Surface Phosphorus Grafting of Ti₃C₂T_x MXene as an Interface Charge “Bridge” for Efficient Electrocatalytic Hydrogen Evolution in All-pH Media

Chemistry of Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 4, 2024

The interface electronic structure of heterogeneous catalysts can be modulated by changing the surface coordination configuration, which is crucial to their catalytic activity. Herein, a phosphorus-grafted Ti3C2Tx MXene platform anchored with an MoS2 nanoflake heterojunction electrocatalyst was assembled through simple phosphorus-hydrothermal method. An charge "bridge" has been created grafting uniform P atoms coordinated O (P-Ti3C2Tx), resulting in charge-transfer channel between P-Ti3C2Tx and MoS2. Based on ultrafast transient absorption spectroscopy, fastest electron-transfer kinetics from (1.7 ps) slowest electron–hole recombination speed (28 were obtained over MoS2@P-Ti3C2Tx than those MoS2@O-Ti3C2Tx MoS2@OP-Ti3C2Tx. Benefiting lower carrier transport activation energy, exhibited stirring electrocatalytic activity toward hydrogen evolution all-pH media, delivered three low overpotentials 48.6, 63.2, 70.5 mV at 10 mA cm–2 alkaline, acid, neutral respectively. Grafting atomic scale create proposes new strategy design efficient pH-universal electrocatalyst.

Language: Английский

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Insights into the role of MXenes as multifunctional material for fuel cell technologies: As electrocatalysts and electrolytes

Journal of Power Sources, Journal Year: 2025, Volume and Issue: 639, P. 236582 - 236582

Published: March 3, 2025

Language: Английский

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Grain Boundary-Enriched Wavy Pd Nanowires Intertwined with MXene Nanosheets toward Formic Acid and Methanol Electrooxidation

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: April 8, 2025

The rational design and precise fabrication of nanostructured noble metals with sophisticated morphology meliorative electronic structures are the key in development advanced electrode materials for fuel cell technology. Herein, we present a robust controllable stereoassembly method to construction 1D grain boundary-enriched wavy Pd nanowires intertwined 2D ultrathin Ti3C2Tx MXene nanosheets (Pd NWs/MX). By taking series unique architectural merits including interconnected nanowires, rich boundaries, stable 1D/2D heterointerface, direct interaction as well high electrical conductivity, resultant NWs/MX heterojunction expresses excellent electrocatalytic activities, strong antitoxic ability, long lifespan toward both formic acid methanol oxidation reactions, all which significantly superior those widely used particle catalysts supported by conventional carbon matrixes.

Language: Английский

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Ultrasmall Rh-decorated porous heterostructures stereoassembled from MXene and graphene for efficient methanol electrooxidation

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 92, P. 535 - 543

Published: Oct. 30, 2024

Language: Английский

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