Deep Electronic State Regulation through Unidirectional Cascade Electron Transfer Induced by Dual Junction Boosting Electrocatalysis Performance

Advanced Science, Journal Year: 2023, Volume and Issue: 10(31)

Published: Sept. 15, 2023

Unidirectional cascade electron transfer induced by multi-junctions is essential for deep electronic state regulation of the catalytic active sites, while this advanced concept has rarely been investigated in field electrocatalysis. In present work, a dual junction heterostructure (FePc/L-R/CN) designed anchoring iron phthalocyanine (FePc)/MXene (L-Ti3 C2 -R, R═OH or F) heterojunction on g-C3 N4 nanosheet substrates The unidirectional (g-C3 → L-Ti3 -R FePc) FePc/L-Ti3 and -R/g-C3 makes Fe center electron-rich therefore facilitates adsorption O2 oxygen reduction reaction (ORR). Moreover, between FePc MXene facilitated axial Fe─O coordination interaction with OH alkalized nanosheets -OH). As result, FePc/L-OH/CN exhibits an impressive ORR activity half-wave potential (E1/2 ) 0.92 V, which superior over catalysts single state-of-the-art Pt/C = 0.85 V). This work provides broad idea multi-step charge can be extended to other proton-coupled processes.

Language: Английский

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Atomically Dispersed Metal‐Nitrogen‐Carbon Electrocatalysts for the Oxygen Reduction Reaction

ChemElectroChem, Journal Year: 2024, Volume and Issue: 11(10)

Published: March 25, 2024

Abstract The quest for alternatives to Pt as an oxygen reduction electrocatalyst, possessing high activity, stability, and abundant reserves, holds great significance H 2 /O fuel cells. Recently, metal‐nitrogen‐carbon (M‐N‐C) electrocatalysts have garnered substantial attention promising substitutes. These not only exhibit well‐defined structures but also offer the flexibility adjust central metal atoms coordination atoms. It is beneficial in elucidating active sites during catalytic process design of highly electrocatalysts. In this review, real site M‐N‐C electrocatalyst‐driven ORR investigated depth by situ characterization techniques such X‐ray absorption spectroscopy, Raman Fourier‐transform infrared spectroscopy. It′s worth noting that activity originates from dynamic evolution electrocatalyst structure. Subsequently, we review various synthetic strategies, including wet chemistry method, spatial confinement, template‐assisted aimed at rational Moreover, recent progresses with varying configurations, encompassing single‐atom, double‐atom are discussed, Finally, summary perspectives on development provided.

Language: Английский

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Medium-entropy alloy MoCoCu-P as an efficient bifunctional catalyst for water splitting

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: 988, P. 174332 - 174332

Published: March 29, 2024

Language: Английский

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Cu and P co-doped nitrogen-doped hierarchical carbon for enhanced oxygen reduction reaction in zinc-air battery

Dalton Transactions, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

High-performance Fe-based nitrogen-doped carbon oxygen reduction catalysts have been widely reported, but the Fenton reaction faced by such has hindered their practical application in fuel cells. The development of inexpensive, effective, and durable non-Fe electrocatalysts is important for advancing cell technology. In this work, we introduced a molecular coordination chemistry method to synthesize Cu- P-co-doped hierarchical (Cu-P-N-C) (ORR) electrocatalyst pyrolyzing mixture phytate melamine. refined Cu-P-N-C material showcased three-dimensional, porous, interconnected nanosheet structure with an ultra-high specific surface area abundance active sites. catalyst displayed half-wave potential (E1/2) 0.86 VRHE, higher than that commercial Pt/C 0.1 M KOH. It was also found maintain impressive long-term stability, retaining 95.4% its initial activity after extensive testing. When integrated into zinc-air batteries (ZABs), observed deliver exceptional performance, achieving high peak power density 164.5 mW cm-2, promising capacity 807 mA h g-1, remarkable stability. These findings underscore as candidate next-generation ORR new energy devices.

Language: Английский

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Synergistic effects in heterogeneous catalysis: Status and perspectives

Materials Today Chemistry, Journal Year: 2025, Volume and Issue: 46, P. 102722 - 102722

Published: April 24, 2025

Language: Английский

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Superhydrophilic Dendritic FeP/Cu₃P Electrocatalyst for Urea Splitting via the Intramolecular Mechanism

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(9), P. 4204 - 4213

Published: Feb. 22, 2024

The electrocatalytic overall urea splitting can achieve the dual goals of treatment and hydrogen energy acquisition. Herein, we exploited principle precipitation dissolution equilibrium to obtain bimetallic phosphide FeP/Cu3P/CF for simultaneous oxidation reduction water comprehensively reveal inherent molecular thermodynamic mechanisms on surface catalysts. excellent electrochemical performance be derived from super affinity synergistic effect. Especially, theoretical calculation unveils that effect between FeP Cu3P lower activation required electrooxidation, thereby promoting splitting. In situ differential mass spectrometry (in DEMS) measurements further demonstrated proceeded according intramolecular mechanism. This work has laid foundation constructing highly efficient superhydrophilic bifunctional electrocatalysts.

Language: Английский

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Constructing CoFe alloy and tailoring d-band center in trimetallic ZIF-derived porous carbon for bifunctional oxygen electrocatalysis

Fuel, Journal Year: 2025, Volume and Issue: 388, P. 134521 - 134521

Published: Jan. 31, 2025

Language: Английский

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Positive shift of the d-Band center in Cu nanoparticles facilitates electrocatalytic hydrogenation of furfural under mild pH conditions

Journal of Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 116003 - 116003

Published: Feb. 1, 2025

Language: Английский

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High-entropy (FeMnMoNi)Se2 nanoflower structure with multi-active sites for urea-assisted hydrogen generation

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162264 - 162264

Published: April 1, 2025

Language: Английский

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Atomic Rare‐Earth Gd‐N‐C Nanosheets with Low f‐d‐p Hybridization Energy for Efficient Oxygen Reduction Reaction

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 7, 2025

Abstract Developing the new member of transition Metal‐nitrogen‐carbon (M‐N‐C) for oxygen reduction reaction (ORR) is critical to address issues in 3d‐orbital metal M‐N‐C as noble metal‐free catalyst achieve affordable fuel cells and metal‐air batteries. Herein, Gd‐N‐C nanosheets are developed by pyrolyzing self‐polymerized compound 2, 6‐diaminopyridine initiated GdCl 3 . The features a unique mixed structure single GdN 5 moieties Gd x N y O z atomic clusters, exhibiting excellent ORR performance with half‐wave potentials 0.89 0.76 V versus RHE 0.1 M KOH 0.5 H 2 SO 4 , respectively, activity confirmed high‐performance Zn‐air battery proton exchange membrane cell maximum power density 191 370 mW cm −2 cathodes, respectively. Moreover, theoretical calculation verifies that moiety specific f‐d hybridization facilitates interaction intermediate OH* produce d‐p hybridization, which can significantly reduce adsorption energy OH*, while existence clusters also enhance effect effectively promote ORR. results confirm active site first time extend library catalysts.

Language: Английский

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