Electronic and Structural Disorder of the Epitaxial La0.67Sr0.33MnO3 Surface DOI Creative Commons
Michael Verhage, Emma van der Minne, Ellen M. Kiens

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: unknown

Published: April 15, 2024

Understanding and tuning epitaxial complex oxide films are crucial in controlling the behavior of devices catalytic processes. Substrate-induced strain, doping, layer growth known to influence electronic magnetic properties bulk film. In this study, we demonstrate a clear distinction between surface thin La0.67Sr0.33MnO3 terms chemical composition, disorder, morphology. We use combined experimental approach X-ray-based characterization methods scanning probe microscopy. Using X-ray diffraction resonant reflectivity, uncover nonstoichiometry strontium lanthanum alongside an accumulation oxygen vacancies. With tunneling microscopy, observed phase separation (EPS) on related nonstoichiometry. The EPS is likely driving temperature-dependent resistivity transition cause proposed mixed-phase ferromagnetic paramagnetic states near room temperature these films.

Language: Английский

Layered double hydroxide for photocatalytic application toward CO2 reduction and water splitting: Recent advances, synthesis, heterojunction formation, challenges, and future directions DOI
Azmat Ali Khan, Muhammad Tahir,

Nazish Khan

et al.

Applied Physics Reviews, Journal Year: 2025, Volume and Issue: 12(1)

Published: Feb. 3, 2025

Solar fuel production through water splitting and CO2 reduction by employing photocatalytic materials is a paradigm track to present renewable energy sources lessen global warming. Among these materials, layered double hydroxides (LDHs) have been widely investigated in produce chemical fuels. However, pure LDHs suffer from sluggish charge-carrier transport, great electron–hole recombination rate as well tend cause agglomeration. Due the aforementioned bottlenecks, numerous modification techniques considerably explored enhance potential of toward photoreduction. Therefore, this article presents thorough review developments made for construction LDH photocatalyst properties aiming reduction. The starts with adopted synthesize LDH-based structures enhanced structure morphology. key semiconducting, optical, electronic are studied understand conduct excellent material. study then deliberates such morphological engineering, hybridization conducting semiconducting vacancy creation defect components tuning, photothermal catalysis, heterojunction, heterostructural engineering employed enrichment properties. also discusses steps taken adsorption coupling computational operando structural, optical investigate best-performing photocatalysts. reviews recent advancements applications conversion.

Language: Английский

Citations

1
Utilizing the magnetic properties of electrodes and magnetic fields in electrocatalysis DOI
Nawaraj Karki,

Fredrick Lisili Mufoyongo,

Andrew J. Wilson

et al.

Inorganic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(17), P. 5414 - 5434

Published: Jan. 1, 2024

In this review, we describe how external magnetic fields and the intrinsic magnetism of catalysts can affect electrocatalytic reactions using select literature reports.

Language: Английский

Citations

5
Quantum fundaments of catalysis: true electronic potential energy DOI
José Gracia, Chiara Biz, Mauro Fianchini

et al.

Physical Chemistry Chemical Physics, Journal Year: 2024, Volume and Issue: 26(34), P. 22620 - 22639

Published: Jan. 1, 2024

Catalysis is a quantum phenomenon enthalpically driven by electronic correlations with many-particle effects in all of its branches, including electro-photo-catalysis and electron transfer. This means that only probability amplitudes provide complete relationship between the state catalysis observations. Thus, any atomic system material), competing space-time interactions coexist to define (related) properties such as stability, (super)conductivity, magnetism (spin-orbital ordering), chemisorption catalysis. Catalysts, reactants, chemisorbed transition states have possibility optimizing improve reaction kinetics. Active sites closed-shell orbital configurations share maximum number spin-paired electrons, mainly coulombic attractions covalency defining weakly correlated (WCCS) structures. However, compositions open-shell configurations, at least, spin exchange (QSEIopenshells) arise, stabilising unpaired electrons less covalent bonds differentiating non-weakly (or strongly) (NWCOS) systems. In NWCOS catalysts, ground can diverse rival spin-orbital orderings well ferro-, ferri- multiple antiferro-magnetic textures, which deeply their activities. Particularly inter-atomic ferromagnetic (FM) bonds, increase relevance non-classical potentials significantly optimize energies, (TSs), activation energies (overpotential) spin-dependent transfer (conductivity), overall implying need for explaining thermodynamic kinetic origin from true energy. To do so, we use connection Born-Oppenheimer approximation Virial theorem treatment potential energies. exact fundamental decompose TSs appear. The increasing stabilization TSs, due on NWCO opens simultaneously reducing enthalpies barriers mechanisms, implies anticipation explanation positive deviations Brønsted-Evans-Polanyi principle.

Language: Английский

Citations

4
Advances in hybrid strategies for enhanced photocatalytic water splitting: Bridging conventional and emerging methods DOI
Sandeep Kumar Lakhera,

K. Priyanga Kangeyan,

Crescentia Yazhini S

et al.

Applied Physics Reviews, Journal Year: 2024, Volume and Issue: 11(4)

Published: Oct. 8, 2024

Significant efforts have been dedicated to hydrogen production through photocatalytic water splitting (PWS) over the past five decades. However, achieving commercially viable solar-to-hydrogen conversion efficiency in PWS systems remains elusive. These face intrinsic and extrinsic challenges, such as inadequate light absorption, insufficient charge separation, limited redox active sites, low surface area, scalability issues practical designs. To address these issues, conventional strategies including heterojunction engineering, plasmonics, hybridization, lattice defects, sensitization, upconversion processes extensively employed. More recently, innovative hybrid like photonic crystal-assisted polarization field-assisted emerged, which improve absorption separation by harnessing slow photon effect, multiple scattering, piezoelectric, pyroelectric, ferroelectric properties of materials. This review article aims provide a comprehensive examination summary new synergistic approaches, integrating plasmonic effects, processes, crystal photocatalysis. It also explores role temperature suppressing exciton recombination during photothermic highlights emerging effects magnetic fields, periodic illumination, many-body large-hole polaron, anapole excitations, hold significant potential advance technology facilitate renewable generation.

Language: Английский

Citations

4
In Situ Manipulation of Surface Spin Configurations for Enhanced Performance in Oxygen Evolution Reactions DOI
Chao Zhong, Wenda Zhou, Xingfang Luo

et al.

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 13, 2025

In situ studies of the relationship between surface spin configurations and spin-related electrocatalytic reactions are crucial for understanding how magnetic catalysts enhance oxygen evolution reaction (OER) performance under fields. this work, 2D Fe7Se8 nanosheets with rich synthesized via chemical vapor deposition. force microscopy Raman spectroscopy reveal that a 200 mT field eliminates spin-disordered domain walls, forming spin-ordered single-domain structure, which lowers OER energy barrier, as confirmed by theoretical calculations. Electrochemical tests show field, overpotential multidomain at 10 mA cm–2 decreases from 346 mV to 259 mV, while has minimal effect on nanosheets. These findings highlight critical role in enhancing performance, offering new insights into design industrial applications.

Language: Английский

Citations

0
GO-RXR: Global Optimization of Resonant X-ray Reflectometry DOI Creative Commons
Lucas Korol, Robert J. Green, Jesús P. Curbelo

et al.

The Journal of Open Source Software, Journal Year: 2025, Volume and Issue: 10(107), P. 7165 - 7165

Published: March 13, 2025

Language: Английский

Citations

0
The Design of Spin Catalysts: Breakthroughs toward Efficient Energy Conversion DOI Creative Commons
Yantao Yang, Yufeng Li, Baipeng Yin

et al.

ChemElectroChem, Journal Year: 2025, Volume and Issue: unknown

Published: March 30, 2025

In energy conversion technologies, the electron spin effect in catalysts plays a crucial role overcoming spin‐forbidden reactions, offering novel approach to overcome performance bottlenecks of catalysts. Recently, with breakthroughs magnetic field–enhanced catalysis and theoretical predictions, significant progress has been made design development this concept, several attractive inspiring catalyst strategies reported recently, particularly precise modulation states/spin interactions at catalytic sites through coordination modulation, spin‐pinning effect, chirality induction, radical adsorption, are outlined. The concept then explores advantages these enhancing activity/selectivity, investigating selectivity reaction pathways, expanding systems. Finally, proposes future directions for technologies.

Language: Английский

Citations

0
In Situ Identification of Spin Magnetic Effect on Oxygen Evolution Reaction Unveiled by X-ray Emission Spectroscopy DOI Creative Commons

C. J. Huang,

Hsin‐An Chen,

Wei-Xuan Lin

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: April 12, 2025

Manipulating the spin ordering of oxygen evolution reaction (OER) catalysts through magnetization has recently emerged as a promising strategy to enhance performance. Despite numerous experiments elaborating on magnetic effect for improved OER, origin this phenomenon remains largely unexplored, primarily due difficulty in directly distinguishing states electrocatalysts during chemical reactions at atomic level. X-ray emission spectroscopy (XES), which provides information sensitive specific elements complex, may serve technique differentiate onset OER catalytic activities from influence states. In work, we employ situ XES technique, along with absorption (XAS), investigate interplay between atomic/electronic structures, states, and CoFe2O4 (CFO) catalyst under an external field. This enhancement is that facilitates spin-selective electron transfer adsorbed OH- reactants, strongly depends configurations tetrahedral-(Td) octahedral-(Oh) sites both Fe Co ions. Our result contributes comprehensive understanding field-assisted electrocatalysis level paves way designing highly efficient catalysts.

Language: Английский

Citations

0
Magnetic Stimuli-Guided Multiple Charge Transfer Pathways for Boosted Overall Water Splitting DOI
Moumita Chandra, Peeyush Pandey,

Alpana Sahu

et al.

ACS Applied Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 15, 2025

Language: Английский

Citations

0
Spin-related and non-spin-related effects of magnetic fields on water oxidation DOI

Anke Yu,

Yuwei Zhang, Siyuan Zhu

et al.

Nature Energy, Journal Year: 2025, Volume and Issue: 10(4), P. 435 - 447

Published: April 24, 2025

Language: Английский

Citations

0