Advances in dual-site mechanisms for designing high-performance oxygen evolution electrocatalysts

eScience, Journal Year: 2025, Volume and Issue: unknown, P. 100403 - 100403

Published: March 1, 2025

Language: Английский

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Efficient and rapid preparation of high-performance porous reduced graphene films as HER/OER bifunctional electrocatalysts for overall water splitting

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 120, P. 412 - 421

Published: March 28, 2025

Language: Английский

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Surface engineering strategy to synthesize bicomponent carbons for rechargeable zinc-air batteries

Energy storage materials, Journal Year: 2024, Volume and Issue: 70, P. 103520 - 103520

Published: June 1, 2024

Language: Английский

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Hyperspectral and Weather Resistant Biomimetic Leaf Enabled by Interlayer Confinement

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(45)

Published: July 6, 2024

Abstract Mimicking the characteristics and achieving specific functions of biological systems is stirring but challenging. Generally, pigments in commercial coating can only achieve a similarity chromaticity, while cannot obtain solar reflective spectrum whose difficulty resides simulating spectral simultaneously. Unfortunately, traditional organic show poor weather heat resistance. Herein, with little difference color (Δ E ab * ), high similarity, as well adjustable green peak similar red edge slope compared common plants (pagoda tree leaf, etc.) 400–2500 nm, also attained. It achieved by interlayer confined pigment Mg/Al‐layered double hydroxide (Mg/Al‐LDH) layers. The corresponding biomimetic leaf displays hyperspectral performance angle cosine 0.9922 resistance at 120 °C. longer than that mechanical mixing demonstrated. intercalated chromophores sodium copper chlorophyllin Mg/Al‐LDH confinement contribute to excellent performance. This work provides requiring same chromaticity plants, filling long‐term use demand gap for weather‐resistant vegetation.

Language: Английский

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Atomically dispersed Fe/Co–N–C and their composites for proton exchange membrane fuel cells

Materials Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 8(8), P. 1927 - 1949

Published: Jan. 1, 2024

Atomically dispersed Fe/Co–N–C and their composites for fuel cells.

Language: Английский

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Three‐dimensional interconnected graphene network‐based high‐performance air electrode for rechargeable zinc‒air batteries

SusMat, Journal Year: 2024, Volume and Issue: 4(3)

Published: May 8, 2024

Abstract Although zinc‒air batteries (ZABs) are regarded as one of the most prospective energy storage devices, their practical application has been restricted by poor air electrode performance. Herein, we developed a free‐standing that is fabricated on basis multifunctional three‐dimensional interconnected graphene network. Specifically, network with fast mass and electron transport ability, prepared catalyzing growth foam nickel then filling reduced oxide into pores foam, used to anchor iron phthalocyanine molecules atomic Fe‒N 4 sites for boosting oxygen reduction during discharging nanosized FeNi hydroxides accelerating evolution charging. As result, obtained exhibited an ultra‐small electrocatalytic overpotential 0.603 V reactions, high peak power density 220.2 mW cm ‒2 , small stable charge‒discharge voltage gap 0.70 at 10 mA after 1136 cycles. Furthermore, in situ Raman spectroscopy together theoretical calculations confirmed phase transformation takes place from α‐Ni(OH) x β‐Ni(OH) γ‐Ni (3+δ)+ OOH reaction Ni active center while Fe enhances activity sites.

Language: Английский

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Multi-interface engineering of nickel-based electrocatalysts for alkaline hydrogen evolution reaction

Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

High gravimetric energy density and zero carbon emission of hydrogen have motivated to be an attractive alternative fossil fuels. Electrochemical water splitting in alkaline medium, driven by green electricity from renewable sources, has been mentioned as a potential solution for sustainable production. Hydrogen evolution reaction (HER), cathodic half-reaction splitting, requires additional overpotential obtain protons via adsorption/dissociation, suffering slow kinetics solution. Robust active nickel (Ni)-based electrocatalyst is promising candidate achieving precious-metal comparable performance owing its platinum-like electronic structures with more efficient electrical power consumption. Various modification strategies explored on Ni-based catalysts, among which multi-interface engineering one the most effective routines optimize both intrinsic activity electrocatalysts extrinsic stacked component limitations. Herein, we systematically summarize recent progress improve their HER catalytic activity. The origin sluggish first discussed. Subsequently, three kinds interfaces, geometrically reactively, conductive substrate/electrocatalyst interface, internal heterointerface, electrocatalyst/electrolyte were cataloged discussed contribution mechanisms toward HER. Particular focuses lie microstructural modulation key intermediates energetically favorable adsorption/desorption behaviors rationally designed interfaces. Finally, challenges perspectives are We hope that this review will inspiring beneficial exploration electrolysis.

Language: Английский

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Hydrogen Spillover Effect in Electrocatalysis: Delving into the Mysteries of the Atomic Migration

Energy & environment materials, Journal Year: 2024, Volume and Issue: 7(5)

Published: May 15, 2024

Hydrogen spillover effect has recently garnered a lot of attention in the field electrocatalytic hydrogen evolution reactions. A new avenue for understanding dynamic behavior atomic migration which atoms moving on catalyst surface was opened up by setup word “hydrogen spillover.” However, there is currently dearth thorough knowledge regarding effect. Currently, advancement sophisticated characterization procedures offers progressively useful information to enhance our grasp The material fabrication erupted. Considering these factors, we made an effort review most articles published and carefully analyzed aspect fabrication. All been directed toward molecular pathway that leads improve reactions performance. In addition, have attempted elucidate paths through utilization DFT calculations. Furthermore, provide some preliminary research suggestions highlight opportunities obstacles are still be confronted this study area.

Language: Английский

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Crystal phase engineering of CoBOx/NiCoP heterostructures as trifunctional electrocatalysts for overall water splitting and urea electrolysis

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 494, P. 152973 - 152973

Published: June 15, 2024

Language: Английский

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Thermal Evaporating-Trapping Strategy to Synthesize Flexible and Robust Oxygen Electrocatalysts for Rechargeable Zinc-Air Batteries

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(23), P. 9375 - 9382

Published: Jan. 1, 2024

A thermal evaporation–trapping strategy is developed to fabricate a flexible N-doped carbon fiber cloth loaded with both CoFe-oxide nanoparticles and atomic Co/Fe–N x sites, showing outstanding oxygen electrocatalytic performance.

Language: Английский

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