Atomically Dispersed Co–P Moieties via Direct Thermal Exfoliation for Alkaline Hydrogen Electrosynthesis

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

Published: Jan. 25, 2025

The development of highly active and stable cathodes in alkaline solutions is crucial for promoting the commercialization anion exchange membrane (AEM) electrolyzers, yet it remains a significant challenge. Herein, we synthesized atomically dispersed CoP4 moieties (CoP4–SSC) immobilized on ultrathin carbon nanosheets via phosphidation exfoliation strategy at medium temperature. thermodynamic formation process Co–P was elucidated using X-ray absorption spectroscopy (XAS) theoretical calculations. Remarkably, resulting CoP4–SSC electrocatalyst exhibited outstanding activity hydrogen evolution, with low overpotential 52 mV 10 mA cm–2 turnover frequency up to 23.83 s–1. Moreover, AEM electrolyzer fabricated achieved current density 1 A under an applied voltage only 1.94 V, showing negligible degradation after 500 h continuous electrocatalysis. series operando characterizations functional theory calculations revealed that formed nanointerface [P-*H···H2O*-Co], which facilitates water dissociation during Volmer–Heyrovsky pathway.

Language: Английский

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Exploring the properties, types, and performance of atomic site catalysts in electrochemical hydrogen evolution reactions

Chemical Society Reviews, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

This review investigates atomic site catalysts (ASCs) for electrochemical hydrogen evolution reaction (HER), discussing their properties, types, performance, significance, activity, selectivity, stability, challenges, and future research directions.

Language: Английский

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Twin-distortion modulated ultra-low coordination PtRuNi-Ox catalyst for enhanced hydrogen production from chemical wastewater

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Nov. 22, 2024

The development of efficient and robust catalysts for hydrogen evolution reaction is crucial advancing the economy. In this study, we demonstrate that ultra-low coordinated hollow PtRuNi-Ox nanocages exhibit superior catalytic activity stability across varied conditions, notably surpassing commercial Pt/C catalysts. Notably, achieve current densities 10 mA cm−2 at only 19.6 ± 0.1, 20.9 21.0 0.1 mV in alkaline freshwater, chemical wastewater, seawater, respectively, while maintaining satisfied with minimal loss after 40,000 cycles. situ experiments theoretical calculations reveal coordination Pt, Ru, Ni atoms creates numerous dangling bonds, which lower water dissociation barrier optimizing adsorption. This research marks a notable advancement precise engineering atomically dispersed multi-metallic centers energy-related applications. Efficient are key to economy, particularly reaction. Here, authors report offer comparable performance both freshwater wastewater conditions.

Language: Английский

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Breaking symmetry for better catalysis: insights into single-atom catalyst design

Chemical Society Reviews, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

This review examines the strategies of symmetry breaking (charge/coordination/geometric) in single-atom catalysts to regulate active site electronic structures, greatly enhancing catalytic performance.

Language: Английский

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Efficient removal of per- and polyfluoroalkyl substances by a metal-organic framework membrane with high selectivity and stability

Water Research, Journal Year: 2024, Volume and Issue: 265, P. 122276 - 122276

Published: Aug. 15, 2024

Language: Английский

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Alkaline Hydrogen Evolution Reaction Electrocatalysts for Anion Exchange Membrane Water Electrolyzers: Progress and Perspective

JACS Au, Journal Year: 2024, Volume and Issue: 4(12), P. 4639 - 4654

Published: Nov. 21, 2024

For the aim of achieving carbon-free energy scenario, green hydrogen (H

Language: Английский

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Enhanced Transformation Kinetics of Polysulfides Enabled by Synergistic Catalysis of Functional Graphitic Carbon Nitride for High‐Performance Li‐S Batteries

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 29, 2024

Abstract The introduction of an electrocatalyst to accelerate the kinetics lithium polysulfides (LiPSs) reduction/oxidation is beneficial enhance capacity sulfur cathode and inhibit shuttling effect LiPSs. However, current electrocatalysts mainly focus on metal‐based active sites reduce reaction barriers, there remains a great challenge in developing light‐weighted metal‐free catalysts. In this work, 1D graphitic carbon nitride nanorods (g‐C 3 N 4 ‐NRs) with carboxyl (─COOH) acylamide (─CONH 2 ) functional groups are designed as for lithium‐sulfur batteries transport Li + conversion density theory (DFT) calculations prove that existence ─COOH group realizes adsorption LiPSs accelerates , while ─CONH energy barrier S 8 S. addition, situ UV–vis nucleation/dissociation experiments also verify g‐C ‐NRs achieve rapid transformation under synergistic action groups. Consequently, based ‐NRs‐PP separator at specific 700.3 mAh g −1 after 70 cycles 0.2 C, 0 °C. This work provides new strategy breaking through bottleneck catalysts high‐performance batteries.

Language: Английский

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Fe single atoms coupled Fe3C multi-functional catalysts on P, F, N-doped carbon nanotubes for stable Zn-air batteries with ultra-high power densities

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(44), P. 30798 - 30809

Published: Jan. 1, 2024

Fe-single-atom-coupled Fe 3 C multifunctional catalysts on P-, F-, N-doped CNT deliver comparable OER behavior to RuO 2 , better ORR performance than Pt/C, and ZAB Pt/C–RuO due the nanoarchitecture abundant active sites.

Language: Английский

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Phosphorus‐Enhanced Bimetallic Single‐Atom Catalysts for Hydrogen Evolution

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

Published: Oct. 12, 2024

Abstract Single‐atom catalysts (SACs), where individual metal atoms are anchored on support, hold great promise for electrocatalytic hydrogen evolution reactions (HERs). The inherent simplicity of the single‐atom center restricts opportunities further enhancement. Binuclear SACs, incorporating two different sites, can improve HER kinetics. However, underlying mechanisms at binuclear sites complex and not fully understood, hampering design new efficient catalyst structures. Here, a comprehensive investigation is presented into phosphorus‐doped iron cobalt bimetallic SACs supported nitrogen‐doped graphitic carbon (P/FeCo‐NC), focusing potential underpinning their enhanced activity. P/FeCo‐NC exhibits overpotentials 38 95 mV 10 mA cm 2 in 0.5 m H SO 4 1 KOH, respectively, nearing acidic performance commercial Pt/C (33 mV). Theoretical studies reveal that phosphorus bridge significantly alters electronic properties Fe active while adjacent Co modulate environment, optimizing adsorption‐free energy toward more favorable This work highlights structure‐activity relationships opens perspectives future applications.

Language: Английский

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Enhanced activation of peroxymonosulfate by one-step biosynthesis of reduced graphene oxide-supported nano iron sulfide: Effect of physicochemical factors on catalytic activity

Colloids and Surfaces A Physicochemical and Engineering Aspects, Journal Year: 2025, Volume and Issue: unknown, P. 136142 - 136142

Published: Jan. 1, 2025

Language: Английский

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