in electric field generated by the polarization in BNT.…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Ferroelectric Materials and Their Applications in Activation of Small Molecules

et al. 2023

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The demand for renewable and environmentally friendly energy sources has attracted extensive research on high-performance catalysts. Ferroelectrics, a class of materials with switchable polarization, are unique and promising catalyst candidates due to the significant effects of polarization on surface chemistry and physics. The band bending at the ferroelectric/semiconductor interface induced by the polarization flip promotes charge separation and transfer, thereby enhancing the photocatalytic performance. More importantly, the reactants can be selectively adsorbed on the surface of ferroelectric materials depending on the polarization direction, which can effectively lift the basic limitations as imposed by Sabatier’s principle on catalytic activity. This Review summarizes the latest developments of ferroelectric materials and introduces ferroelectric-related catalytic applications. The possible research directions of 2D ferroelectric materials in chemical catalysis are discussed at the end. The Review is expected to inspire extensive research interests from physical, chemical, and materials science communities.

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“…Recently, it was exhibited that the noncentrosymmetric polar (ferroelectric) materials are likely to become a type of new-generation electrocatalyst. The repeating layers of [Bi 2 O 2 ] 2+ in BiOCl, along the c-direction, show an anisotropy with spontaneous polarization, which underlies the ferroelectricity in the BiOCl lattice and makes it a more effective electrocatalyst for the adsorption of polar species on their surface. , Prior research has shown that incorporating iron (Fe) can enhance surface roughness, reveal active sites, and boost ferroelectric polarization. − Theoretical calculations suggest that Fe doping can alter the electrical properties of materials . As a result, it is anticipated that Fe-substituted BiOCl will demonstrate impressive OER activity.…”

Section: Introductionmentioning

confidence: 99%

Ferroelectric Polarization and Iron Substitution Synergistically Boost Electrocatalytic Oxygen Evolution Reaction in Bismuth Oxychloride Nanosheets

Singh,

Joshi,

Poddar

2023

Langmuir

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Ferroelectric materials have gained significant interest in various kinds of water splitting, but the study of ferroelectric materials for electrocatalytic water splitting is in its infancy. Ferroelectric materials have spontaneous polarization below their Curie temperature due to dipolar alignment, which results in surface charges. In 2D ferroelectric materials, spontaneous polarization depends on thickness. Herein, we report that thickness-dependent ferroelectric polarization in 2D nanosheets can also accelerate the oxygen evolution reaction (OER) along with the tailored active surface area of exposed crystalline facets, which improves the electrocatalytic activity relatively. Iron-substituted BiOCl nanosheets of varying thickness are fabricated by varying the pH using a facile coprecipitation method. The substituted iron enhances polarization and electrochemical active sites on the surface. The findings in this study show that the exposed (001) facet and higher thickness of the nanosheets have high ferroelectric polarization and, in turn, superior electrocatalytic activity and remarkable stability, requiring low overpotentials (348 mV and 270 mV at 100 mA/cm 2 and 10 mA/cm 2 ) in alkaline (1.0 M KOH) electrolyte. As the thickness of the nanosheets is decreased from 140 to 34 nm, the electrocatalytic performance of iron-substituted BiOCl nanosheets starts to reduce due to the lower Coulomb−Coulomb interaction and the increasing depolarization.

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Ferroelectric electrocatalysts: a new class of materials for oxygen evolution reaction with synergistic effect of ferroelectric polarization

Cited by 16 publications

References 49 publications

Ferroelectric Modulation of Surface Electronic States in BaTiO₃ for Enhanced Hydrogen Evolution Activity

Ferroelectric Modulation of Surface Electronic States in BaTiO₃ for Enhanced Hydrogen Evolution Activity

Ferroelectric Materials and Their Applications in Activation of Small Molecules

Ferroelectric Polarization and Iron Substitution Synergistically Boost Electrocatalytic Oxygen Evolution Reaction in Bismuth Oxychloride Nanosheets

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Ferroelectric electrocatalysts: a new class of materials for oxygen evolution reaction with synergistic effect of ferroelectric polarization

Cited by 16 publications

References 49 publications

Ferroelectric Modulation of Surface Electronic States in BaTiO3 for Enhanced Hydrogen Evolution Activity

Ferroelectric Modulation of Surface Electronic States in BaTiO3 for Enhanced Hydrogen Evolution Activity

Ferroelectric Materials and Their Applications in Activation of Small Molecules

Ferroelectric Polarization and Iron Substitution Synergistically Boost Electrocatalytic Oxygen Evolution Reaction in Bismuth Oxychloride Nanosheets

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Ferroelectric Modulation of Surface Electronic States in BaTiO₃ for Enhanced Hydrogen Evolution Activity

Ferroelectric Modulation of Surface Electronic States in BaTiO₃ for Enhanced Hydrogen Evolution Activity