Sustainable Carbon‐Based Catalyst Materials Derived From Lignocellulosic Biomass for Energy Storage and Conversion: Atomic Modulation and Properties Improvement

Carbon Energy, Год журнала: 2025, Номер unknown

Опубликована: Март 20, 2025

ABSTRACT Carbon electrocatalyst materials based on lignocellulosic biomass with multi‐components, various dimensions, high carbon content, and hierarchical morphology structures have gained great popularity in electrocatalytic applications recently. Due to the catalytic deficiency of neutral atoms, usage single lignocellulosic‐based electrocatalysis involving energy storage conversion presents unsatisfactory applicability. However, atomic‐level modulation lignocellulose‐based can optimize electronic structures, charge separation, transfer processes, so forth, which results substantially enhanced performance carbon‐based catalysts. This paper reviews recent advances rational design as electrocatalysts from an perspective, such self/external heteroatom doping metal modification. Then, through systematic discussion principles reaction mechanisms catalysts, prepared catalysts rechargeable batteries are reviewed. Finally, challenges improving prospects diverse review contributes synthesis strategy via modulation, turn promotes lignocellulose valorization for conversion.

Язык: Английский

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Porous graphitized carbon-supported Pt for catalytic oxidation of carbon monoxide and formaldehyde under ambient conditions

Separation and Purification Technology, Год журнала: 2025, Номер unknown, С. 131512 - 131512

Опубликована: Янв. 1, 2025

Язык: Английский

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Low‐Temperature Pyrolysis: A Universal Route to High‐Loading Single‐Atom Catalysts for Fuel Cells

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 3, 2025

Abstract High‐temperature pyrolysis (HTP, ≥900 °C) is a widely used method for synthesizing single‐atom catalysts (SACs). However, the high operational temperatures required HTP pose significant challenges in achieving loading, primarily due to Ostwald ripening effect. In this work, low‐temperature trans‐metalation synthesis approach developed which involves exchange of cation between transition metal ions (M = Fe, Co, Cu, Ni, Mn, etc) and Zn 2+ on nitrogen‐doped carbon (NC) matrix within molten salt medium. This strategy effectively avoids phase transformations enables direct formation mass loading (3.7–4.7 wt.%) atomically dispersed M‐N 4 sites. Both experimental theoretical analyses confirm that cation‐exchange occurs at lower temperature threshold 450 °C, significantly reducing energy barriers SACs synthesis. Furthermore, synthesized catalyst with Fe sites demonstrate excellent performance toward oxygen reduction reaction fuel cell peak power density 1.12 W cm −2 an H 2 ─O 1.0 bar 80 °C.

Язык: Английский

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Electronic Structure Modulation Induced by the Synergy of Cobalt Low-Nuclearity Clusters and Mononuclear Sites for Efficient Oxygen Electrocatalysis

ACS Nano, Год журнала: 2024, Номер 19(1), С. 1600 - 1610

Опубликована: Дек. 27, 2024

The development of high-performance bifunctional single-atom catalysts for use in applications, such as zinc–air batteries, is greatly impeded by mild oxygen reduction and evolution reactions (ORR OER). Herein, we report a electrocatalyst designed to overcome these limitations. catalyst consists well-dispersed low-nuclearity Co clusters adjacent single atoms over nitrogen-doped carbon matrix (CoSA+C/NC). precisely tailored asymmetric electronic structures are achieved with strong interactions between species. optimize the adsorption/desorption strength oxygenated intermediates on single-atomic sites endow exceptional activity under alkaline conditions half-wave potential (E1/2) 0.91 V an overpotential (η) 340 mV at 10 mA cm–2. In addition, battery assembled CoSA+C/NC achieves high power density 284.1 mW cm–2 long operational lifespan 400 h, superior those benchmark Pt/C + RuO2. Experimental findings theoretical analysis reveal that enhanced stems from synergistic sites. Consequently, overbinding *OH suppressed accelerated removal. This work establishes design principle advanced electrocatalysts multiphase metal species bearing interactions.

Язык: Английский

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Hybrid Nanoalloy‐Cluster‐Single Atom Sites Based Aerophilic Carbon Fiber Membranes as Binder‐Free Cathodes for Ultra‐Long‐Life Zn‐air Batteries

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 18, 2024

Abstract High‐efficient and durable electrocatalysts for oxygen reduction evolution reaction (ORR/OER) are desirable to Zn‐air batteries (ZABs). However, most of catalysts in powder form with sole active sites remain challenging achieving the satisfactory bifunctional catalysis suffer from peeling off during long‐term operation. Herein, hybrid CoFe constructed containing nanoalloys (≈10 nm), clusters (< 2 single atoms on aerophilic carbon fiber membranes as binder‐free air cathodes ultra‐long‐life ZABs. In particular, high air‐permeability (0.2 s) can prevent blocking by O bubbles promote mass transfer. The theoretical experimental results confirm that hydrophilic 4 /CoFeOOH reconstructed surface mainly responsible OER. While nitrogen (N)‐doped matrix, they play a synergetic role optimizing adsorption energy enhance ORR activity. Thus, as‐prepared exhibit an ultra‐low ORR/OER potential gap (0.64 V). When further assembled freestanding air‐electrodes, it exhibits outstanding cycling lifespan 1200 155 h liquid‐ quasi‐solid‐state ZABs respectively, which fivefold twofold higher than those powder‐based (240/67 h).

Язык: Английский

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Key strategies and challenging perspectives of carbon-based electrocatalysts for sustainable H2O2 production

Journal of Energy Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Фев. 1, 2025

Язык: Английский

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Nitrogen-doped porous carbon supported cobalt sulfide nanocomposites with high catalytic activity for peroxymonosulfate activation in dye degradation

Inorganic Chemistry Communications, Год журнала: 2025, Номер unknown, С. 114489 - 114489

Опубликована: Апрель 1, 2025

Язык: Английский

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Nanosecond Laser‐Induced Conversion of Leaf‐Like Co‐MOF to Nanoscale Co@N‐gCarbon for Enhanced Multifunctional Electrocatalytic Performance

ChemSusChem, Год журнала: 2025, Номер unknown

Опубликована: Май 7, 2025

Conversion of metal-organic frameworks (MOFs) into metal-nitrogen-doped carbon (M-N-C) catalysts requires a high-temperature process and longer processing time under protective atmosphere. This study utilizes low-energy nanosecond laser (LP) technique to convert aqueous synthesized 2D leaf-like Co-MOF (L-Co-MOF) nanoscale cobalt metal encapsulated within nitrogen-doped graphitic matrix (Co@N-gC, Co-LP) in shorter period air The laser-induced results the formation Co@N-gC with smaller Co particle size, uniform distribution, better interaction support compared conventional pyrolysis (CP). LP result enhanced multifunctional electrocatalytic activity over CP (Co-CP) owing tunable metal-support interaction, higher charge transfer, presence multiactive sites. Under optimized conditions (laser fluence: 5.76 mJ cm-2 scan speed: 10 mm s-1), Co-LP-5 catalyst exhibits ORR performance, onset half-wave potentials 0.92 0.76 V, respectively. Additionally, delivers excellent water-splitting OER HER overpotentials 380 280 mV, respectively, achieving an overall energy efficiency 77.85%. Furthermore, demonstrates exceptional durability 48 h real-time testing, outperforming Co-CP, proposed is viable for fabricating catalysts.

Язык: Английский

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Unlocking ultrawide potential windows through S-engineering of M-N-C (M=Cu, Ni, Fe, Co) catalysts at industrial current densities in electrochemical CO2 reduction

Applied Surface Science, Год журнала: 2025, Номер unknown, С. 163740 - 163740

Опубликована: Июнь 1, 2025

Язык: Английский

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ON‐OFF switching of Photocatalytic Hydrogen Evolution by Built‐in Pt‐Nitrogen‐Carbon Reticular Heterojunctions

ChemSusChem, Год журнала: 2024, Номер unknown

Опубликована: Окт. 18, 2024

COF engineering with a built-in, high concentration of defined N-doped sites overcomes the "black-box" drawback conventional trial-and-error N-doping methods (used in polymeric carbon nitride and graphene), that hamper directed evolution functional interfaces based on structure-reactivity guidelines. The cutting-edge challenge is to dissect many complex interdependent functions originate from reticular N-doping, including modification material optoelectronics, band alignments, interfacial contacts co-localization active-sites, producing multiple-set effectors can all play role regulate photocatalysis. Herein, an ON-OFF gated photocatalytic H

Язык: Английский

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